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-rw-r--r--Build/source/texk/texlive/linked_scripts/Makefile.am3
-rw-r--r--Build/source/texk/texlive/linked_scripts/Makefile.in2
-rwxr-xr-xBuild/source/texk/texlive/linked_scripts/bib2gls/bib2gls.sh12
-rwxr-xr-xBuild/source/texk/texlive/linked_scripts/bib2gls/convertgls2bib.sh12
-rw-r--r--Build/source/texk/texlive/linked_scripts/scripts.lst2
l---------Master/bin/amd64-freebsd/bib2gls1
l---------Master/bin/amd64-freebsd/convertgls2bib1
l---------Master/bin/amd64-netbsd/bib2gls1
l---------Master/bin/amd64-netbsd/convertgls2bib1
l---------Master/bin/armel-linux/bib2gls1
l---------Master/bin/armel-linux/convertgls2bib1
l---------Master/bin/armhf-linux/bib2gls1
l---------Master/bin/armhf-linux/convertgls2bib1
l---------Master/bin/i386-cygwin/bib2gls1
l---------Master/bin/i386-cygwin/convertgls2bib1
l---------Master/bin/i386-darwin/bib2gls1
l---------Master/bin/i386-darwin/convertgls2bib1
l---------Master/bin/i386-freebsd/bib2gls1
l---------Master/bin/i386-freebsd/convertgls2bib1
l---------Master/bin/i386-linux/bib2gls1
l---------Master/bin/i386-linux/convertgls2bib1
l---------Master/bin/i386-netbsd/bib2gls1
l---------Master/bin/i386-netbsd/convertgls2bib1
l---------Master/bin/i386-solaris/bib2gls1
l---------Master/bin/i386-solaris/convertgls2bib1
l---------Master/bin/powerpc-darwin/bib2gls1
l---------Master/bin/powerpc-darwin/convertgls2bib1
l---------Master/bin/powerpc-linux/bib2gls1
l---------Master/bin/powerpc-linux/convertgls2bib1
l---------Master/bin/sparc-solaris/bib2gls1
l---------Master/bin/sparc-solaris/convertgls2bib1
-rwxr-xr-xMaster/bin/win32/bib2gls.exebin0 -> 1536 bytes
-rwxr-xr-xMaster/bin/win32/convertgls2bib.exebin0 -> 1536 bytes
l---------Master/bin/x86_64-cygwin/bib2gls1
l---------Master/bin/x86_64-cygwin/convertgls2bib1
l---------Master/bin/x86_64-darwin/bib2gls1
l---------Master/bin/x86_64-darwin/convertgls2bib1
l---------Master/bin/x86_64-darwinlegacy/bib2gls1
l---------Master/bin/x86_64-darwinlegacy/convertgls2bib1
l---------Master/bin/x86_64-linux/bib2gls1
l---------Master/bin/x86_64-linux/convertgls2bib1
l---------Master/bin/x86_64-solaris/bib2gls1
l---------Master/bin/x86_64-solaris/convertgls2bib1
-rw-r--r--Master/texmf-dist/doc/support/bib2gls/CHANGES3
-rw-r--r--Master/texmf-dist/doc/support/bib2gls/README.md212
-rw-r--r--Master/texmf-dist/doc/support/bib2gls/bib2gls.pdfbin0 -> 718853 bytes
-rwxr-xr-xMaster/texmf-dist/scripts/bib2gls/bib2gls.jarbin0 -> 112916 bytes
-rwxr-xr-xMaster/texmf-dist/scripts/bib2gls/bib2gls.sh12
-rwxr-xr-xMaster/texmf-dist/scripts/bib2gls/convertgls2bib.jarbin0 -> 21545 bytes
-rwxr-xr-xMaster/texmf-dist/scripts/bib2gls/convertgls2bib.sh12
-rw-r--r--Master/texmf-dist/scripts/bib2gls/resources/bib2gls-en.xml373
-rwxr-xr-xMaster/texmf-dist/scripts/bib2gls/texparserlib.jarbin0 -> 694875 bytes
-rw-r--r--Master/texmf-dist/source/support/bib2gls/src/bib2gls-src.zipbin0 -> 79981 bytes
-rw-r--r--Master/texmf-dist/source/support/bib2gls/src/bib2gls.tex7517
-rw-r--r--Master/texmf-dist/source/support/bib2gls/src/gls2bib-src.zipbin0 -> 19202 bytes
-rw-r--r--Master/texmf-dist/source/support/bib2gls/src/texparser-src.zipbin0 -> 583596 bytes
-rwxr-xr-xMaster/tlpkg/bin/tlpkg-ctan-check2
-rwxr-xr-xMaster/tlpkg/libexec/ctan2tds18
-rw-r--r--Master/tlpkg/tlpsrc/bib2gls.tlpsrc2
-rw-r--r--Master/tlpkg/tlpsrc/collection-bibtexextra.tlpsrc1
60 files changed, 8216 insertions, 3 deletions
diff --git a/Build/source/texk/texlive/linked_scripts/Makefile.am b/Build/source/texk/texlive/linked_scripts/Makefile.am
index b240e051c17..32804d0c3a8 100644
--- a/Build/source/texk/texlive/linked_scripts/Makefile.am
+++ b/Build/source/texk/texlive/linked_scripts/Makefile.am
@@ -46,6 +46,7 @@ installdirs-local:
##
## WIN_WRAPPER is w32_wrapper for 32-bit or w64_wrapper for 64-bit.
##
+## The "shell" list aren't just shell scripts, in either direction.
## Some /bin/sh scripts are listed as `other' or `context'
## scripts because they are correctly handled by the wrapper binaries.
## Conversely, some non-sh scripts are listed as `shell' because they
@@ -90,6 +91,8 @@ texmf_other_scripts = \
accfonts/vpl2vpl \
arara/arara.sh \
authorindex/authorindex \
+ bib2gls/bib2gls.sh \
+ bib2gls/convertgls2bib.sh \
bundledoc/arlatex \
bundledoc/bundledoc \
cachepic/cachepic.tlu \
diff --git a/Build/source/texk/texlive/linked_scripts/Makefile.in b/Build/source/texk/texlive/linked_scripts/Makefile.in
index 7b8a70f307a..5274a34bb18 100644
--- a/Build/source/texk/texlive/linked_scripts/Makefile.in
+++ b/Build/source/texk/texlive/linked_scripts/Makefile.in
@@ -305,6 +305,8 @@ texmf_other_scripts = \
accfonts/vpl2vpl \
arara/arara.sh \
authorindex/authorindex \
+ bib2gls/bib2gls.sh \
+ bib2gls/convertgls2bib.sh \
bundledoc/arlatex \
bundledoc/bundledoc \
cachepic/cachepic.tlu \
diff --git a/Build/source/texk/texlive/linked_scripts/bib2gls/bib2gls.sh b/Build/source/texk/texlive/linked_scripts/bib2gls/bib2gls.sh
new file mode 100755
index 00000000000..5f9d7f71e60
--- /dev/null
+++ b/Build/source/texk/texlive/linked_scripts/bib2gls/bib2gls.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+kernel=`uname -s`
+if test "${kernel#*CYGWIN}" != "$kernel"
+then
+ jarpath=`cygpath -w $(kpsewhich --progname=bib2gls --format=texmfscripts bib2gls.jar)`
+else
+ jarpath=`kpsewhich --progname=bib2gls --format=texmfscripts bib2gls.jar`
+fi
+
+java -Djava.locale.providers=CLDR,JRE -jar "$jarpath" "$@"
+
diff --git a/Build/source/texk/texlive/linked_scripts/bib2gls/convertgls2bib.sh b/Build/source/texk/texlive/linked_scripts/bib2gls/convertgls2bib.sh
new file mode 100755
index 00000000000..3e7370b0ca7
--- /dev/null
+++ b/Build/source/texk/texlive/linked_scripts/bib2gls/convertgls2bib.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+kernel=`uname -s`
+if test "${kernel#*CYGWIN}" != "$kernel"
+then
+ jarpath=`cygpath -w $(kpsewhich --progname=convertgls2bib --format=texmfscripts convertgls2bib.jar)`
+else
+ jarpath=`kpsewhich --progname=convertgls2bib --format=texmfscripts convertgls2bib.jar`
+fi
+
+java -jar "$jarpath" "$@"
+
diff --git a/Build/source/texk/texlive/linked_scripts/scripts.lst b/Build/source/texk/texlive/linked_scripts/scripts.lst
index 3f7d35ce3c9..b10451b30e8 100644
--- a/Build/source/texk/texlive/linked_scripts/scripts.lst
+++ b/Build/source/texk/texlive/linked_scripts/scripts.lst
@@ -35,6 +35,8 @@ accfonts/vpl2ovp
accfonts/vpl2vpl
arara/arara.sh
authorindex/authorindex
+bib2gls/bib2gls.sh
+bib2gls/convertgls2bib.sh
bundledoc/arlatex
bundledoc/bundledoc
cachepic/cachepic.tlu
diff --git a/Master/bin/amd64-freebsd/bib2gls b/Master/bin/amd64-freebsd/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/amd64-freebsd/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/amd64-freebsd/convertgls2bib b/Master/bin/amd64-freebsd/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/amd64-freebsd/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/amd64-netbsd/bib2gls b/Master/bin/amd64-netbsd/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/amd64-netbsd/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/amd64-netbsd/convertgls2bib b/Master/bin/amd64-netbsd/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/amd64-netbsd/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/armel-linux/bib2gls b/Master/bin/armel-linux/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/armel-linux/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/armel-linux/convertgls2bib b/Master/bin/armel-linux/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/armel-linux/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/armhf-linux/bib2gls b/Master/bin/armhf-linux/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/armhf-linux/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/armhf-linux/convertgls2bib b/Master/bin/armhf-linux/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/armhf-linux/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/i386-cygwin/bib2gls b/Master/bin/i386-cygwin/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/i386-cygwin/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/i386-cygwin/convertgls2bib b/Master/bin/i386-cygwin/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/i386-cygwin/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/i386-darwin/bib2gls b/Master/bin/i386-darwin/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/i386-darwin/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/i386-darwin/convertgls2bib b/Master/bin/i386-darwin/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/i386-darwin/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/i386-freebsd/bib2gls b/Master/bin/i386-freebsd/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/i386-freebsd/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/i386-freebsd/convertgls2bib b/Master/bin/i386-freebsd/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/i386-freebsd/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/i386-linux/bib2gls b/Master/bin/i386-linux/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/i386-linux/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/i386-linux/convertgls2bib b/Master/bin/i386-linux/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/i386-linux/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/i386-netbsd/bib2gls b/Master/bin/i386-netbsd/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/i386-netbsd/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/i386-netbsd/convertgls2bib b/Master/bin/i386-netbsd/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/i386-netbsd/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/i386-solaris/bib2gls b/Master/bin/i386-solaris/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/i386-solaris/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/i386-solaris/convertgls2bib b/Master/bin/i386-solaris/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/i386-solaris/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/powerpc-darwin/bib2gls b/Master/bin/powerpc-darwin/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/powerpc-darwin/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/powerpc-darwin/convertgls2bib b/Master/bin/powerpc-darwin/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/powerpc-darwin/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/powerpc-linux/bib2gls b/Master/bin/powerpc-linux/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/powerpc-linux/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/powerpc-linux/convertgls2bib b/Master/bin/powerpc-linux/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/powerpc-linux/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/sparc-solaris/bib2gls b/Master/bin/sparc-solaris/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/sparc-solaris/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/sparc-solaris/convertgls2bib b/Master/bin/sparc-solaris/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/sparc-solaris/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/win32/bib2gls.exe b/Master/bin/win32/bib2gls.exe
new file mode 100755
index 00000000000..5777d90a17a
--- /dev/null
+++ b/Master/bin/win32/bib2gls.exe
Binary files differ
diff --git a/Master/bin/win32/convertgls2bib.exe b/Master/bin/win32/convertgls2bib.exe
new file mode 100755
index 00000000000..5777d90a17a
--- /dev/null
+++ b/Master/bin/win32/convertgls2bib.exe
Binary files differ
diff --git a/Master/bin/x86_64-cygwin/bib2gls b/Master/bin/x86_64-cygwin/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/x86_64-cygwin/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-cygwin/convertgls2bib b/Master/bin/x86_64-cygwin/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/x86_64-cygwin/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-darwin/bib2gls b/Master/bin/x86_64-darwin/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/x86_64-darwin/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-darwin/convertgls2bib b/Master/bin/x86_64-darwin/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/x86_64-darwin/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-darwinlegacy/bib2gls b/Master/bin/x86_64-darwinlegacy/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/x86_64-darwinlegacy/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-darwinlegacy/convertgls2bib b/Master/bin/x86_64-darwinlegacy/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/x86_64-darwinlegacy/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-linux/bib2gls b/Master/bin/x86_64-linux/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/x86_64-linux/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-linux/convertgls2bib b/Master/bin/x86_64-linux/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/x86_64-linux/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-solaris/bib2gls b/Master/bin/x86_64-solaris/bib2gls
new file mode 120000
index 00000000000..689d4421a47
--- /dev/null
+++ b/Master/bin/x86_64-solaris/bib2gls
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/bib2gls.sh \ No newline at end of file
diff --git a/Master/bin/x86_64-solaris/convertgls2bib b/Master/bin/x86_64-solaris/convertgls2bib
new file mode 120000
index 00000000000..e099e33b8e7
--- /dev/null
+++ b/Master/bin/x86_64-solaris/convertgls2bib
@@ -0,0 +1 @@
+../../texmf-dist/scripts/bib2gls/convertgls2bib.sh \ No newline at end of file
diff --git a/Master/texmf-dist/doc/support/bib2gls/CHANGES b/Master/texmf-dist/doc/support/bib2gls/CHANGES
new file mode 100644
index 00000000000..9b72a4b6c44
--- /dev/null
+++ b/Master/texmf-dist/doc/support/bib2gls/CHANGES
@@ -0,0 +1,3 @@
+v1.0 (2017-09-09):
+
+ * initial release
diff --git a/Master/texmf-dist/doc/support/bib2gls/README.md b/Master/texmf-dist/doc/support/bib2gls/README.md
new file mode 100644
index 00000000000..29c9a4a3477
--- /dev/null
+++ b/Master/texmf-dist/doc/support/bib2gls/README.md
@@ -0,0 +1,212 @@
+# bib2gls
+
+Command line application to convert `.bib` files to
+`glossaries-extra.sty` resource files.
+
+This application may be used to extract glossary information
+stored in a `.bib` file and convert it into glossary entry
+definition commands. This application should be used
+with `glossaries-extra`'s `record` package option. It performs
+two functions:
+
+ - selects entries according to records found in the `.aux` file
+ (similar to `bibtex`)
+
+ - hierarchically sorts entries and collates location lists
+ (similar to `makeindex` or `xindy`)
+
+This means that the glossary entries can now be managed
+in a system such as JabRef, and only the entries that are
+actually required will be defined, reducing the resources
+required by TeX.
+
+The supplementary application `convertgls2bib` can be used
+to convert existing `.tex` files containing definitions
+(`\newglossaryentry` etc) to the `.bib` format
+required by `bib2gls`.
+
+For example, if `entries.tex` contains:
+```latex
+\newglossaryentry{bird}{name={bird},description={feathered animal}}
+
+\newabbreviation{html}{HTML}{Hypertext Markup Language}
+
+\newterm[plural=geese]{goose}
+
+\newdualentry{svm}{SVM}{support vector machine}
+ {Statistical pattern recognition technique}
+```
+Then do:
+```bash
+convertgls2tex entries.tex entries.bib
+```
+to create `entries.bib`.
+
+# Example
+
+File `entries.bib`:
+
+```bibtex
+@entry{bird,
+ name={bird},
+ description = {feathered animal}
+}
+
+@abbreviation{html,
+ short="HTML",
+ long={hypertext markup language}
+}
+
+@dualentryabbreviation{svm,
+ long = {support vector machine},
+ short = {SVM},
+ description = {statistical pattern recognition technique}
+}
+
+@symbol{v,
+ name={$\vec{v}$},
+ text={\vec{v}},
+ description={a vector}
+}
+
+@index{goose,plural="geese"}
+```
+
+File `myDoc.tex`:
+
+```latex
+\documentclass{article}
+
+\usepackage[record,abbreviations]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ src={entries},% data in entries.bib
+ sort={en-GB}% sort according to 'en-GB' locale
+]
+
+\begin{document}
+\Gls{bird} and \gls{goose}.
+
+First: \gls{svm}. Next: \gls{svm}.
+
+\printunsrtglossaries
+\end{document}
+```
+
+Document build:
+```bash
+pdflatex myDoc
+bib2gls myDoc
+pdflatex myDoc
+```
+(Replace `pdflatex` with `latex`, `xelatex` or `lualatex` as
+appropriate.)
+
+# Installation
+
+The files should be installed as follows where *TEXMF* indicates
+your local or home TEXMF path (for example, `~/texmf/`):
+
+ - *TEXMF*`/scripts/bib2gls/bib2gls.jar` (Java application.)
+ - *TEXMF*`/scripts/bib2gls/convertgls2bib.jar` (Java application.)
+ - *TEXMF*`/scripts/bib2gls/texparserlib.jar` (Java library.)
+ - *TEXMF*`/scripts/bib2gls/resources/bib2gls-en.xml` (English
+ resource file.)
+ - *TEXMF*`/scripts/bib2gls/bib2gls.sh` (Unix-like systems only.)
+ - *TEXMF*`/scripts/bib2gls/convertgls2bib.sh` (Unix-like systems
+ only.)
+ - *TEXMF*`/doc/support/bib2gls/bib2gls.pdf` (User manual.)
+
+Note that `texparserlib.jar` isn't an application. It's
+a library used by `bib2gls.jar` and `convertgls2bib.jar`
+and so needs to be on the same class path as them.
+
+The bash `.sh` scripts are provided for Unix-like users.
+They're not required for Windows.
+
+To test installation:
+```bash
+bib2gls --version
+convertgls2bib --version
+```
+These should display the version details.
+
+#Licence
+
+License GPLv3+: GNU GPL version 3 or later
+http://gnu.org/licenses/gpl.html
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+#Source Code
+
+#User Manual
+
+The documentation `bib2gls.pdf` is compiled using:
+
+```bash
+pdflatex bib2gls
+makeindex -s bib2gls.ist bib2gls
+pdflatex bib2gls
+```
+
+#JAR Files
+
+Create the following directories:
+
+`lib`
+`lib/resources`
+`java`
+`classes/com/dickimawbooks/bib2gls`
+`classes/com/dickimawbooks/gls2bib`
+`classes/com/dickimawbooks/texparserlib`
+
+Unpack the zip files:
+
+```bash
+unzip -d java bib2gls-src.zip
+unzip -d java gls2bib-src.zip
+unzip -d java texparserlib-src.zip
+```
+
+Copy the `.xml` language file to `lib/resources/`
+
+Compile `texparserlib.jar`:
+
+```bash
+cd java/lib
+javac -d ../../classes
+-Xlint:unchecked -Xlint:deprecation *.java */*.java */*/*.java
+cd ../../classes
+jar cf ../lib/texparserlib.jar
+com/dickimawbooks/texparserlib/*.class \
+com/dickimawbooks/texparserlib/*/*.class \
+com/dickimawbooks/texparserlib/*/*/*.class
+```
+
+Compile `bib2gls.jar`:
+
+```bash
+cd java/bib2gls
+javac -d ../../classes -cp ../../lib/texparserlib.jar *.java
+cd ../classes
+jar cmf ../java/bib2gls/Manifest.txt ../lib/bib2gls.jar
+com/dickimawbooks/bib2gls/*.class
+```
+
+Compile `convertgls2bib.jar`:
+
+```bash
+cd java/gls2bib
+javac -d ../../classes -cp ../../lib/texparserlib.jar *.java
+cd ../classes
+jar cmf ../java/gls2bib/Manifest.txt ../lib/convertgls2bib.jar
+com/dickimawbooks/gls2bib/*.class
+```
+
+GitHub:
+
+ - https://github.com/nlct/bib2gls
+ - https://github.com/nlct/texparserlib
+
+Home Page: http://www.dickimaw-books.com/software/bib2gls
diff --git a/Master/texmf-dist/doc/support/bib2gls/bib2gls.pdf b/Master/texmf-dist/doc/support/bib2gls/bib2gls.pdf
new file mode 100644
index 00000000000..c0f20a256f4
--- /dev/null
+++ b/Master/texmf-dist/doc/support/bib2gls/bib2gls.pdf
Binary files differ
diff --git a/Master/texmf-dist/scripts/bib2gls/bib2gls.jar b/Master/texmf-dist/scripts/bib2gls/bib2gls.jar
new file mode 100755
index 00000000000..5e4610756f9
--- /dev/null
+++ b/Master/texmf-dist/scripts/bib2gls/bib2gls.jar
Binary files differ
diff --git a/Master/texmf-dist/scripts/bib2gls/bib2gls.sh b/Master/texmf-dist/scripts/bib2gls/bib2gls.sh
new file mode 100755
index 00000000000..5f9d7f71e60
--- /dev/null
+++ b/Master/texmf-dist/scripts/bib2gls/bib2gls.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+kernel=`uname -s`
+if test "${kernel#*CYGWIN}" != "$kernel"
+then
+ jarpath=`cygpath -w $(kpsewhich --progname=bib2gls --format=texmfscripts bib2gls.jar)`
+else
+ jarpath=`kpsewhich --progname=bib2gls --format=texmfscripts bib2gls.jar`
+fi
+
+java -Djava.locale.providers=CLDR,JRE -jar "$jarpath" "$@"
+
diff --git a/Master/texmf-dist/scripts/bib2gls/convertgls2bib.jar b/Master/texmf-dist/scripts/bib2gls/convertgls2bib.jar
new file mode 100755
index 00000000000..1ccf50f5771
--- /dev/null
+++ b/Master/texmf-dist/scripts/bib2gls/convertgls2bib.jar
Binary files differ
diff --git a/Master/texmf-dist/scripts/bib2gls/convertgls2bib.sh b/Master/texmf-dist/scripts/bib2gls/convertgls2bib.sh
new file mode 100755
index 00000000000..3e7370b0ca7
--- /dev/null
+++ b/Master/texmf-dist/scripts/bib2gls/convertgls2bib.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+kernel=`uname -s`
+if test "${kernel#*CYGWIN}" != "$kernel"
+then
+ jarpath=`cygpath -w $(kpsewhich --progname=convertgls2bib --format=texmfscripts convertgls2bib.jar)`
+else
+ jarpath=`kpsewhich --progname=convertgls2bib --format=texmfscripts convertgls2bib.jar`
+fi
+
+java -jar "$jarpath" "$@"
+
diff --git a/Master/texmf-dist/scripts/bib2gls/resources/bib2gls-en.xml b/Master/texmf-dist/scripts/bib2gls/resources/bib2gls-en.xml
new file mode 100644
index 00000000000..c48375fee45
--- /dev/null
+++ b/Master/texmf-dist/scripts/bib2gls/resources/bib2gls-en.xml
@@ -0,0 +1,373 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
+<properties>
+<comment>English language file for bib2gls</comment>
+
+<entry key="about.version">{0} version {1} ({2})</entry>
+<entry key="about.license">License GPLv3+: GNU GPL version 3 or later &lt;http://gnu.org/licenses/gpl.html&gt;
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.</entry>
+
+<entry key="syntax.usage">Usage: {0} [&lt;option&gt;]+ &lt;aux file&gt;</entry>
+<entry key="syntax.info">Helper application for the glossaries-extra package.
+See the manual for further details.</entry>
+<entry key="syntax.use.help">(Use --help or -h for help.)</entry>
+<entry key="syntax.options">Options:</entry>
+<entry key="syntax.version">{0} (or {1}) Display version and exit.</entry>
+<entry key="syntax.help">{0} (or {1}) Display this help message and exit.</entry>
+<entry key="syntax.debug">{0} [&lt;n&gt;] Switch on debug mode (optionally with the
+ given level).</entry>
+<entry key="syntax.nodebug">{0} Switch off debug mode. (Default.)</entry>
+<entry key="syntax.nodebug">{0} Switch off debug mode. (Default.)
+ Synonym: {1}</entry>
+<entry key="syntax.verbose">{0} Switch on verbose mode.</entry>
+<entry key="syntax.noverbose">{0} Switch off verbose mode. (Default.)
+ Some messages are displayed.
+ Synonym: {1}</entry>
+<entry key="syntax.silent">{0} Only display error messages.</entry>
+<entry key="syntax.locale">{0} &lt;lang&gt; (or {1} &lt;lang&gt;)
+ Use language resource file for &lt;lang&gt;.</entry>
+<entry key="syntax.log">{0} &lt;file&gt; (or {1} &lt;file&gt;)
+ Set transcript file name.</entry>
+<entry key="syntax.dir">{0} &lt;directory&gt; (or {1} &lt;directory&gt;)
+ Files relative to &lt;directory&gt;.
+ (This doesn''t change the current working
+ directory.)</entry>
+<entry key="syntax.interpret">{0} Switch on interpret mode (default).</entry>
+<entry key="syntax.no.interpret">{0} Switch off interpret mode.</entry>
+
+<entry key="syntax.mfirstuc">{0} &lt;fields&gt;|all (or {1} &lt;fields&gt;|all)
+ Insert an empty group if fields start
+ with certain problematic commands
+ to protect against case-changing commands
+ like \Gls.
+
+ The default is to do this for all fields.
+ To do this for only a subset of fields,
+ set &lt;fields&gt; to a comma-separated
+ list of fields (e.g. 'name,short,long').
+ The keyword 'all' indicates all fields.</entry>
+<entry key="syntax.no.mfirstuc">{0}
+ Switch off the auto-insertion of an empty
+ group for all fields.</entry>
+
+<entry key="syntax.no.math.mfirstuc">{0}
+ Switch off the auto-insertion of an empty
+ group for math-shift ($).</entry>
+
+<entry key="syntax.math.mfirstuc">{0}
+ Switch on the auto-insertion of an empty
+ group for math-shift ($).
+ This option will be overriden by
+ {1}</entry>
+
+
+<entry key="syntax.check.shortcuts">{0} &lt;option&gt;
+ Check for the shortcut commands when
+ search for dependencies.
+ Permitted values of &lt;option&gt;:
+ ''acronyms'' (or ''acro'')
+ ''abbreviations'' (or ''abbr'')
+ ''all'' (or ''true'')
+ ''none'' (or ''false'')</entry>
+<entry key="syntax.check.nested">{0} &lt;list&gt;|"none"
+ Check each field listed in &lt;list&gt;
+ for potentially problematic nested link
+ text. (Default list: name, text, plural,
+ first, firstplural, short, shortplural,
+ long, longplural, symbol).
+
+ If "none", disable check.</entry>
+<entry key="syntax.nocheck.nested">{0}
+ Don''t check for potentially problematic
+ nested link text. (Equivalent to
+ {1} "none")</entry>
+<entry key="syntax.format.map">{0} &lt;key&gt;=&lt;value&gt;[,&lt;key&gt;=&lt;value&gt;]* (or {1} &lt;key&gt;=&lt;value&gt;[,&lt;key&gt;=&lt;value&gt;]*)
+ Set location format mappings.</entry>
+<entry key="syntax.group">{0} or {1}
+ Add ''group'' field to entries.</entry>
+<entry key="syntax.no.group">{0}
+ Don''t add ''group'' field to entries.</entry>
+<entry key="syntax.trim.fields">{0}
+ Trim leading and trailing spaces from fields.</entry>
+<entry key="syntax.no.trim.fields">{0}
+ Don''t trim leading and trailing spaces from fields (default).</entry>
+<entry key="syntax.tex.encoding">{0} &lt;name&gt;
+ Set the character encoding for the output files.</entry>
+
+<entry key="message.reading">Reading {0}</entry>
+<entry key="message.writing">Writing {0}</entry>
+<entry key="message.no.read">No read access for {0}</entry>
+<entry key="message.no.write">No write access for {0}</entry>
+<entry key="message.running">Running {0}</entry>
+<entry key="message.processing">Processing {0}</entry>
+<entry key="message.copying">Copying {0} -&gt; {1}</entry>
+<entry key="message.moving">Moving {0} -&gt; {1}</entry>
+<entry key="message.added.dep">Added dependent: {0}</entry>
+<entry key="message.added.parent">Adding parent: {0}</entry>
+<entry key="message.selection.mode">Selection mode: {0}</entry>
+<entry key="message.ignore.fields">Ignoring fields:</entry>
+<entry key="message.sort.mode">Sort mode: {0}</entry>
+<entry key="message.sort.field">Sort field: {0}</entry>
+<entry key="message.label.prefix">Label prefix: {0}</entry>
+<entry key="message.dual.label.prefix">Dual label prefix: {0}</entry>
+<entry key="message.dual.sort.mode">Dual sort mode: {0}</entry>
+<entry key="message.dual.sort.field">Dual sort field: {0}</entry>
+<entry key="message.dual.entry.mappings">Dual entry mappings:</entry>
+<entry key="message.dual.symbol.mappings">Dual symbol mappings:</entry>
+<entry key="message.dual.abbreviation.mappings">Dual abbreviation mappings:</entry>
+<entry key="message.dual.entryabbreviation.mappings">Dual entry-abbreviation mappings:</entry>
+<entry key="message.process.result">Processed returned: {0}</entry>
+
+<entry key="message.log.file">Transcript written to {0}.</entry>
+<entry key="message.written">{0} written to {1}.</entry>
+<entry key="message.written.total">{0} written in total.</entry>
+
+<entry key="message.0.entry">No entries</entry>
+<entry key="message.1.entry">1 entry</entry>
+<entry key="message.2.entry">{0,number} entries</entry>
+
+<entry key="message.1.sty">1 recognised package:</entry>
+<entry key="message.2.sty">{0,number} recognised packages:</entry>
+
+<entry key="message.checking.read">Checking read access for {0}</entry>
+<entry key="message.checking.write">Checking write access for {0}</entry>
+<entry key="message.setting.sort">Initialising collation keys (strength={0}, decomposition={1})</entry>
+<entry key="message.no.fallback">Entry type ''{0}'' has no fallback for field: {1}</entry>
+<entry key="message.inconsistent.range">Inconsistent location format {0}
+with range started by {1}</entry>
+<entry key="message.merge.range">Merging location {0}
+into explicit range {1}</entry>
+<entry key="message.uc.protecting">Inserting empty group in front of {0} to protect it from mfirstuc.</entry>
+<entry key="message.discarding.entry">Discarding entry {0}</entry>
+<entry key="message.pattern.info">Pattern: {0}. Field: {1}. Value: {2}. Matches: {3}.</entry>
+<entry key="message.calc.text.width">Calculating width of name field for entry ''{0}''</entry>
+<entry key="message.calc.text.width.result">Calculated width of ''{0}'': {1,number}</entry>
+<entry key="message.parsing.code">Parsing code block:</entry>
+<entry key="message.unknown.tex.charset">Unable to detect character encoding for TeX file.
+Defaulting to: {0}.
+(Use {1} if this is incorrect.)</entry>
+<entry key="message.tex.charset">TeX character encoding: {0}</entry>
+<entry key="message.adding.target.record">Adding record {0} from aliased entry {1}.</entry>
+<entry key="message.ignored.record">Ignoring record {0}.</entry>
+<entry key="message.normalizing">Normalising {0} to {1}.</entry>
+<entry key="message.norm.distinct">Normalized {0} distinct from {1}.</entry>
+<entry key="message.no.norm">Can''t normalize {0}.</entry>
+<entry key="message.collator.rules">Collator rules: {0}.</entry>
+<entry key="message.no.collation.element">No collation element for: {0}.</entry>
+<entry key="message.break.points">Break points: {0}.</entry>
+
+<entry key="tag.page">Page</entry>
+<entry key="tag.pages">Pages</entry>
+<entry key="tag.passim">passim</entry>
+
+<!--
+ Letter groups usually only have the first character converted to upper case
+ (for example, the digraph 'dz' is converted to 'Dz'). This doesn't apply
+ to the Dutch digraph 'ij', which should be converted to 'IJ'. Other
+ exceptions may be added as appropriate.
+ -->
+<entry key="grouptitle.case.ij">IJ</entry>
+
+<entry key="warning.title">Warning: {0}</entry>
+<entry key="warning.substituting">Substituting {0} with {1}</entry>
+<entry key="warning.removing">Removing {0}</entry>
+<entry key="warning.ignoring.unknown.entry.type">Ignoring unknown entry type: {0}</entry>
+<entry key="warning.ignoring.unknown.encoding">Ignoring unknown encoding: {0}</entry>
+<entry key="warning.can.find.arg">Can't detect argument for: \{0}</entry>
+<entry key="warning.no.default.sort">Can't determine sort value for: {0}
+(Using sort field ''{1}''.)</entry>
+<entry key="warning.missing.field">Entry ''{0}'' missing required field: {1}</entry>
+<entry key="warning.potential.nested.link">Entry ''{0}'' has potentially nested link text in field: {1}
+Consider using \glsps'{'{3}'}' or \glspt'{'{3}'}' instead of {2}'{'{3}'}'</entry>
+<entry key="warning.dir.no.write">Directory not writable: {0}
+Using TEXMFOUTPUT instead: {1}</entry>
+<entry key="warning.conflicting.range.format">Entry location conflict for formats: {0} and {1}
+Replacing {1} with {2}</entry>
+<entry key="warning.discarding.conflicting.record">Entry location conflict for formats: {0} and {1}
+Discarding: {2}
+Conflicts with: {3}</entry>
+<entry key="warning.discarding.conflicting.record.using.map">Entry location conflict.
+Obeying requested mapping {0} -&gt; {1}
+Discarding: {2}
+Keeping: {3}</entry>
+<entry key="warning.discarding.conflicting.record.using.map2">Entry location conflict.
+Obeying requested mapping {0} -&gt; {1} and {2} -&gt; {3}
+Discarding: {4}
+Discarding: {5}
+Replacement: {6}</entry>
+<entry key="warning.cant.find.parent">Parent ''{0}'' not found for entry {1}</entry>
+<entry key="warning.cant.find.parent.name">Can''t determine parent name for entry {0}</entry>
+<entry key="warning.field.clash">Field clash: {0} and {1}
+Ignoring {1}</entry>
+<entry key="warning.field.unsupported">Unsupported field: {0}
+(Update glossaries-extra.sty to at least version {1})</entry>
+<entry key="warning.option.clash">Option clash: {0} and {1}
+Ignoring {1}</entry>
+<entry key="warning.option.pair.required">Resource option {0} requires option {1}</entry>
+<entry key="warning.group.option.required">Resource option {0} requires application switch {1}</entry>
+<entry key="warning.parent.missing">Parent {0} does not occur before entry {1} so removing relationship.</entry>
+<entry key="warning.unknown.field.pattern">Ignoring pattern for unknown field: {0}</entry>
+<entry key="warning.notbasiclatin.id">Problematic entry label: {0}
+You document doesn''t seem to have used fontspec which
+suggests it''s not using XeLaTeX or LuaLaTeX, so you need
+to restrict your labels to the Basic Latin set (or
+switch TeX engines).</entry>
+<entry key="warning.spchars.id">Problematic entry label: {0}
+Contains one or more special characters.</entry>
+<entry key="warning.alias.not.found">Can''t find target {0} for aliased entry {1}.
+Aliased entries must be in the same resource set as their target entries with option {2}={3}.</entry>
+<entry key="warning.deprecated">''{0}'' deprecated. Use ''{1}'' instead.</entry>
+
+<entry key="error.title">Error: {0}</entry>
+<entry key="error.alias.map.forbidden">The 'alias' field can't be mapped.</entry>
+<entry key="error.no.sty.version">Unable to read version date for package {0}</entry>
+<entry key="error.sty.too.old">Package {0} version {1} is too old.
+Minimum version {2} required.</entry>
+<entry key="error.unknown.tex.charset">Unknown TeX charset: {0}
+Defaulting to {1}. Use {2} to set another encoding.</entry>
+<entry key="error.missing.aux.cs.require_cs">Missing \{0} in aux file. (Have you used \{1}?)</entry>
+<entry key="error.missing.aux.cs.require_cs_or">Missing \{0} in aux file. (Have you used \{1} or \{2}?)</entry>
+<entry key="error.missing.records">No records found in aux file.
+Have you used the glossaries-extra.sty ''record'' option?
+Have you indexed your entries using commands like \gls?</entry>
+<entry key="error.missing.aux.new.cs">Missing \{0} in aux file (make sure glossaries-extra.sty is at least {1}).</entry>
+<entry key="error.only.one.aux">Only one aux file permitted.</entry>
+<entry key="error.no.aux">Missing aux file. Use --help for help.</entry>
+<entry key="error.file.not.found">File not found: {0}</entry>
+<entry key="error.missing.src">File not found: {0}
+(Did you forget to use the ''src'' key?)</entry>
+<entry key="error.dir.not.found">Directory not found: {0}</entry>
+<entry key="error.not.dir">Not a directory: {0}</entry>
+<entry key="error.cant.open.log">Can't open log file: {0}</entry>
+<entry key="error.invalid.opt.value">Invalid ''{0}'' value: {1}</entry>
+<entry key="error.invalid.opt.int.value">Invalid ''{0}'' value: {1} (number required)</entry>
+<entry key="error.invalid.opt.minint.value">Invalid ''{0}'' value: {1} (can''t be less than {2,number})</entry>
+<entry key="error.invalid.choice.value">Invalid ''{0}'' value: {1} (allowed values: {2})</entry>
+<entry key="error.invalid.opt.list.size">Invalid value for: {0}
+Value must be a list of size {2,number}</entry>
+<entry key="error.invalid.opt.keylist.value">Invalid ''{0}'' value ''{1}'' (within option ''{2}'')</entry>
+<entry key="error.invalid.opt.keylist.key">Invalid key ''{0}'' within option ''{1}''</entry>
+<entry key="error.invalid.opt.keylist.pattern">Invalid pattern ''{1}'' in {0}='{'{1}'}' (within option ''{2}'')</entry>
+<entry key="error.missing.value">Missing value for: {0}</entry>
+<entry key="error.option.clash">Option clash: {0} and {1}</entry>
+<entry key="error.invalid.dual.map">Invalid mapping: {0}={1}
+The size of the first list ({2,number}) is not the same as the size of
+the second list ({3,number}).</entry>
+<entry key="error.invalid.field">Invalid field ''{0}'' provided by option ''{1}''</entry>
+<entry key="error.openin.forbidden">Read access forbidden for file: {0}</entry>
+<entry key="error.openout.forbidden">Write access forbidden for file: {0}</entry>
+<entry key="error.forbidden.ext">Write access forbidden for extension: {0}</entry>
+<entry key="error.cant.open.process.stream">Unable to open input stream from process: {0}</entry>
+<entry key="error.cyclic.hierarchy">Cyclical hierarchy for entry: {0}</entry>
+<entry key="error.duplicate.resource">Duplicate resource: {0}</entry>
+<entry key="error.nested.range">Nested location range: {0}
+Outer range started with: {1}</entry>
+<entry key="error.range.missing.start">Unmatched end location range {0}</entry>
+<entry key="error.inconsistent.range">Inconsistent location format {0}
+with range started by {1}</entry>
+<entry key="error.range.missing.end">Unmatched start location range {0}</entry>
+<entry key="error.bib.contents.parse">Syntax error parsing @{0}:
+{1}
+</entry>
+<entry key="error.bib.contents.parse.before">Syntax error parsing @{0}:
+{1}
+Error occurred before: {2}
+</entry>
+<entry key="error.bib.contents.parse.data">Syntax error parsing @{0} ({1}):
+{2}
+</entry>
+<entry key="error.bib.contents.parse.data.before">Syntax error parsing @{0} ({1}):
+{2}
+Error occurred before: {3}
+</entry>
+<entry key="error.invalid.sort.rule">Invalid syntax in sort rule:
+{0}</entry>
+
+<!--
+ The following messages are used by convertgls2bib
+-->
+
+<entry key="gls2bib.override.newdualentry">Overriding default definition of \\newdualentry with custom
+definition. (Change \\newcommand to \\providecommand if you want
+\\newdualentry[options]'{'label'}{'short'}{'long'}{'description'}'
+converted to @dualentryabbreviation.)</entry>
+
+<!--
+ The following messages are used by various parts of
+ texparserlib.jar only a few of them may actually be generated by
+ bib2gls which is just using that library to parse the aux and bib files.
+ -->
+
+<entry key="error.line">Line {0}: {1}.</entry>
+<entry key="error.line_with_code">Line {0}: {1} (error code {2}).</entry>
+<entry key="error.unknown">Unknown error</entry>
+<entry key="error.exec_failed">Failed to execute: {0}</entry>
+<entry key="error.app_failed">{0} failed with exit code {1}</entry>
+<entry key="error.interrupted">Process interrupted</entry>
+<entry key="error.syntax">Syntax error: {0}</entry>
+<entry key="error.syntax.unknown_option">Unknown option: {0}</entry>
+<entry key="error.syntax.only_one">Only one {0} permitted</entry>
+<entry key="error.syntax.only_one_input">Only one input file permitted</entry>
+<entry key="error.syntax.missing_filename">Filename expected after {0}</entry>
+<entry key="error.syntax.missing_input">File name expected after {0}</entry>
+<entry key="error.syntax.batch.missing_in">Input file required for batch mode</entry>
+<entry key="error.syntax.batch.missing_out">Output directory required for batch mode</entry>
+<entry key="error.syntax.batch.unknown_format">Unknown format ''{0}''</entry>
+<entry key="error.exists">{0} already exists</entry>
+
+<entry key="tex.error.bad_param">Parameter digit 1 to 9 expected. Found ''{0}''</entry>
+<entry key="tex.error.no_eg">Missing end group</entry>
+<entry key="tex.error.par_before_eg">Paragraph break found before end group</entry>
+<entry key="tex.error.unexpected_eg">Unexpected end group found</entry>
+<entry key="tex.error.missing_endmath">Missing end math</entry>
+<entry key="tex.error.dollar2_ended_with_dollar">$$ ended with $</entry>
+<entry key="tex.error.not_found">Expected ''{0}'' but not found</entry>
+<entry key="tex.error.missing_param">Argument expected for ''{0}'' but not found</entry>
+<entry key="tex.error.empty_stack">Argument expected but not found (empty stack)</entry>
+<entry key="tex.error.not_math_mode">{0} is only permitted in math mode</entry>
+<entry key="tex.error.invalid_accent">{0} is not a recognised accent </entry>
+<entry key="tex.error.ambiguous_midcs">Ambiguous use of {0}</entry>
+<entry key="tex.error.missing_closing">Missing closing {0}</entry>
+<entry key="tex.error.dimen_expected">Dimension expected</entry>
+<entry key="tex.error.missing_unit">Missing unit</entry>
+<entry key="tex.error.expected">Expected {0}</entry>
+<entry key="tex.error.undefined">Undefined command {0}</entry>
+<entry key="tex.error.undefined_char">Undefined active character ''{0}''</entry>
+<entry key="tex.error.cs_expected">Control sequence expected (found ''{0}'')</entry>
+<entry key="tex.error.number_expected">Number expected (found ''{0}'')</entry>
+<entry key="tex.error.register_undef">Unknown register ''{0}''</entry>
+<entry key="tex.error.syntax">Invalid syntax for {0}</entry>
+<entry key="tex.error.extra">Extra {0}</entry>
+<entry key="tex.error.extra_or_forgotten">Extra {0}, or forgotten {1}</entry>
+<entry key="tex.error.double_subscript">Double subscript _{0}_ (replaced with _{0}'{}'_)</entry>
+<entry key="tex.error.double_superscript">Double superscript ^{0}^ (replaced with ^{0}'{}'^)</entry>
+<entry key="tex.error.illegal_align">Illegal alignment {0}</entry>
+<entry key="tex.error.misplaced_omit">Misplaced \omit</entry>
+<entry key="tex.error.improper_alphabetic_constant">Improper alphabetic constant {0}</entry>
+
+<entry key="latex.error.no_alignment">No alignment specifiers found</entry>
+<entry key="latex.error.undefined_counter">No counter ''{0}'' defined</entry>
+<entry key="latex.error.multi_begin_doc">Only one \begin'{document}' permitted</entry>
+<entry key="latex.error.no_begin_doc">No \begin'{document}' found</entry>
+<entry key="latex.error.multi_cls">Only one \documentclass permitted</entry>
+<entry key="latex.error.missing_key">Missing ''{0}'' key</entry>
+<entry key="latex.error.extra_end">Extra \end'{'{0}'}' found</entry>
+<entry key="latex.error.unaccessible">Unaccessible ''{0}''</entry>
+<entry key="latex.error.defined">''{0}'' already defined</entry>
+<entry key="latex.error.illegal_array_arg_char">Illegal character ''{0}'' in array arg</entry>
+<entry key="latex.error.lonely_item">Lonely \item</entry>
+
+<entry key="bibtex.error.missing_value">Missing value</entry>
+<entry key="bibtex.error.expecting">Expecting ''{0}''</entry>
+<entry key="bibtex.error.expecting_or">Expecting ''{0}'' or ''{1}''</entry>
+<entry key="bibtex.error.missing_field_part">Missing field part</entry>
+<entry key="bibtex.error.missing_field_name">Missing field name</entry>
+<entry key="bibtex.error.unbalanced_braces">Unbalanced braces</entry>
+<entry key="bibtex.error.immediately_follows_entry_type">''{0}'' immediately follows entry type</entry>
+<entry key="bibtex.error.immediately_follows_field_name">''{0}'' immediately follows field name</entry>
+<entry key="bibtex.error.illegal_end">Illegal end</entry>
+<entry key="bibtex.error.missing">Missing</entry>
+<entry key="bibtex.error.too_many_commas">Too many commas in name ''{0}''</entry>
+<entry key="bibtex.error.string_name_undefined">String name ''{0}'' undefined</entry>
+</properties>
diff --git a/Master/texmf-dist/scripts/bib2gls/texparserlib.jar b/Master/texmf-dist/scripts/bib2gls/texparserlib.jar
new file mode 100755
index 00000000000..70561ba72dc
--- /dev/null
+++ b/Master/texmf-dist/scripts/bib2gls/texparserlib.jar
Binary files differ
diff --git a/Master/texmf-dist/source/support/bib2gls/src/bib2gls-src.zip b/Master/texmf-dist/source/support/bib2gls/src/bib2gls-src.zip
new file mode 100644
index 00000000000..8fdaf076b08
--- /dev/null
+++ b/Master/texmf-dist/source/support/bib2gls/src/bib2gls-src.zip
Binary files differ
diff --git a/Master/texmf-dist/source/support/bib2gls/src/bib2gls.tex b/Master/texmf-dist/source/support/bib2gls/src/bib2gls.tex
new file mode 100644
index 00000000000..b26599e0a0e
--- /dev/null
+++ b/Master/texmf-dist/source/support/bib2gls/src/bib2gls.tex
@@ -0,0 +1,7517 @@
+% arara: pdflatex
+% arara: makeindex: {style: bib2gls.ist}
+% arara: pdflatex
+\documentclass[titlepage=false,index=totoc,12pt]{scrreprt}
+
+\usepackage[T1]{fontenc}
+\usepackage{tgtermes}
+\usepackage[x11names]{xcolor}
+\usepackage{alltt}
+\usepackage{upquote}
+\usepackage{etoolbox}
+\usepackage{filecontents}
+
+\newcommand*{\actual}{=}
+
+\begin{filecontents*}{\jobname.ist}
+actual '='
+\end{filecontents*}
+
+\usepackage{xcolor}
+\usepackage{amsmath}
+\usepackage{accents}
+\usepackage{makeidx}
+\usepackage{datetime2}
+\usepackage[hidelinks]{hyperref}
+\usepackage{glossaries-extra}
+\glsdisablehyper
+
+\makeindex
+
+\newabbreviation{IETF}{IETF}{Internet Engineering Task Force}
+
+\DTMsavetimestamp{creation}{2017-01-20T15:39:00Z}
+
+\IfFileExists{../java/Bib2Gls.java}
+{
+ \DTMsavefilemoddate{moddate}{../java/Bib2Gls.java}
+}
+{
+ \DTMsavenow{moddate}
+}
+
+\newif\ifmainmatter
+
+\newcommand{\frontmatter}{%
+ \clearpage\pagenumbering{roman}%
+ \mainmatterfalse
+}
+\newcommand{\mainmatter}{%
+ \clearpage\pagenumbering{arabic}%
+ \mainmattertrue
+}
+
+\newcommand{\bibgls}{\appfmt{bib2gls}}
+
+\newcommand*{\sectionref}[1]{\hyperref[#1]{section~\ref*{#1}}}
+\newcommand*{\Sectionref}[1]{\hyperref[#1]{Section~\ref*{#1}}}
+
+\newcommand{\langxml}{\hyperref[sec:lang.xml]{language resource file}}
+
+\newcommand{\qt}[1]{``#1''}
+
+\newcommand{\qtt}[1]{\qt{\,\texttt{#1}\,}}
+
+\newcommand{\dequals}{%
+ \texorpdfstring
+ {\discretionary{}{}{}\texttt{=}\discretionary{}{}{}}%
+ {=}%
+}
+
+\newcommand{\dcomma}{%
+ \texorpdfstring
+ {\texttt{,}\discretionary{}{}{}}%
+ {,}%
+}
+
+\newcommand{\dcolon}{%
+ \texorpdfstring
+ {\texttt{:}\discretionary{}{}{}}%
+ {:}%
+}
+
+% put page break before dash to avoid confusion with a hyphen
+\newcommand{\dhyphen}{%
+ \texorpdfstring
+ {\discretionary{}{}{}\texttt{-}}%
+ {-}%
+}
+
+\pdfstringdefDisableCommands{%
+ \def\dhyphen{-}%
+ \def\dcolon{:}%
+ \def\dcomma{,}%
+ \def\dequals{,}%
+}
+
+\newcommand*{\filefmt}[1]{\texorpdfstring{\nolinkurl{#1}}{#1}}
+\newcommand*{\metafilefmt}[3]{%
+ \filefmt{#1}\discretionary{}{}{}\meta{#2}\discretionary{}{}{}\filefmt{#3}%
+}
+
+\newcommand*{\primaryresourcefmt}{%
+ \texorpdfstring
+ {\texttt{\char`\\ jobname.glstex}}%
+ {\string\\jobname.glstex}%
+}
+
+\newcommand*{\suppresourcefmt}[1]{%
+ \texorpdfstring
+ {\texttt{\char`\\ jobname-#1.glstex}}%
+ {\string\\jobname-1.glstex}%
+}
+
+
+\newcommand*{\appfmt}[1]{\texorpdfstring{\texttt{#1}}{#1}}
+\newcommand*{\styfmt}[1]{\texorpdfstring{\textsf{#1}}{#1}}
+\newcommand*{\csfmt}[1]{\texorpdfstring{\texttt{\char`\\ #1}}{\string\\#1}}
+\newcommand*{\envfmt}[1]{\texorpdfstring{\textsf{#1}}{#1}}
+\newcommand*{\optfmt}[1]{\texorpdfstring{\texttt{#1}}{#1}}
+\newcommand*{\csoptfmt}[1]{\texorpdfstring{\textcolor{DarkSeaGreen4}{\optfmt{#1}}}{#1}}
+\newcommand*{\styoptfmt}[1]{\texorpdfstring{\textcolor{DarkOrchid4}{\optfmt{#1}}}{#1}}
+\newcommand*{\fieldfmt}[1]{\texorpdfstring{\texttt{\color{DarkSlateGray4}#1}}{#1}}
+\newcommand*{\entryfmt}[1]{\texorpdfstring{\texttt{\color{SteelBlue4}#1}}{#1}}
+\newcommand*{\abbrstylefmt}[1]{\texorpdfstring{\textsf{#1}}{#1}}
+\newcommand*{\glostylefmt}[1]{\texorpdfstring{\textsf{#1}}{#1}}
+\newcommand*{\catattrfmt}[1]{\texorpdfstring{\textsf{#1}}{#1}}
+\newcommand*{\counterfmt}[1]{\texorpdfstring{\textsf{#1}}{#1}}
+\newcommand*{\idprefixfmt}[1]{%
+ \texorpdfstring{\texttt{#1\spacefactor999 .}}{#1.}}
+
+\newcommand*{\argor}{\texorpdfstring{\protect\textbar}{\string\|}}
+
+\newrobustcmd*{\texmeta}[1]{{\normalfont\normalcolor$\langle$\emph{#1}$\rangle$}}
+
+\newcommand*{\meta}[1]{%
+ \texorpdfstring{\texmeta{#1}}{#1}%
+}
+
+\newcommand*{\oarg}[1]{[#1]}
+\newcommand*{\oargm}[1]{\oarg{\meta{#1}}}
+
+\newcommand*{\marg}[1]{\texorpdfstring
+ {\discretionary{}{}{}\char`\{#1\char`\} }%
+ {\{#1\}}%
+}
+
+\newcommand*{\margm}[1]{\marg{\meta{#1}}}
+
+\newcommand*{\file}[1]{%
+ \texorpdfstring
+ {\filefmt{#1}\index{#1\actual\filefmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\ext}[1]{%
+ \texorpdfstring
+ {\filefmt{.#1}\index{file formats!#1\actual\filefmt{.#1}}}%
+ {.#1}%
+}
+
+\newcommand*{\app}[1]{%
+ \texorpdfstring
+ {\appfmt{#1}\index{#1\actual\appfmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\sty}[1]{%
+ \texorpdfstring
+ {\styfmt{#1}\index{#1\actual\styfmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\env}[1]{%
+ \texorpdfstring
+ {\envfmt{#1}\index{#1 environment\actual\envfmt{#1} environment}}%
+ {#1}%
+}
+
+\newcommand*{\abbrstyle}[1]{%
+ \texorpdfstring
+ {\abbrstylefmt{#1}\index{abbreviation style!#1\actual\abbrstylefmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\glostyle}[1]{%
+ \texorpdfstring
+ {\glostylefmt{#1}\index{glossary style!#1\actual\glostylefmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\catattr}[1]{%
+ \texorpdfstring
+ {\catattrfmt{#1}\index{category attributes!#1\actual\catattrfmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\counter}[1]{%
+ \texorpdfstring
+ {\counterfmt{#1}\index{#1 counter\actual\counterfmt{#1} counter}}%
+ {#1}%
+}
+
+\newcommand*{\idprefix}[1]{%
+ \texorpdfstring
+ {\idprefixfmt{#1}\index{label prefixes!#1\actual\protect\idprefixfmt{#1}}}%
+ {#1}%
+}
+
+\newcommand*{\cs}[1]{%
+ \texorpdfstring
+ {\csfmt{#1}\index{#1\actual\protect\csfmt{#1}}}
+ {\string\\#1}%
+}
+
+\newcommand*{\styopt}[2][]{%
+ \texorpdfstring%
+ {%
+ \styoptfmt{#2\ifblank{#1}{}{\dequals\marg{#1}}}%
+ \index{package options!#2\actual\protect\styoptfmt{#2}}%
+ \index{#2\actual\protect\styoptfmt{#2}}%
+ }%
+ {#2\ifblank{#1}{}{=#1}}%
+}
+
+\newcommand*{\keyvallist}{%
+ \texorpdfstring
+ {key\dequals value list}%
+ {key=value list}%
+}
+
+\newcommand*{\csopt}[2][]{\gencsopt[#1]{glsxtrresourcefile}{#2}}%
+\newcommand*{\glsopt}[2][]{\gencsopt[#1]{gls}{#2}}%
+\newcommand*{\glsaddopt}[2][]{\gencsopt[#1]{glsadd}{#2}}%
+
+\newcommand*{\csoptnv}[1]{%
+ \texorpdfstring
+ {\protect\gencsopt{glsxtrresourcefile}{#1}}%
+ {#1}%
+}%
+
+\newcommand*{\csopteqval}[1]{\csoptfmt{=\margm{#1}}}
+
+\newcommand*{\gencsopt}[3][]{%
+ \texorpdfstring%
+ {%
+ \csoptfmt{#3\ifblank{#1}{}{\dequals\marg{#1}}}%
+ \ifmainmatter
+ {\def\dhyphen{-}\index{#2\actual\protect\csfmt{#2}!#3\actual\protect\csoptfmt{#3}}}%
+ \fi
+ }%
+ {#3\ifblank{#1}{}{=#1}}%
+}
+
+\newcommand*{\field}[1]{%
+ \texorpdfstring
+ {\fieldfmt{#1}%
+ \index{fields!#1\actual\protect\fieldfmt{#1}}%
+ \index{#1 field\actual\protect\fieldfmt{#1} field}%
+ }%
+ {#1}%
+}
+
+\newcommand*{\entry}[1]{%
+ \texorpdfstring
+ {\entryfmt{#1}%
+ \index{entry types!#1\actual\protect\entryfmt{@#1}}%
+ \index{#1 entry type\actual\protect\entryfmt{@#1} entry type}%
+ }%
+ {#1}%
+}
+
+\newcommand*{\atentry}[1]{%
+ \texorpdfstring
+ {\entryfmt{@#1}%
+ \index{entry types!#1\actual\protect\entryfmt{@#1}}%
+ \index{#1 entry type\actual\protect\entryfmt{@#1} entry type}%
+ }%
+ {@#1}%
+}
+
+\newrobustcmd{\longswitch}{\string-{}\string-}
+
+\newcommand*{\longargfmt}[1]{%
+ \texorpdfstring{\texttt{\longswitch #1}}%
+ {\string-\string-#1}%
+}
+
+\newcommand*{\shortargfmt}[1]{%
+ \texorpdfstring{\texttt{\string-#1}}%
+ {\string-#1}%
+}
+
+\newrobustcmd{\longargindex}[1]{%
+ \ifmainmatter
+ {\def\dhyphen{-}%
+ \index{command line options!#1\actual\protect\longargfmt{#1}}%
+ }%
+ \fi
+}
+
+\newcommand*{\longarg}[1]{%
+ \texorpdfstring
+ {\longargfmt{#1}\longargindex{#1}}%
+ {\string-\string-#1}%
+}
+
+\newrobustcmd{\shortargindex}[1]{%
+ \ifmainmatter
+ {\def\dhyphen{-}%
+ \index{command line options!#1\actual\protect\shortargfmt{#1}}%
+ }%
+ \fi
+}
+
+\newcommand*{\shortarg}[1]{%
+ \texorpdfstring
+ {\shortargfmt{#1}\shortargindex{#1}}%
+ {\string-#1}%
+}
+
+\newcommand*{\keyword}[1]{%
+ \texorpdfstring{\emph{#1}\index{#1}}{#1}%
+}
+
+\definecolor{defbackground}{rgb}{1,1,0.75}
+\newsavebox\defsbox
+\newlength\defwidth
+
+\newenvironment{definition}%
+{%
+ \setlength{\fboxsep}{4pt}\setlength{\fboxrule}{1.25pt}%
+ \begin{lrbox}{\defsbox}%
+ \setlength\defwidth\linewidth
+ \addtolength\defwidth{-2\fboxrule}%
+ \addtolength\defwidth{-2\fboxsep}%
+ \begin{minipage}{\defwidth}
+ \flushleft\ttfamily\ignorespaces
+}%
+{%
+ \end{minipage}%
+ \end{lrbox}\par\medskip\noindent
+ \fcolorbox{black}{defbackground}{\usebox\defsbox}%
+ \medskip\par\noindent
+ \ignorespacesafterend
+}
+
+% This is a bit fiddly. Need to represent \vec{v} in typewriter
+% font for the interpreter examples. ($\mathtt{\vec{v}}$ doesn't
+% work)
+\newsavebox\varrow
+\sbox\varrow{$\mathtt{\accentset{\to}{v}}$}
+
+\newcommand*{\mtx}[1]{\boldsymbol{#1}}
+\newcommand*{\set}[1]{\mathcal{#1}}
+\newcommand*{\card}[1]{|\set{#1}|}
+\newcommand*{\imaginary}{i}
+
+\newcommand{\addr}[1]{\\\url{#1}}
+\title{\appfmt{bib2gls}: a command line Java application to convert
+\filefmt{.bib} files to \filefmt{glossaries-extra.sty} resource
+files}
+\author{Nicola Talbot\addr{http://www.dickimaw-books.com/}}
+\date{\DTMusedate{moddate}}
+
+\makeatletter
+\begingroup
+ \renewcommand{\addr}[1]{}
+ \let\texorpdfstring\@secondoftwo
+ \DTMsetstyle{pdf}
+ \protected@edef\x{\endgroup
+ \noexpand\hypersetup{%
+ pdftitle={\@title},
+ pdfauthor={\@author}}%
+ \noexpand\pdfinfo{/CreationDate (\DTMuse{creation})
+ /ModDate (\DTMuse{moddate})
+ }%
+ }\x
+
+\newcommand*{\labelarg}[1]{%
+ {\def\@currentlabelname{\protect\longarg{#1}}\label{arg.#1}}%
+}
+\newcommand*{\argref}[1]{\nameref{arg.#1}}
+
+\newcommand*{\labelopt}[1]{%
+ {\def\dhyphen{\string\dhyphen\space}%
+ \protected@edef\@currentlabelname{\protect\csoptfmt{#1}}%
+ \def\dhyphen{-}\label{opt.#1}}%
+}
+\newrobustcmd*{\optref}[2][]{%
+ \nameref{opt.#2}%
+ \ifblank{#1}{}{\csoptfmt{\dequals\marg{#1}}}}
+
+\newcommand*{\labelatentry}[1]{%
+ {\def\@currentlabelname{\protect\atentry{#1}}\label{at.#1}}%
+}
+\newcommand*{\atentryref}[1]{\nameref{at.#1}}
+
+\newcommand*{\labelcs}[1]{%
+ {\def\@currentlabelname{\protect\cs{#1}}\label{cs.#1}}%
+}
+\newcommand*{\csref}[1]{\nameref{cs.#1}}
+
+\newcounter{phantom}
+\newcommand*{\plabel}[2][]{\refstepcounter{phantom}%
+ {\def\@currentlabelname{#1}\label{#2}}%
+}
+\newcommand{\plabelcs}[1]{\plabel[\protect\cs{#1}]{cs.#1}}
+
+\makeatother
+
+\begin{document}
+\maketitle
+\pagenumbering{alph}
+\thispagestyle{empty}
+
+\begin{abstract}
+The \bibgls\ command line application can be used to extract
+glossary information stored in a \filefmt{.bib} file and convert it
+into glossary entry definition commands that can be read using
+\styfmt{glossaries-extra}'s \csfmt{GlsXtrLoadResources} command. When used
+in combination with the \styopt{record} package option, \bibgls\
+can select only those entries that have been used in the document,
+as well as any dependent entries, which reduces the \TeX\ resources
+required by not defining unnecessary commands.
+
+Since \bibgls\ can also sort and collate the recorded locations
+present in the \filefmt{.aux} file, it can simultaneously by-pass the
+need to use \appfmt{makeindex} or \appfmt{xindy}, although \bibgls\
+can be used together with an external indexing application if required. (For
+example, if a custom \appfmt{xindy} rule is needed.)
+
+An additional build may be required to ensure the locations are
+up-to-date as the page-breaking may be slightly different on the
+first \LaTeX\ run due to the unknown references being replaced with
+?? which can be significantly shorter than the actual text produced
+when the reference is known.
+
+Note that \bibgls\ is a Java application, so it requires the
+Java Runtime Environment (at least JRE~7). Additionally,
+\styfmt{glossaries-extra} must be at least version 1.12.
+(Although the latest version is recommended.)
+This application was developed in response to the question
+\href{http://tex.stackexchange.com/q/342544}{Is there a program for
+managing glossary tags?} on \TeX\ on StackExchange. The \ext{bib}
+file can be managed in an application such as JabRef.
+
+If you already have a \ext{tex} file containing
+entry definitions using commands like \cs{newglossaryentry}
+then you can use the supplementary tool \appfmt{convertgls2bib}
+to convert the entries to the \ext{bib} format required by
+\bibgls. See \sectionref{sec:gls2bib} for further details.
+\end{abstract}
+
+\frontmatter
+
+\tableofcontents
+
+\mainmatter
+\chapter{Introduction}
+
+If you have extensively used the \styfmt{glossaries} or
+\styfmt{glossaries-extra} package, you may have found yourself
+creating a large \ext{tex} file containing many definitions that
+you frequently use in documents. This file can then simply be
+loaded using \cs{input} or \cs{loadglsentries}, but a large file
+like this can be difficult to maintain and if the document only
+actually uses a small proportion of those entries, the document
+build is unnecessarily slow due to the time and resources taken on
+defining the unwanted entries.
+
+The aim of \bibgls\ is to allow the entries to be stored in a
+\ext{bib} file, which can be maintained using a reference system
+such as JabRef. The document build process
+can now be analogous to that used with \app{bibtex} (or
+\appfmt{biber}), where only those entries that have been recorded in the
+document (and possibly their dependent entries) will be extracted
+from the \ext{bib} file. Since \bibgls\ can also perform
+hierarchical sorting and can collate location lists, it doubles as
+an indexing application, which means that the \app{makeglossaries}
+step can be skipped.
+
+You can't use \cs{glsaddall} with this method as that command works
+by iterating over all defined entries and calling
+\cs{glsadd}\margm{label}. On the first \LaTeX\ run there are no
+entries defined, so \cs{glsaddall} does nothing. If you want to
+select all entries, just use \optref[all]{selection} instead (which
+has the advantage over \cs{glsaddall} in that it doesn't create a
+redundant location for each entry).
+
+Note that \bibgls\ requires the extension package
+\sty{glossaries-extra} and can't be used with just the base
+\sty{glossaries} package, since it requires some of the extension
+commands. See the \sty{glossaries-extra} user manual for information
+on the differences between the basic package and the extended
+package, as some of the default settings are different.
+
+Since the information used by \bibgls\ is
+written to the \ext{aux} file, it's not possible to run \bibgls\
+through \TeX's shell escape while the \ext{aux} file is open for
+write access. (The \ext{aux} file is closed \emph{after} the end
+document hook, so it can't be deferred with \cs{AtEndDocument}.)
+This means that if you really want to run \bibgls\
+through \cs{write18} it must be done in the preamble with
+\cs{immediate}. For example:
+\begin{verbatim}
+\immediate\write18{bib2gls \jobname}
+\end{verbatim}
+As from version 1.14 of \sty{glossaries-extra}, this can be done
+automatically with the \styopt{automake} option if the \ext{aux}
+file exists. (Remember that this will require the shell escape to be
+enabled.)
+
+\section{Example Use}
+The glossary entries are stored in a \ext{bib} file. For
+example, the file \filefmt{entries.bib} might contain:
+\begin{verbatim}
+@entry{bird,
+ name={bird},
+ description = {feathered animal}
+}
+
+@abbreviation{html,
+ short="html",
+ long={hypertext markup language}
+}
+
+@symbol{v,
+ name={$\vec{v}$},
+ text={\vec{v}},
+ description={a vector}
+}
+
+@index{goose,plural="geese"}
+\end{verbatim}
+Here's an example document that uses this data:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ src={entries},% data in entries.bib
+ sort={en-GB}% sort according to 'en-GB' locale
+]
+
+\begin{document}
+\Gls{bird} and \gls{goose}.
+Symbol: $\gls{v}$.
+Abbreviation: \gls{html}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+If this document is called \filefmt{myDoc.tex}, the build
+process is:
+\begin{verbatim}
+pdflatex myDoc
+bib2gls myDoc
+pdflatex myDoc
+\end{verbatim}
+(This manual assumes \appfmt{pdflatex} for simplicity. Replace
+with \appfmt{latex}, \appfmt{xelatex} or \appfmt{lualatex} as
+appropriate.)
+
+You can have multiple instances of \cs{GlsXtrLoadResources}. For
+example:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[record,index,abbreviations,symbols]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ src={entries},% data in entries.bib
+ sort={en-GB},% sort according to 'en-GB' locale
+ match={entrytype={entry}},% only select @entry
+ type={main}% put these entries in the 'main' glossary
+]
+
+\GlsXtrLoadResources[
+ src={entries},% data in entries.bib
+ sort={en-GB},% sort according to 'en-GB' locale
+ match={entrytype={abbreviation}},% only select @abbreviation
+ type={abbreviations}% put these entries in the 'abbreviations' glossary
+]
+
+\GlsXtrLoadResources[
+ src={entries},% data in entries.bib
+ sort={letter-case},% case-sensitive letter sort
+ match={entrytype={symbol}},% only select @symbol
+ type={symbols}% put these entries in the 'symbols' glossary
+]
+
+\GlsXtrLoadResources[
+ src={entries},% data in entries.bib
+ sort={en-GB},% sort according to 'en-GB' locale
+ match={entrytype={index}},% only select @index
+ type={index}% put these entries in the 'index' glossary
+]
+
+\begin{document}
+\Gls{bird} and \gls{goose}.
+Symbol: $\gls{v}$.
+Abbreviation: \gls{html}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+
+Note that there's no need to called \app{xindy} or \app{makeindex}
+since \bibgls\ automatically sorts the entries and collates the locations
+after selecting the required entries from the \ext{bib} file and
+before writing the temporary file that's input with \cs{glsxtrresourcefile}
+(or the more convenient shortcut
+\cs{GlsXtrLoadResources}).\footnote{This document will mostly use
+the more convenient \cs{GlsXtrLoadResources}.} This
+means the entries are already defined in the correct order, and only
+those entries that are required in the document are defined, so
+\cs{printunsrtglossary} (or \cs{printunsrtglossaries}) may be used.
+(The \qtt{unsrt} part of the command name indicates that all
+defined entries should be listed in the order of definition from
+\sty{glossaries-extra}'s point of view.)
+
+If you additionally want to use an indexing application, such
+as \app{xindy}, you need the package option
+\styopt[alsoindex]{record} and use \cs{makeglossaries}
+and \cs{printglossary} (or the iterative \cs{printglossaries}) as usual.
+This requires a more complicated build process:
+\begin{verbatim}
+pdflatex myDoc
+bib2gls myDoc
+pdflatex myDoc
+makeglossaries myDoc
+pdflatex myDoc
+\end{verbatim}
+(The entries aren't defined until the second \LaTeX\ run, so the
+indexing files required by \app{makeindex} or \app{xindy} can't be
+created until then.)
+
+\section{Security}
+
+\TeX\ Live come with security settings
+\texttt{openin\_any} and \texttt{openout\_any} that, respectively,
+govern read and write file access (in addition to the operating
+system's file permissions). \bibgls\ uses \app{kpsewhich} to
+determine these values and honours them. MikTeX doesn't use these
+settings, so if these values are unset, \bibgls\ will default to
+\texttt{a} (any) for \texttt{openin\_any} and \texttt{p} (paranoid) for
+\texttt{openout\_any}.
+
+\section{Localisation}
+\label{sec:lang.xml}
+
+The messages produced by \bibgls\ are fetched from a resource file
+called \metafilefmt{bib2gls-}{lang}{.xml}, where \meta{lang} is a
+valid \gls{IETF} language tag.
+
+The appropriate file is searched for in the following order, where
+\meta{locale} is the operating system's locale or the value supplied
+by the \argref{locale} switch:
+\begin{enumerate}
+\item \meta{lang} exactly matches \meta{locale}.
+For example, my locale is \texttt{en-GB}, so \bibgls\ will first search
+for \filefmt{bib2gls-en-GB.xml}. This file doesn't exist, so it will
+try again.
+
+\item If \meta{locale} has an associated script, the
+next try is with \meta{lang} set to \meta{lang
+code}\texttt{-}\meta{script} where \meta{lang code} is the two
+letter ISO language code and \meta{script} is the script code.
+For example, if \meta{locale} is \texttt{sr-RS-Latn}
+then \bibgls\ will search for \filefmt{bib2gls-sr-Latn.xml} if
+\filefmt{bib2gls-sr-RS-Latn.xml} doesn't exist.
+
+\item The final attempt is with \meta{lang} set to just the two
+letter ISO language code. For example, \filefmt{bib2gls-sr.xml}.
+\end{enumerate}
+
+If there is no match, \bibgls\ will fallback on the English resource file
+\file{bib2gls-en.xml}.
+(Currently only \file{bib2gls-en.xml} exists as my language skills aren't up
+to translating it. Any volunteers who want to provide other language
+resource files would be much appreciated.)
+
+Note that if you use the \optref[true]{loc-prefix} option, the
+textual labels (\qt{Page} and \qt{Pages} in English) will be taken
+from the resource file. In the event that the loaded resource file
+doesn't match the document language, you will have to manually set
+the correct translation (in English, this would be
+\csopt[Page\dcomma Pages]{loc-prefix}). The default definition of
+\csref{bibglspassim} is also obtained from the resource file.
+
+\section{Manual Installation}
+
+If you are unable to install \bibgls\ through your \TeX\ package
+manager, you can install manually using the instructions below.
+Replace \meta{TEXMF} with the path to your local or home TEXMF tree
+(for example, \filefmt{~/texmf}).
+
+Copy the files provided to the following locations:
+\begin{itemize}
+\item \meta{TEXMF}\filefmt{/scripts/bib2gls/bib2gls.jar}
+(Java application.)
+\item \meta{TEXMF}\filefmt{/scripts/bib2gls/convertgls2bib.jar}
+(Java application.)
+\item \meta{TEXMF}\filefmt{/scripts/bib2gls/texparserlib.jar}
+(Java library.)
+\item \meta{TEXMF}\filefmt{/scripts/bib2gls/resources/bib2gls-en.xml}
+(English resource file.)
+\item \meta{TEXMF}\filefmt{/doc/support/bib2gls/bib2gls.pdf}
+(This document.)
+\end{itemize}
+
+If you are using a Unix-like system, there are also bash scripts
+provided called \file{bib2gls.sh} and \file{convertgls2bib.sh}.
+Either copy then directly to somewhere on your path without the \ext{sh}
+extension, for example:
+\begin{verbatim}
+cp bib2gls.sh ~/bin/bib2gls
+cp convertgls2bib.sh ~/bin/convertgls2bib
+\end{verbatim}
+or copy the files to
+\meta{TEXMF}\filefmt{/scripts/bib2gls/} and create a
+symbolic link to them called just \filefmt{bib2gls} and
+\filefmt{convertgls2bib} from somewhere on
+your path, for example:
+\begin{verbatim}
+cp bib2gls.sh ~/texmf/scripts/bib2gls/
+cp convertgls2bib.sh ~/texmf/scripts/bib2gls/
+cd ~/bin
+ln -s ~/texmf/scripts/bib2gls/bib2gls.sh bib2gls
+ln -s ~/texmf/scripts/bib2gls/convertgls2bib.sh convertgls2bib
+\end{verbatim}
+The \file{texparserlib.jar} file isn't an application but is a
+library used by both \file{bib2gls.jar} and
+\file{convertgls2bib.jar}, and so needs to be in the same class path.
+(The library is in a separate
+\href{https://github.com/nlct/texparser}{GitHub repository} as it's
+also used by some of my other applications.)
+
+Windows users can create a \ext{bat} file that works in a
+similar way to the bash scripts. To do this, create a file called
+\file{bib2gls.bat} that contains the following:
+\begin{verbatim}
+@ECHO OFF
+FOR /F "tokens=*" %%I IN ('kpsewhich --progname=bib2gls --format=texmfscripts
+bib2gls.jar') DO SET JARPATH=%%I
+java -Djava.locale.providers=CLDR,JRE -jar "%JARPATH%" %*
+\end{verbatim}
+Save this file to somewhere on your system's path.
+(Similarly for \filefmt{convertgls2bib}.) Note that \TeX\
+distributions for Windows usually convert \ext{jar} files to
+executables.
+
+You may need to refresh \TeX's database to ensure that
+\app{kpsewhich} can find the \ext{jar} files.
+
+To test that the application has been successfully installed, open a
+command prompt or terminal and run the following command:
+\begin{verbatim}
+bib2gls --version
+convertgls2bib --version
+\end{verbatim}
+This should display the version information for both applications.
+
+\chapter{\texorpdfstring{\TeX}{TeX}\ Parser Library}
+\label{sec:texparserlib}
+
+The \bibgls\ application requires the \TeX\ Parser Library
+\file{texparserlib.jar}\footnote{\url{https://github.com/nlct/texparser}} which is used to parse the \ext{aux}
+and \ext{bib} files.
+
+With the \argref{interpret} switch on (default), this library is
+also used to interpret the sort value when it contains
+a backslash \verb|\| or a dollar symbol \verb|$| or braces \verb|{|
+\verb|}| (and when the \optref{sort} option is not \optfmt{unsrt} or
+\optfmt{none} or \optfmt{use}). The other case is with
+\optref{set-widest} when determining the width of the \field{name}
+field. The \argref{no-interpret} switch will turn off this function,
+but the library will still be used to parse the \ext{aux} and
+\ext{bib} files.
+
+The \file{texparserlib.jar} library is not a
+\TeX\ engine and there are plenty of situations where it doesn't
+work. In particular, in this case it's being used in a fragmented
+context without knowing most of the packages used by the
+document\footnote{\bibgls\ can detect from the log file a small
+number of packages that the parser can support, such as
+\sty{pifonts}, \sty{wasysym}, \sty{amssymb}, \sty{stix}, \sty{mhchem}
+and \sty{bpchem}. There's also partial support for \sty{siunitx}'s
+\cs{si} command.}\ or any custom
+commands or environments provided within the document.
+
+\TeX\ syntax can be quite complicated and, in some cases, far too
+complicated for simple regular expressions. The library performs
+better than a simple pattern match, and that's the purpose of
+\file{texparserlib.jar} and why it's used by \bibgls\ (and by
+\appfmt{convertgls2bib}). When
+the \argref{debug} mode is on, any warnings or errors triggered by
+the \argref{interpret} mode will be written to the transcript
+prefixed with \texttt{texparserlib:} (the results of the conversions
+will be included in the transcript as informational messages
+prefixed with \texttt{texparserlib:} even with \argref{no-debug}).
+
+For example, suppose the \ext{bib} file includes:
+\begin{verbatim}
+@preamble{
+"\providecommand{\mtx}[1]{\boldsymbol{#1}}
+\providecommand{\set}[1]{\mathcal{#1}}
+\providecommand{\card}[1]{|\set{#1}|}
+\providecommand{\imaginary}{i}"}
+
+@entry{M,
+ name={{}$\mtx{M}$},
+ text={\mtx{M}},
+ description={a matrix}
+}
+
+@entry{v,
+ name={{}$\vec{v}$},
+ text={\vec{v}},
+ description={a vector}
+}
+
+@entry{S,
+ name={{}$\set{S}$},
+ text={\set{S}},
+ description={a set}
+}
+
+@entry{card,
+ name={{}$\card{S}$},
+ text={\card{S}},
+ description={the cardinality of the set $\set{S}$}
+}
+
+@entry{i,
+ name={{}$\imaginary$},
+ text={\imaginary},
+ description={square root of minus one ($\sqrt{-1}$)}
+}
+\end{verbatim}
+(The empty group at the start of the \field{name} fields
+protects against the possibility that the \catattr{glossname}
+category attribute might be set to \optfmt{firstuc}, which
+automatically converts the first letter of the name to
+upper case when displaying the glossary. See also
+\argref{mfirstuc-protection} and
+\argref{mfirstuc-math-protection}.)
+
+None of these entries have a \field{sort} field so the \field{name}
+is used. If the entry type had been \atentryref{symbol} instead,
+the fallback would be the entry's label.
+This means that with \entry{symbol} instead of \entry{entry}, and the default
+\optref[sort]{sort-field}, and with
+\optref[letter-case]{sort}, these entries will be defined in
+the order: \texttt{M}, \texttt{S}, \texttt{card}, \texttt{i}, \texttt{v} (since
+this is the case-sensitive letter order of the labels) whereas
+with \optref[letter-nocase]{sort-field}, the order will be:
+\texttt{card}, \texttt{i}, \texttt{M}, \texttt{S}, \texttt{v} (since this
+is the case-insensitive letter order of the labels).
+
+However, with \atentryref{entry}, the fallback field will
+be taken from the \field{name} which in the above example contains \TeX\ code, so
+\bibgls\ will use \file{texparserlib.jar} to interpret this code.
+The library has several different ways of writing the processed
+code. For simplicity, \bibgls\ uses the library's HTML output and then
+strips the HTML markup and trims any leading or trailing
+spaces. The library method that writes non-ASCII
+characters using \qtt{\&x\meta{hex};} markup is overridden
+by \bibgls\ to just write the Unicode character, which means
+that the letter-based sorting options will sort according
+to the integer value \meta{hex} rather than the string
+\qtt{\&x\meta{hex};}.
+
+The interpreter is first passed the code provided with
+\atentryref{preamble}:
+\begin{verbatim}
+\providecommand{\mtx}[1]{\boldsymbol{#1}}
+\providecommand{\set}[1]{\mathcal{#1}}
+\providecommand{\card}[1]{|\set{#1}|}
+\providecommand{\imaginary}{i}
+\end{verbatim}
+(unless \optref[false]{interpret-preamble}).
+This means that the provided commands are now recognised by the
+interpreter when it has to parse the fields later.
+
+In the case of the \texttt{M} entry in the example above, the
+code that's passed to the interpreter is:
+\begin{verbatim}
+{}$\mtx{M}$
+\end{verbatim}
+The transcript (\ext{glg}) file will show the results of the
+conversion:\footnote{The \argref{debug} mode will show additional
+information.}
+\begin{verbatim}
+texparserlib: {}$\mtx{M}$ -> M
+\end{verbatim}
+So the \field{sort} value for this entry is set to \qtt{M}. The font
+change (caused by math-mode and \cs{boldsymbol}) has been
+ignored. The sort value therefore consists of a single Unicode
+character 0x4D (Latin upper case letter \qtt{M}, decimal value 77).
+
+For the \texttt{v} entry, the code is:
+\begin{verbatim}
+{}$\vec{v}$
+\end{verbatim}
+The transcript shows:
+\begin{alltt}
+texparserlib: \marg{}\$\csfmt{vec}\marg{v}\$ -> \usebox\varrow
+\end{alltt}
+So the \field{sort} value for this entry is set to \qtt{\usebox\varrow},
+which consists of two Unicode characters 0x76
+(Latin lower case letter \qtt{v}, decimal value 118) and
+0x20D7 (combining right arrow above, decimal value 8407).
+
+For the \texttt{set} entry, the code is:
+\begin{verbatim}
+{}$\set{S}$
+\end{verbatim}
+The transcript shows:
+\begin{verbatim}
+texparserlib: {}$\set{S}$ -> S
+\end{verbatim}
+So the \field{sort} value for this entry is set to \qtt{S} (again
+ignoring the font change). This consists of a single Unicode
+character 0x53 (Latin upper case letter \qtt{S}, decimal value~83).
+
+For the \texttt{card} entry, the code is:
+\begin{verbatim}
+{}$\card{S}$
+\end{verbatim}
+The transcript shows:
+\begin{verbatim}
+texparserlib: {}$\card{S}$ -> |S|
+\end{verbatim}
+So the \field{sort} value for this entry is set to \qtt{|S|}
+(the \textbar\ characters from the definition of \csfmt{card} provided
+in \atentry{preamble} have been included, but the
+font change has been discarded). In this case the sort value
+consists of three Unicode characters 0x7C (vertical line, decimal
+value 124),
+0x53 (Latin upper case letter \qtt{S}, decimal value 83) and 0x7C again.
+If \optref[false]{interpret-preamble} had been used, \csfmt{card}
+wouldn't be recognised and would be discarded leaving just \qtt{S}
+as the sort value.
+
+For the \texttt{i} entry, the code is:
+\begin{verbatim}
+{}$\imaginary$
+\end{verbatim}
+The transcript shows:
+\begin{verbatim}
+texparserlib: {}$\imaginary$ -> i
+\end{verbatim}
+So the \field{sort} value for this entry is set to \qtt{i}.
+
+This means that in the case of the default \optref[sort]{sort-field} with
+\optref[letter-case]{sort}, these entries will be defined in
+the order: \texttt{M} ($\mtx{M}$), \texttt{S} ($\set{S}$),
+\texttt{i} ($\imaginary$), \texttt{v} ($\vec{v}$) and
+\texttt{card} ($\card{S}$).
+In this case, the entries have been sorted according to
+the character codes. If you run \bibgls\ with \argref{verbose}
+the decimal character codes will be included in the transcript.
+For this example:
+\begin{alltt}
+i -> 'i' [105]
+card -> '|S|' [124 83 124]
+M -> 'M' [77]
+S -> 'S' [83]
+v -> '\usebox\varrow' [118 8407]
+\end{alltt}
+
+The \argref{group} option (in addition to \argref{verbose})
+will place the letter group in
+parentheses before the character code list:
+\begin{alltt}
+i -> 'i' (i) [105]
+card -> '|S|' [124 83 124]
+M -> 'M' (M) [77]
+S -> 'S' (S) [83]
+v -> '\usebox\varrow' (v) [118 8407]
+\end{alltt}
+(Note that the \texttt{card} entry doesn't have a letter
+group since the vertical bar character isn't considered a
+letter.)
+
+If \optref[letter-nocase]{sort} is used instead then, after conversion
+by the interpreter, the sort values will all be changed to
+lower case. The order is now: \texttt{i} ($\imaginary$),
+\texttt{M} ($\mtx{M}$), \texttt{S} ($\set{S}$),
+\texttt{v} ($\vec{v}$) and \texttt{card} ($\card{S}$).
+The transcript (with \argref{verbose}) now shows
+\begin{alltt}
+i -> 'i' [105]
+card -> '|s|' [124 115 124]
+M -> 'm' [109]
+S -> 's' [115]
+v -> '\usebox\varrow' [118 8407]
+\end{alltt}
+With \argref{group} (in addition to \argref{verbose})
+the letter groups are again included:
+\begin{alltt}
+i -> 'i' (I) [105]
+card -> '|s|' [124 115 124]
+M -> 'm' (M) [109]
+S -> 's' (S) [115]
+v -> '\usebox\varrow' (V) [118 8407]
+\end{alltt}
+Note that the letter groups are upper case not lower case.
+Again the \texttt{card} entry doesn't have an associated
+letter group.
+
+If a locale-based sort is used, the ordering will follow the
+locale's alphabet rules. For example, with \optref[en]{sort}
+(English, no region or variant), the order becomes:
+\texttt{card} ($\card{S}$), \texttt{i} ($\imaginary$),
+\texttt{M} ($\mtx{M}$), \texttt{S} ($\set{S}$) and
+\texttt{v} ($\vec{v}$). The transcript (with \argref{verbose})
+shows the collation keys instead:
+\begin{alltt}
+i -> 'i' [0 92 0 0 0 0]
+card -> '|S|' [0 66 0 102 0 66 0 0 0 0]
+M -> 'M' [0 96 0 0 0 0]
+S -> 'S' [0 102 0 0 0 0]
+v -> '\usebox\varrow' [0 105 0 0 0 0]
+\end{alltt}
+Again the addition of the \argref{group} switch will show
+the letter groups.\footnote{For more information on collation keys see the
+\href{http://docs.oracle.com/javase/8/docs/api/java/text/CollationKey.html}{CollationKey}
+class in Java's API.}
+
+Suppose I add a new symbol to my \ext{bib} file:
+\begin{verbatim}
+@symbol{angstrom,
+ name={\AA},
+ description={\AA ngstr\"om}
+}
+\end{verbatim}
+and I also use this entry in the document. Then with
+\optref[en]{sort}, the order is: \texttt{card} ($\card{S}$),
+\texttt{angstrom} (\AA), \texttt{i} ($\imaginary$), \texttt{M}
+($\mtx{M}$), \texttt{S} ($\set{S}$), and \texttt{v} ($\vec{v}$).
+The \argref{group} switch shows that the \texttt{angstrom} entry
+(\AA) has been placed in the \qt{A} letter group.
+
+However, if I change the locale to \optref[sv]{sort}, the
+\texttt{angstrom} entry is moved to the end of the list and the
+\argref{group} switch shows that it's been placed in the \qt{\AA}
+letter group.
+
+If you are using Java~8, you can set the
+\texttt{java.locale.providers} property to \texttt{CLDR,JRE} to use
+the Common Locale Data Repository, which has more extensive
+support for locales than the native Java Runtime Environment.
+This isn't available for Java~7, and should be enabled by default
+for the proposed Java~9.
+
+\chapter{Command Line Options}
+\label{sec:switches}
+
+\edef\resetsecnumdepth{\noexpand\setcounter{secnumdepth}{\arabic{secnumdepth}}}
+\setcounter{secnumdepth}{0}
+
+The syntax of \bibgls\ is:
+\begin{alltt}
+bib2gls \oargm{options} \meta{filename}
+\end{alltt}
+where \meta{filename} is the name of the \ext{aux} file. (The
+extension may be omitted.) Only one \meta{filename} is permitted.
+
+Available options are listed below.
+
+\section{\longarg{help} (or \shortarg{h})}
+\labelarg{help}
+
+Display the help message and quit.
+
+\section{\longarg{version} (or \shortarg{v})}
+\labelarg{version}
+
+Display the version information and quit.
+
+\section{\longarg{debug} \oargm{n}}
+\labelarg{debug}
+
+Switch on debugging mode. If \meta{n} is present, it must be a
+non-negative integer indicating the debugging level. If omitted 1 is
+assumed. This option also switches on the verbose mode. A value of 0
+is equivalent to \longargfmt{no-debug}.
+
+\section{\longarg{no-debug} (or \longarg{nodebug})}
+\labelarg{no-debug}
+
+Switches off the debugging mode.
+
+\section{\longarg{verbose}}
+\labelarg{verbose}
+
+Switches on the verbose mode. This writes extra information to the
+terminal and transcript file.
+
+\section{\longarg{no-verbose} (or \longarg{noverbose})}
+\labelarg{no-verbose}
+
+Switches off the verbose mode. This is the default behaviour.
+Some messages are written to the terminal. To completely suppress
+all messages (except errors), switch on the silent mode.
+For additional information messages, switch on the verbose mode.
+
+\section{\longarg{silent}}
+\labelarg{silent}
+
+Suppresses all messages except for errors that would normally be
+written to the terminal. Warnings and informational messages are
+written to the transcript file, which can be inspected afterwards.
+
+\section{\longarg{locale} \meta{lang} (or \shortarg{l} \meta{lang})}
+\labelarg{locale}
+
+Specify the preferred \langxml, where \meta{lang} is a valid \gls{IETF} language tag.
+This option requires an appropriate \metafilefmt{bib2gls-}{lang}{.xml}
+resource file otherwise \bibgls\ will fallback on English.
+
+\section{\longarg{log-file} \meta{filename} (or \shortarg{t}
+\meta{filename})}
+\labelarg{log-file}
+
+Sets the name of the transcript file. By default, the name is the
+same as the \ext{aux} file but with a \ext{glg} extension. Note that
+if you use \bibgls\ in combination with \app{xindy} or
+\app{makeindex}, you will need to change the transcript file name to
+prevent interference.
+
+\section{\longarg{dir} \meta{dirname} (or \shortarg{d}
+\meta{dirname})}
+\labelarg{dir}
+
+By default \bibgls\ assumes that the output files should be written
+in the current working directory. The input \ext{bib} files are assumed to be
+either in the current working directory or on \TeX's path (in which
+case \app{kpsewhich} will be used to find them).
+
+If your \ext{aux} file isn't in the current working directory (for
+example, you have run \TeX\ with \shortargfmt{output-directory})
+then you need to take care how you invoke \bibgls.
+
+Suppose I have a file called \filefmt{test-entries.bib} that
+contains my entry definitions and a document called
+\filefmt{mydoc.tex} that selects the \ext{bib} file using:
+\begin{verbatim}
+\GlsXtrLoadResources[src={test-entries}]
+\end{verbatim}
+(\filefmt{test-entries.bib} is in the same directory as
+\filefmt{mydoc.tex}).
+If I compile this document using
+\begin{verbatim}
+pdflatex -output-directory tmp mydoc
+\end{verbatim}
+then the auxiliary file \filefmt{mydoc.aux} will be written to the
+\filefmt{tmp} sub-directory. The resource information is listed in
+the \ext{aux} file as
+\begin{verbatim}
+\glsxtr@resource{src={test-entries}}{mydoc}
+\end{verbatim}
+If I run \bibgls\ from the \filefmt{tmp} directory, then it won't
+be able to find the \filefmt{test-entries.bib} file (since it's in
+the parent directory).
+
+If I run \bibgls\ from the same directory as \filefmt{mydoc.tex}
+using
+\begin{verbatim}
+bib2gls tmp/mydoc
+\end{verbatim}
+then the \ext{aux} file is found and the transcript file is
+\filefmt{tmp/mydoc.glg} (since the default is the same as the
+\ext{aux} file but with the extension changed to \ext{glg}) but the
+output file \filefmt{mydoc.glstex} will be written to the current
+directory.
+
+This works fine from \TeX's point of view as it can find the
+\ext{glstex} file, but it may be that you'd rather the \ext{glstex}
+file was tidied away into the \filefmt{tmp} directory along with all
+the other files. In this case you need to invoke \bibgls\ with the
+\longarg{dir} or \shortarg{d} option:
+\begin{verbatim}
+bib2gls -d tmp mydoc
+\end{verbatim}
+
+\section{\longarg{interpret}}
+\labelarg{interpret}
+
+Switch on the interpreter mode (default). See \sectionref{sec:texparserlib}
+for more details.
+
+\section{\longarg{no-interpret}}
+\labelarg{no-interpret}
+
+Switch off the interpreter mode. See \sectionref{sec:texparserlib}
+for more details.
+
+\section{\longarg{mfirstuc-protection} (or \shortarg{u})}
+\labelarg{mfirstuc-protection}
+
+Commands like \cs{Gls} use \cs{makefirstuc} provided by the
+\sty{mfirstuc} package. This command has limitations and one of the
+things that can break it is the use of a referencing command
+at the start of its argument. The \sty{glossaries-extra} package has
+more detail about the problem in the \qt{Nested Links} section of
+the user manual. If a glossary field starts with one of these
+problematic commands, the recommended method (if the command can't
+be replaced) is to insert an empty group in front of it.
+
+For example, the following definition
+\begin{verbatim}
+\newabbreviation{shtml}{shtml}{\glsps{ssi} enabled \glsps{short}{html}}
+\end{verbatim}
+will cause a problem for \verb|\Gls{shtml}| on first use.
+
+The above example, would be written in a \ext{bib} file as:
+\begin{verbatim}
+@abbreviation{shtml,
+ short={shtml},
+ long={\glsps{ssi} enabled \glsps{html}}
+}
+\end{verbatim}
+
+With the \longarg{mfirstuc-protection} switch on (the default
+behaviour), \bibgls\ will automatically insert an empty group at the
+start of the \field{long} field to guard against this problem. A
+warning will be written to the transcript.
+
+\section{\longarg{no-mfirstuc-protection}}
+\labelarg{no-mfirstuc-protection}
+
+Switches off the \sty{mfirstuc} protection mechanism described
+above.
+
+\section{\longarg{mfirstuc-math-protection}}
+\labelarg{mfirstuc-math-protection}
+
+This works in the same way as \argref{mfirstuc-protection} but
+guards against fields starting with inline maths
+(\verb|$|\ldots\verb|$|). For example, if the \field{name} field
+starts with \verb|$x$| and the glossary style automatically tries to
+convert the first letter of the name to upper case, then this will
+cause a problem.
+
+With \longarg{mfirstuc-math-protection} set, \bibgls\ will
+automatically insert an empty group at the start of the field and
+write a warning in the transcript. This setting is on by default.
+
+\section{\longarg{no-mfirstuc-math-protection}}
+\labelarg{no-mfirstuc-math-protection}
+
+Switches off the above.
+
+\section{\longarg{nested-link-check} \meta{list}\argor\texttt{none}}
+\labelarg{nested-link-check}
+
+By default, \bibgls\ will parse certain fields for potential nested links.
+(See the section \qt{Nested Links} in the \sty{glossaries-extra}
+user manual.)
+
+The default set of fields to check are: \field{name}, \field{text},
+\field{plural}, \field{first}, \field{firstplural}, \field{long},
+\field{longplural}, \field{short}, \field{shortplural} and
+\field{symbol}.
+
+You can change this set of fields using
+\longarg{nested-link-check} \meta{value} where \meta{value} may be
+\optfmt{none} (don't parse any of the fields) or a comma-separated
+list of fields to be checked.
+
+\section{\longarg{no-nested-link-check}}
+\labelarg{no-nested-link-check}
+
+Equivalent to \longarg{nested-link-check} \optfmt{none}.
+
+\section{\longarg{shortcuts} \meta{value}}
+\labelarg{shortcuts}
+
+Some entries may reference another entry within a field, using
+commands like \cs{gls}, so \bibgls\ parses the fields for these
+commands to determine dependent entries to allow them to be selected
+even if they haven't been used within the document.
+The \styopt{shortcuts} package option provided by
+\styfmt{glossaries-extra} defines various synonyms, such as \cs{ac}
+which is equivalent to \cs{gls}. By default the value of the
+\styopt{shortcuts} option will be picked up by \bibgls\ when parsing the
+\ext{aux} file. This then allows \bibgls\ to additionally search for
+those shortcut commands while parsing the fields.
+
+You can override the \styopt{shortcuts} setting using
+\longarg{shortcuts} \meta{value} (where \meta{value} may take
+any of the allowed values for the \styopt{shortcuts} package option),
+but in general there is little need to use this switch.
+
+\section{\longarg{map-format} \meta{format1}:\meta{format2}
+or \shortarg{m} \meta{format1}:\meta{format2}}
+\labelarg{map-format}
+
+This sets up the rule of precedence for partial location
+matches (see \sectionref{sec:locationopts}). For example,
+\begin{verbatim}
+bib2gls --map-format "emph:hyperbf" mydoc
+\end{verbatim}
+This essentially means that if there's a record conflict
+involving \texttt{emph}, try replacing \texttt{emph} with
+\texttt{hyperbf} and see if that resolves the conflict.
+
+Note that if the conflict includes a range formation, the
+range takes precedence.
+
+If you have multiple mappings, you can either use a single
+\longarg{map-format} with a comma separated list of
+\meta{format1}\dcolon\meta{format2} or you can have multiple instances of
+\longarg{map-format} \meta{format1}\dcolon\meta{format2}.
+
+Note that the mapping tests are applied as the records are
+read. For example, suppose the records are listed in the \ext{aux}
+file as:
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{emph}{3}
+\glsxtr@record{gls.sample}{}{page}{hypersf}{3}
+\glsxtr@record{gls.sample}{}{page}{hyperbf}{3}
+\end{verbatim}
+and \bibgls\ is invoked with
+\begin{verbatim}
+bib2gls --map-format "emph:hyperbf,hypersf:hyperit" mydoc
+\end{verbatim}
+or
+\begin{verbatim}
+bib2gls --map-format emph:hyperbf --map-format hypersf:hyperit mydoc
+\end{verbatim}
+then \bibgls\ will process these records as follows:
+\begin{enumerate}
+\item Accept the first record (\texttt{emph}) since there's
+currently no conflict. (This is the first record for page~3 for the
+entry given by \texttt{gls.sample}.)
+\item The second record (\texttt{hypersf}) conflicts
+with the existing record (\texttt{emph}). Neither has
+the format \texttt{glsnumberformat} or \texttt{glsignore} so \bibgls\ consults
+the mappings provided by \longargfmt{map-format}.
+\begin{itemize}
+\item The \texttt{hypersf} format (from the new record) is mapped to \texttt{hyperit},
+so \bibgls\ checks if the existing record
+has this format. In this case it doesn't (the format is
+\texttt{emph}). So \bibgls\ moves onto the next test:
+
+\item The \texttt{emph} format (from the existing record) is mapped to \texttt{hyperbf},
+so \bibgls\ checks if the new record has this format.
+In this case it doesn't (the format is \texttt{hypersf}).
+
+Since the provided mappings haven't resolved this conflict,
+the new record is discarded with a warning. Note that there's
+no look ahead to the next record. (There may be other
+records for other entries also used on page~3 interspersed between these records.)
+\end{itemize}
+\item The third record (\texttt{hyperbf}) conflicts
+with the existing record (\texttt{emph}). Neither has
+the format \texttt{glsnumberformat} or \texttt{glsignore} so \bibgls\ again consults
+the mappings provided by \longargfmt{map-format}.
+\begin{itemize}
+\item The new record's \texttt{hyperbf} format has no mapping provided,
+so \bibgls\ moves onto the next test:
+
+\item The existing record's \texttt{emph} format has a mapping
+provided (\texttt{hyperbf}). This matches the new record's format,
+so the new record takes precedence.
+
+This means that the location list ends up with the \texttt{hyperbf}
+location for page~3.
+\end{itemize}
+\end{enumerate}
+
+If, on the other hand, the mappings are given as
+\begin{verbatim}
+--map-format "emph:hyperit,hypersf:hyperit,hyperbf:hyperit"
+\end{verbatim}
+then all the three conflicting records (\texttt{emph},
+\texttt{hypersf} and \texttt{hyperbf}) will end up being replaced
+by a single record with \texttt{hyperit} as the format.
+
+Multiple conflicts will typically be rare as there's usually little
+reason for more than two or three different location formats within
+the same list. (For example, \texttt{glsnumberformat} as the default
+and \texttt{hyperbf} or \texttt{hyperit} for a primary reference.)
+
+\section{\longarg{group}}
+\labelarg{group}
+
+The \styfmt{glossaries-extra} \styopt{record} package option automatically creates a new field
+called \field{group}. If the \longarg{group} switch is used then, when
+sorting, \bibgls\ will try to determine the letter group for each
+entry and add it to the \field{group} field. (Some \optref{sort}
+options ignore this setting.) This value will be picked up by
+\cs{printunsrtglossary} if group headings are required (for
+example with the \glostyle{indexgroup} style). If you're not using
+a glossary style that displays the group headings, there's no need
+to use this switch. Note that this switch doesn't automatically
+select an appropriate glossary style.
+
+There are four basic types of groups:
+\begin{itemize}
+\item \keyword{letter groups} where the group title indicates the
+first letter of all the sort values within that group.
+The group title is set with \csref{bibglslettergroup}.
+
+\item \keyword{non-letter groups} (or \keyword{symbol groups})
+where the first characters of all the sort values within that group
+are non-alphabetical. The group title is set with \csref{bibglsothergroup}.
+
+\item \keyword{number groups} for all entries sorted by a numeric
+comparison (such as \optref[integer]{sort}).
+The group title is set with \csref{bibglsnumbergroup}.
+
+\item \keyword{custom groups} for all entries that have had the
+group title explicitly set using the \optref[\meta{title}]{group}
+resource option.
+\end{itemize}
+
+The letter group titles will typically have the first character
+converted to upper case for the rule-based comparisons
+(\optref[custom]{sort} and \optref[\meta{lang-tag}]{sort}). A
+\qt{letter} may not necessarily be a single character (depending on
+the sort rule), but may be composed of multiple characters, such as
+a \keyword{digraph} (two characters) or \keyword{trigraph} (three
+characters).
+
+For example, if the sort rule recognises the digraph \qt{dz} as a
+letter, then it will be converted to \qt{Dz} for the group title.
+There are some exceptions to this. For example, the Dutch digraph
+\qt{ij} should be \qt{IJ} rather than \qt{Ij}. This is indicated
+by the following line in the \langxml:
+\begin{verbatim}
+<entry key="grouptitle.case.ij">IJ</entry>
+\end{verbatim}
+If there isn't a \texttt{grouptitle.case.\meta{lc}} key (where
+\meta{lc} is the lower case version), then only the first character
+will be converted to upper case otherwise the value supplied by the
+resource file is used. This resource key is only checked for
+the locale and custom rule comparisons. If the initial part of
+the sort value isn't recognised as a letter according to the sort rule,
+then the entry will be in a non-letter group (even if the character
+is alphabetical).
+
+The locale-independent character code comparisons (such as
+\optref[letter-nocase]{sort}) only select the first character of the
+sort value for the group. If the character is
+alphabetical\footnote{according to Java's
+\texttt{Character.isAlphabetic(int)} method} then it will be a
+letter group otherwise it's a non-letter group. The
+case-insensitive ordering (such as \optref[letter-nocase]{sort})
+will convert the letter group character to upper case. The
+case-sensitive ordering (such as \optref[letter-case]{sort}) won't
+change the case.
+
+Glossary styles with navigational links to groups (such as
+\glostyle{indexhypergroup}) require an extra run for the ordinary
+\csfmt{makeglossaries} and \csfmt{makenoidxglossaries} methods. For
+example, for the document \filefmt{myDoc.tex}:
+\begin{verbatim}
+pdflatex myDoc
+makeglossaries myDoc
+pdflatex myDoc
+pdflatex myDoc
+\end{verbatim}
+On the first \appfmt{pdflatex} call, there's no glossary. On the second
+\appfmt{pdflatex}, there's a glossary but the glossary must be
+processed to find the group information, which is written to the
+\ext{aux} file as
+\begin{alltt}
+\cs{@gls@hypergroup}\margm{type}\margm{group id}
+\end{alltt}
+The third \appfmt{pdflatex} reads this information and is then able
+to create the navigation links.
+
+With \bibgls, if the \optfmt{type} is provided (through the
+\field{type} field or via options such as \optref{type} and
+\optref{dual-type}) then this information can be determined when
+\bibgls\ is ready to write the \ext{glstex} file, which means that
+the extra \LaTeX\ run isn't necessary.
+
+For example:
+\begin{verbatim}
+\documentclass{article}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record,abbreviations,style=indexhypergroup]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries},% data in entries.bib
+ type={main}% put these entries in the 'main' glossary
+]
+
+\GlsXtrLoadResources[src={abbrvs},% data in abbrvs.bib
+ type={abbreviations}% put these entries in the 'abbreviations' glossary
+]
+\end{verbatim}
+Here the \optref{type} is set and \bibgls\ can detect that
+\sty{hyperref} has been loaded, so if the \longargfmt{group} switch
+is used, then the group hyperlinks can be set (using
+\csref{bibglshypergroup}). This means that the build process is
+just:
+\begin{verbatim}
+pdflatex myDoc
+bibtex --group myDoc
+pdflatex myDoc
+\end{verbatim}
+Note that this requires \sty{glossaries} v4.32+. If your version of
+\sty{glossaries} is too old then \bibgls\ can't override
+the default behaviour of \sty{glossary-hypernav}'s
+\cs{glsnavhypertarget}.
+
+If \sty{hyperref} isn't loaded or the \longargfmt{group} switch
+isn't used or the \field{type} isn't set or your version of
+\sty{glossaries} is too old, then the information isn't saved.
+
+For example:
+\begin{verbatim}
+\documentclass{article}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record,abbreviations,style=indexhypergroup]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries}]% data in entries.bib
+
+\GlsXtrLoadResources[src={abbrvs}]% data in abbrvs.bib
+\end{verbatim}
+This requires the build process:
+\begin{verbatim}
+pdflatex myDoc
+bibtex --group myDoc
+pdflatex myDoc
+pdflatex myDoc
+\end{verbatim}
+because the group hyperlink information can't be determined by
+\bibgls, so it's best to always set the \optfmt{type} if you want
+hyper-group styles, and make sure you have an up-to-date version of
+\sty{glossaries} (and \sty{glossaries-extra}).
+
+\section{\longarg{no-group}}
+\labelarg{no-group}
+
+Don't use the \field{group} field. (Default.)
+The glossary won't have groups even if a group style, such as
+\glostyle{indexgroup}, is used.
+
+\section{\longarg{tex-encoding} \meta{name}}
+\labelarg{tex-encoding}
+
+\bibgls\ tries to determine the character encoding to use for the
+output files. If the document has loaded the \sty{inputenc} package then
+\bibgls\ can obtain the value of the encoding from the
+\ext{aux} file. This then needs to be converted to a name
+recognised by Java. For example, \texttt{utf8} will be mapped to
+\texttt{UTF-8}. If the \sty{fontspec} package has been loaded,
+\sty{glossaries-extra} will assume the encoding is \texttt{utf8} and
+write that value to the \ext{aux} file.
+
+If neither package has been loaded, \bibgls\ will assume the
+operating system's default encoding. If this is incorrect or if
+\bibgls\ can't work out the appropriate mapping then you can specify
+the correct encoding using \longargfmt{tex-encoding} \meta{name}
+where \meta{name} is the encoding name.
+
+\section{\longarg{trim-fields}}
+\labelarg{trim-fields}
+
+Trim leading and trailing spaces from field values. For example,
+if the \ext{bib} file contains:
+\begin{verbatim}
+@entry{sample,
+ name = { sample },
+ description = {
+ an example
+ }
+}
+\end{verbatim}
+This will cause spurious spaces. Using \longarg{trim-fields} will
+automatically trim the values before writing the \ext{glstex} file.
+
+\section{\longarg{no-trim-fields}}
+\labelarg{no-trim-fields}
+
+Don't trim any leading or trailing spaces from field values.
+This is the default setting.
+
+\chapter{\ext{bib} Format}
+\label{sec:bib}
+
+\bibgls\ recognises certain entry types. Any unrecognised types will
+be ignored and a warning will be written to the transcript file.
+Entries are defined in the usual \ext{bib} format:
+\begin{alltt}
+@\meta{entry-type}\marg{\meta{id},
+ \meta{field-name-1} = \margm{text},
+ ...
+ \meta{field-name-n} = \margm{text}
+}
+\end{alltt}
+where \meta{entry-type} is the entry type (listed below),
+\meta{field-name-1}, \ldots, \meta{field-name-n} are the field names
+(same as the keys available with \cs{newglossaryentry}) and
+\meta{id} is a unique label. The label can't contain any spaces or
+commas. In general it's best to stick with alpha-numeric labels.
+The field values may be delimited by braces \margm{text} or
+double-quotes \texttt{"\meta{text}"}.
+
+\bibgls\ allows you to insert prefixes to the labels when the data
+is read through the \optref{label-prefix} option. Remember to use
+these prefixes when you reference the entries in the document, but
+don't include them when you reference them in the \ext{bib} file.
+There are some special prefixes that have a particular meaning to
+\bibgls: \qt{\idprefix{dual}} and \qt{\idprefix{ext\meta{n}}} where
+\meta{n} is a positive integer. In the first case,
+\idprefix{dual} references the dual element of a dual entry (see
+\atentryref{dualentry}). This prefix will be replaced by the value of
+the \csopt{dual-prefix} option. The \idprefix{ext\meta{n}} prefix
+is used to reference an entry from a different set of resources
+(loaded by another \cs{GlsXtrLoadResources} command). This prefix is
+replaced by the corresponding element of the list supplied by
+\optref{ext-prefixes}.
+
+In the event that the \field{sort} value falls back on the label,
+the original label supplied in the \ext{bib} file is used, not the
+prefixed label.
+
+Avoid non-ASCII characters in the \meta{id} if your document uses the
+\sty{inputenc} package.
+You can set the character encoding in the \ext{bib} file using:
+\begin{alltt}
+\% Encoding: \meta{encoding-name}
+\end{alltt}
+where \meta{encoding-name} is the name of the character encoding.
+For example:
+\begin{verbatim}
+% Encoding: UTF-8
+\end{verbatim}
+You can also set the encoding using the \optref{charset} option,
+but it's simpler to include the above comment on the first line of
+the \ext{bib} file. (This comment is also searched for by JabRef
+to determine the encoding, so it works for both applications.)
+If you don't use either method \bibgls\ will
+have to search the entire \ext{bib} file, which is inefficient and
+you may end up with a mismatched encoding.
+
+Each entry type may have required fields and optional fields. For the
+optional fields, any key recognised by \cs{newglossaryentry} may be
+used as a field. However, note that if you add
+any custom keys in your document using \cs{glsaddkey} or \cs{glsaddstoragekey}, those
+commands must be placed before the first use of
+\cs{GlsXtrLoadResources}.
+
+Any unrecognised fields will be ignored.
+This is more convenient than using \cs{input} or \cs{loadglsentries}, which
+requires all the keys used in the file to be defined, regardless of
+whether or not you actually need them in the document.
+
+If an optional field is missing and \bibgls\ needs to access it for
+some reason (for example, for sorting), \bibgls\ will try to
+fallback on another value. The actual fallback value depends on the
+entry type.
+
+Other entries can be cross-referenced using the \field{see},
+\field{seealso} or \field{alias} fields or
+by using commands like \cs{gls} or \cs{glsxtrp} in any of the
+recognised fields. These will automatically be selected if the
+\csopt{selection} setting includes dependencies, but you may need to
+rebuild the document to ensure the location lists are correct.
+If an entry has the \field{see} field set, any instance of
+\cs{glssee} in the document for that entry will be ignored,
+otherwise the reference from \cs{glssee} will be transferred to the
+\field{see} field (provided you have at least v1.14 of
+\sty{glossaries-extra}). In general, it's best just to use the \field{see}
+field and not use \cs{glssee}.
+
+The \field{seealso} key was only added to \sty{glossaries-extra}
+v1.16, but this field may be used with \bibgls\ even if you only
+have version 1.14 or 1.15. If the key isn't available,
+\texttt{seealso=\margm{xr-list}} will be treated as
+\texttt{see=\marg{[\cs{seealsoname}]\meta{xr-list}}} (the resource
+option \optref{seealso} won't have an effect). You can't use both
+\field{see} and \field{seealso} for the same entry with \bibgls.
+Note that the \field{seealso} field doesn't allow for the optional
+\oargm{tag} part. If you need a different tag, either use \field{see}
+or change the definition of \cs{seealsoname} or
+\cs{glsxtruseseealsoformat}. Note that, unless you are using
+\app{xindy}, \cs{glsxtrindexseealso} just does
+\cs{glssee}[\cs{seealsoname}], and so will be treated as \field{see}
+rather than \field{seealso} by \bibgls. Again, it's better to just
+use the \field{seealso} field directly.
+
+\section{\atentry{string}}
+\labelatentry{string}
+
+The standard \atentry{string} is available and can be used to define
+variables that may be used in field values.
+For example:
+\begin{verbatim}
+@string{ssi={server-side includes}}
+@string{html={hypertext markup language}}
+
+@abbreviation{shtml,
+ short="shtml",
+ long= ssi # " enabled " # html,
+ see={ssi,html}
+}
+
+@abbreviation{html,
+ short ="html",
+ long = html
+}
+
+@abbreviation{ssi,
+ short="ssi",
+ long = ssi
+}
+\end{verbatim}
+
+\section{\atentry{preamble}}
+\labelatentry{preamble}
+
+The standard \atentry{preamble} is available and can be used to
+provide command definitions used within field values.
+For example:
+\begin{verbatim}
+@preamble{"\providecommand{\mtx}[1]{\boldsymbol{#1}}"}
+
+@entry{matrix,
+ name={matrix},
+ plural={matrices},
+ description={rectangular array of values, denoted $\mtx{M}$}
+}
+\end{verbatim}
+
+The \TeX\ parser library used by \bibgls\ will parse the contents of
+\atentry{preamble} before trying to interpret the field value used
+as a fallback when \field{sort} is omitted (unless
+\optref[false]{interpret-preamble} is set in the resource options).
+For example:
+\begin{verbatim}
+@preamble{"\providecommand{\set}[1]{\mathcal{#1}}
+\providecommand{\card}[1]{|\set{#1}|}"}
+
+@entry{S,
+ name={{}$\set{S}$},
+ text={\set{S}},
+ description={a set}
+}
+@entry{card,
+ name={{}$\card{S}$},
+ text={\card{S}},
+ description={the cardinality of \gls{S}}
+}
+\end{verbatim}
+Neither entry has the \field{sort} field, so \bibgls\ has to fall
+back on the \field{name} field and, since this contains the special
+characters \verb|\| \verb|$| \verb|{| and \verb|}|, the \TeX\ parser
+library is used to interpret it. The definitions provided by
+\atentry{preamble} allow \bibgls\ to deduce that the \field{sort}
+value of the \texttt{S} entry is just \texttt{S} and the \field{sort}
+value of the \texttt{card} entry is \verb"|S|" (see
+\sectionref{sec:texparserlib}).
+
+What happens if you also need to use these commands in the document?
+The definitions provided in \atentry{preamble} won't be available
+until the \ext{glstex} file has been created, which means the
+commands won't be defined on the first \LaTeX\ run.
+
+There are several approaches:
+\begin{enumerate}
+\item Just define the commands in the document. This means the
+commands are available, but \bibgls\ won't be able to correctly
+interpret the \field{name} fields.
+
+\item Define the commands in both the document and in
+\atentry{preamble}. For example:
+\begin{verbatim}
+\newcommand{\set}[1]{\mathcal{#1}}
+\newcommand{\card}[1]{|\set{#1}|}
+\GlsXtrLoadResources[src={my-data}]
+\end{verbatim}
+Alternatively:
+\begin{verbatim}
+\GlsXtrLoadResources[src={my-data}]
+\providecommand{\set}[1]{\mathcal{#1}}
+\providecommand{\card}[1]{|\set{#1}|}
+\end{verbatim}
+If the provided definitions match those given in the \ext{bib} file,
+there's no difference. If they don't match then in the first example
+the document definitions will take precedence (but the interpreter
+will use the \atentry{preamble} definitions) and in the second
+example the \atentry{preamble} definitions will take precedence.
+
+\item Make use of \cs{glsxtrfmt} provided by
+\sty{glossaries-extra}\footnote{Introduced in version 1.12.}\ which
+allows you to store the name of the formatting command in a field.
+The default is the \field{user1} field, but this can be changed to
+another field by redefining \cs{GlsXtrFmtField}.
+
+The \ext{bib} file can now look like this:
+\begin{verbatim}
+@preamble{"\providecommand{\set}[1]{\mathcal{#1}}
+\providecommand{\card}[1]{|\set{#1}|}"}
+
+@symbol{S,
+ name={{}$\set{S}$},
+ text={\set{S}},
+ user1={set},
+ description={a set}
+}
+@symbol{cardS,
+ name={{}$\card{S}$},
+ text={\card{S}},
+ user1={card},
+ description={the cardinality of \gls{S}}
+}
+\end{verbatim}
+Within the document, you can format \meta{text} using the formatting
+command provided in the \field{user1} field with:
+\begin{definition}
+\cs{glsxtrfmt}\oargm{options}\margm{label}\margm{text}
+\end{definition}
+(which internally uses \cs{glslink}) or
+\begin{definition}
+\cs{glsxtrentryfmt}\margm{label}\margm{text}
+\end{definition}
+which just applies the appropriate formatting command to
+\meta{text}. If the entry given by \meta{label} hasn't been defined,
+then this just does \meta{text} and a warning is issued. (It
+just does \meta{text} without a warning if the field hasn't been set.)
+The \meta{options} are as for \cs{glslink} but \cs{glslink} will
+actually be using
+\begin{alltt}
+\cs{glslink}\oarg{\meta{def-options},\meta{options}}\margm{label}\marg{\csfmt{}\meta{csname}\margm{text}}
+\end{alltt}
+where the default options \meta{def-options} are given by
+\cs{GlsXtrFmtDefaultOptions}. The default definition of this is
+just \texttt{noindex} which suppresses the automatic indexing or
+recording action. (See the \sty{glossaries-extra} manual
+for further details.)
+
+This means that the document doesn't need to actually provide
+\verb|\set| or \verb|\card| but can instead use, for example,
+\begin{alltt}
+\cs{glsxtrfmt}\marg{S}\marg{A}
+\cs{glsxtrentryfmt}\marg{cardS}\marg{B}
+\end{alltt}
+instead of
+\begin{verbatim}
+\set{A}
+\card{B}
+\end{verbatim}
+The first \LaTeX\ run will simply ignore the formatting and produce
+a warning.
+
+Since this is a bit cumbersome to write, you can provide shortcut
+commands. For example:
+\begin{verbatim}
+\GlsXtrLoadResources[src={my-data}]
+\newcommand{\gset}[2][]{\glsxtrfmt[#1]{S}{#2}}
+\newcommand{\gcard}[2][]{\glsxtrfmt[#1]{cardS}{#2}}
+\end{verbatim}
+Whilst this doesn't seem a great deal different from simply
+providing the definitions of \csfmt{set} and \csfmt{card} in the
+document, this means you don't have to worry about remembering
+the names of the actual commands provided in the \ext{bib} file
+(just the entry labels) and the use of \cs{glsxtrfmt} will
+automatically produce a hyperlink to the glossary entry if the
+\sty{hyperref} package has been loaded.
+\end{enumerate}
+
+Here's an alternative \ext{bib} that defines entries with a term, a
+description and a symbol:
+\begin{verbatim}
+@preamble{"\providecommand{\setfmt}[1]{\mathcal{#1}}
+\providecommand{\cardfmt}[1]{|\setfmt{#1}|}"}
+
+@entry{set,
+ name={set},
+ symbol={\setfmt{S}},
+ user1={setfmt},
+ description={collection of values}
+}
+@entry{cardinality,
+ name={cardinality},
+ symbol={\cardfmt{S}},
+ user1={cardfmt},
+ description={the number of elements in the \gls{set} $\glssymbol{set}$}
+}
+\end{verbatim}
+I've changed the entry labels and the names of the formatting commands.
+The definitions in the document need to reflect the change in label
+but not the change in the formatting commands:
+\begin{verbatim}
+\newcommand{\gset}[2][]{\glsxtrfmt[#1]{set}{#2}}
+\newcommand{\gcard}[2][]{\glsxtrfmt[#1]{cardinality}{#2}}
+\end{verbatim}
+
+Here's another approach that allows for a more complicated argument
+for the cardinality. (For example, if the argument is an expression
+involving set unions or intersections.)
+The \ext{bib} file is now:
+\begin{verbatim}
+@preamble{"\providecommand{\setfmt}[1]{\mathcal{#1}}
+\providecommand{\cardfmt}[1]{|#1|}"}
+
+@entry{set,
+ name={set},
+ symbol={\setfmt{S}},
+ user1={setfmt},
+ description={collection of values}
+}
+@entry{cardinality,
+ name={cardinality},
+ symbol={\cardfmt{\setfmt{S}}},
+ user1={cardfmt},
+ description={the number of elements in the \gls{set} $\glssymbol{set}$}
+}
+\end{verbatim}
+This has removed the \csfmt{setfmt} command from the definition of
+\csfmt{cardfmt}. Now the definitions in the document:
+\begin{verbatim}
+\newcommand{\gset}[1]{\glsxtrentryfmt{set}{#1}}
+\newcommand{\gcard}[2][]{\glsxtrfmt[#1]{cardinality}{#2}}
+\end{verbatim}
+This allows for code such as:
+\begin{verbatim}
+\[ \gcard{\gset{A} \cap \gset{B}} \]
+\end{verbatim}
+which will link back to the \texttt{cardinality} entry in the
+glossary and avoids any hyperlinking with \csfmt{gset}.
+Alternatively to avoid links with \csfmt{gcard} as well:
+\begin{verbatim}
+\newcommand{\gset}[1]{\glsxtrentryfmt{set}{#1}}
+\newcommand{\gcard}[1]{\glsxtrentryfmt{cardinality}{#1}}
+\end{verbatim}
+Now \csfmt{gset} and \csfmt{gcard} are simply formatting commands,
+but their actual definitions are determined in the \ext{bib} file.
+
+\section{\atentry{entry}}
+\labelatentry{entry}
+
+Regular terms are defined by the \atentry{entry} field. This requires the
+\field{description} field and either \field{name} or \field{parent}.
+
+For example:
+\begin{verbatim}
+@preamble{"\providecommand{\mtx}[1]{\boldsymbol{#1}}"}
+
+@entry{matrix,
+ name={matrix},
+ plural={matrices},
+ description={rectangular array of values, denoted \gls{M}},
+ seealso={vector}
+}
+
+@entry{M,
+ name={\ensuremath{M}},
+ description={a \gls{matrix}}
+}
+
+@entry{vector,
+ name = "vector",
+ description = {column or row of values, denoted \gls{v}},
+ seealso={matrix}
+}
+
+@entry{v,
+ name={\ensuremath{\vec{v}}},
+ description={a \gls{vector}}
+}
+\end{verbatim}
+If the \field{name} field is omitted it will be set from the
+parent's \field{name}. If the \field{sort} field is missing the
+default is obtained from the \field{name} field.
+(This can be overridden with \optref{sort-field}.)
+
+Terms defined using \atentry{entry} will be written to the output
+(\ext{glstex}) file using the command \csref{bibglsnewentry}.
+
+\section{\atentry{symbol}}
+\labelatentry{symbol}
+
+The \atentry{symbol} entry type is much like \atentry{entry}, but it's
+designed specifically for symbols, so in the previous example, the
+\texttt{M} and \texttt{v} terms would be better defined using the
+\atentry{symbol} entry type instead. For example:
+\begin{verbatim}
+@symbol{M,
+ name={\ensuremath{M}},
+ description={a \gls{matrix}}
+}
+\end{verbatim}
+
+The required fields are \field{name} or \field{parent}. The
+\field{description} field is required if the \field{name} field is
+missing. If the \field{sort} field is omitted, the default sort is
+given by the entry label. Note that this is different from
+\atentry{entry} where the sort defaults to \field{name} if omitted.
+
+Terms that are defined using \atentry{symbol} will be written to
+the output file using the command \csref{bibglsnewsymbol}.
+
+\section{\atentry{number}}
+\labelatentry{number}
+
+The \atentry{number} entry type is like \atentry{symbol}, but it's for
+numbers. The numbers don't have to be explicit digits and may have a
+symbolic representation. There's no real difference between the
+behaviour of \atentry{number} and \atentry{symbol} except that terms
+defined using \atentry{number} will be written to the output file
+using the command \csref{bibglsnewnumber}.
+
+For example, the file \filefmt{constants.bib} might define
+mathematical constants like this:
+\begin{verbatim}
+@number{pi,
+ name={\ensuremath{\pi}},
+ description={the ratio of the length of the circumference
+ of a circle to its diameter},
+ user1={3.14159}
+}
+
+@number{e,
+ name={\ensuremath{e}},
+ description={base of natural logarithms},
+ user1={2.71828}
+}
+\end{verbatim}
+This stores the approximate value in the \field{user1} field. This
+can be used to sort the entries in numerical order according to the
+values rather than the symbols:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ src={constants},% constants.bib
+ category={number},% set the category for all selected entries
+ sort={double},% numerical double-precision sort
+ sort-field={user1}% sort according to 'user1' field
+]
+\end{verbatim}
+The \optref[number]{category} option makes it easy to adjust the
+glossary format to include the \field{user1} field:
+\begin{verbatim}
+\renewcommand{\glsxtrpostdescnumber}{%
+ \ifglshasfield{useri}{\glscurrententrylabel}
+ { (approximate value: \glscurrentfieldvalue)}%
+ {}%
+}
+\end{verbatim}
+
+\section{\atentry{index}}
+\labelatentry{index}
+
+The \atentry{index} entry type is designed for entries that don't
+have a description. Only the label is required. If \field{name} is
+omitted, it's assumed to be the same as the label, even if
+\field{parent} is present. (Note this is different to the fallback
+behaviour of \atentry{entry}, which fetches the name from the parent
+entry.) However, this means that if the name contains any characters
+that can't be used in the label, you will need the \field{name}
+field. If the \field{sort} field is missing the
+default is obtained from the \field{name} field.
+
+Example:
+\begin{verbatim}
+@index{duck}
+
+@index{goose,plural={geese}}
+
+@index{sealion,name={sea lion}}
+
+@index{facade,name={fa\c{c}ade}}
+\end{verbatim}
+
+Terms that are defined using \atentry{index} will be written to the output
+file using the command \csref{bibglsnewindex}.
+
+\section{\atentry{abbreviation}}
+\labelatentry{abbreviation}
+
+The \atentry{abbreviation} entry type is designed for abbreviations.
+The required fields are \field{short} and \field{long}. If the
+\field{sort} key is missing, \bibgls\ will use the value of the
+\field{short} field.
+You can also use \optref{short-case-change} to convert the case of
+the \field{short} field.
+
+Note that you must set the abbreviation style before loading the
+resource file to ensure that the abbreviations are defined
+correctly, however \bibgls\ has no knowledge of the abbreviation
+style so it doesn't know if the \field{description} field must be
+included or if the default \field{sort} value isn't simply the value
+of the \field{short} field.
+
+You can instruct \bibgls\ to sort by the \field{long} field instead
+using \optref[long]{sort-field}. You can also tell \bibgls\ to
+ignore certain fields using \optref{ignore-fields}, so you can
+include a \field{description} field in the \ext{bib} file if
+you sometimes need it, and then instruct \bibgls\ to ignore it when
+you don't want it.
+
+For example:
+\begin{verbatim}
+@abbreviation{html,
+ short ="html",
+ long = {hypertext markup language},
+ description={a markup language for creating web pages}
+}
+\end{verbatim}
+If you want the \abbrstyle{long-noshort-desc} style, then you can put
+the following in your document (where the \ext{bib} file is called
+\filefmt{entries-abbrv.bib}):
+\begin{verbatim}
+\setabbreviationstyle{long-noshort-desc}
+\GlsXtrLoadResources[src={entries-abbrv.bib},sort-field={long}]
+\end{verbatim}
+Whereas, if you want the \abbrstyle{long-short-sc} style, then you can
+instead do:
+\begin{verbatim}
+\setabbreviationstyle{long-short-sc}
+\GlsXtrLoadResources[src={entries-abbrv.bib},ignore-fields={description}]
+\end{verbatim}
+or to convert the short value to upper case and use the
+\abbrstyle{long-short-sm} style instead:
+\begin{verbatim}
+\setabbreviationstyle{long-short-sm}
+\GlsXtrLoadResources[src={entries-abbrv.bib},
+ short-case-change={uc},% convert short value to upper case
+ ignore-fields={description}]
+\end{verbatim}
+(If you want an equivalent of \csfmt{newdualentry}, use
+\atentryref{dualentryabbreviation} instead.)
+
+Terms defined using \atentry{abbreviation} will be written to the output
+file using the command \csref{bibglsnewabbreviation}.
+
+\section{\atentry{acronym}}
+\labelatentry{acronym}
+
+The \atentry{acronym} entry type is like \atentry{abbreviation} except that
+the term is written to the output file using the command
+\csref{bibglsnewacronym}.
+
+\section{\atentry{dualentry}}
+\labelatentry{dualentry}
+
+The \atentry{dualentry} entry type is similar to \atentry{entry} but
+actually defines two entries: the primary entry and the dual entry.
+The dual entry contains the same information as the primary entry
+but some of the fields are swapped around. The dual entry is given
+the prefix set by the \optref{dual-prefix} option.
+
+Note that the \field{alias} field will never be copied to the dual
+entry, nor can it be mapped. The alias will only apply to the
+primary entry.
+
+By default, the \field{name} and \field{description} fields and the
+\field{plural} and \field{descriptionplural} fields are swapped.
+
+For example:
+\begin{verbatim}
+@dualentry{child,
+ name={child},
+ plural={children},
+ description={enfant}
+}
+\end{verbatim}
+Is like
+\begin{verbatim}
+@entry{child,
+ name={child},
+ plural={children},
+ description={enfant}
+ descriptionplural={enfants}
+}
+
+@entry{dual.child,
+ description={child},
+ descriptionplural={children},
+ name={enfant}
+ plural={enfants}
+}
+\end{verbatim}
+where \idprefix{dual} is replaced by the value of the
+\csopt{dual-prefix} option. However, instead of defining the entries
+with \csfmt{bibglsnewentry} both the primary and dual entries are
+defined using \csref{bibglsnewdualentry}. The \field{category}
+and \field{type} fields can be set for the dual entry using the
+\optref{dual-category} and \optref{dual-type} options.
+
+If \optref[combine]{dual-sort} then the dual entries will be sorted
+along with the primary entries, otherwise the \csopt{dual-sort}
+indicates how to sort the dual entries and the dual entries will be
+appended to the end of the \ext{glstex} file. The
+\optref{dual-sort-field} determines what field to use for the sort
+value if the dual entries should be sorted separately.
+
+For example:
+\begin{verbatim}
+\newglossary*{english}{English}
+\newglossary*{french}{French}
+
+\GlsXtrLoadResources[
+ src = {entries-dual},% data in entries-dual.bib
+ type = {english},% put primary entries in glossary 'english'
+ dual-type = {french},% put dual entries in glossary 'french'
+ category = {dictionary},% set the primary category to 'dictionary'
+ dual-category = {dictionary},% set the dual category to 'dictionary'
+ sort = {en},% sort primary entries according to language 'en'
+ dual-sort = {fr}% sort dual entries according to language 'fr'
+]
+\end{verbatim}
+
+Note that there's no dual equivalent to \atentry{index}
+since that entry type doesn't have required fields and
+there's nothing obvious to swap with that type that would
+differentiate it from a normal entry.
+
+\section{\atentry{dualentryabbreviation}}
+\labelatentry{dualentryabbreviation}
+
+The \atentry{dualentryabbreviation} entry type is similar to
+\atentry{dualentry}, but by default the
+field mappings are:
+\begin{itemize}
+\item \field{long} $\mapsto$ \field{name}
+\item \field{short} $\mapsto$ \field{text}
+\end{itemize}
+You may need to add a mapping from \field{shortplural} to
+\field{plural} if the default is inappropriate.
+
+The required fields are: \field{short}, \field{long} and
+\field{description}. This entry type is designed to emulate the
+example \cs{newdualentry} command given in the \sty{glossaries}
+user manual. The primary entry is an abbreviation with the given
+\field{short} and \field{long} fields (but not the
+\field{description}) and the secondary entry is a regular entry with
+the \field{name} copied from the \field{long} field.
+
+For example:
+\begin{verbatim}
+@dualentryabbreviation{svm,
+ long = {support vector machine},
+ short = {SVM},
+ description = {statistical pattern recognition technique}
+}
+\end{verbatim}
+is rather like doing
+\begin{verbatim}
+@abbreviation{svm,
+ long = {support vector machine},
+ short = {SVM}
+}
+
+@entry{dual.svm,
+ name = {support vector machine},
+ description = {statistical pattern recognition technique}
+}
+\end{verbatim}
+but \texttt{dual.svm} will automatically be selected if \texttt{svm}
+is indexed in the document. If \texttt{dual.svm} isn't explicitly
+indexed, it won't have a location list.
+
+As with \atentry{dualentry}, the \field{alias} field will never
+be copied to the dual entry, nor can it be mapped. The alias will
+only apply to the primary entry.
+
+If the \field{sort} field is missing \bibgls\ by default falls back
+on the \field{name} field. If this is missing, this sort value will
+fallback on the \field{short} field. This means that if \field{name}
+isn't explicitly given in \atentry{dualentryabbreviation}, then the
+primary entry will be sorted according to \field{short} but the dual
+will be sorted according its \field{name} (which has been copied
+from the primary \field{long}).
+
+Entries provided using \atentry{dualentryabbreviation} will be defined
+with
+\begin{alltt}
+\csref{bibglsnewdualentryabbreviation}
+\end{alltt}
+(which uses \cs{newabbreviation}) for the primary entries and with
+\begin{alltt}
+\csref{bibglsnewdualentryabbreviationsecondary}
+\end{alltt}
+(which uses \cs{longnewglossaryentry}) for the secondary entries.
+This means that if the \styopt{abbreviations}
+package option is used, this will put the primary entry in the
+\optfmt{abbreviations} glossary and the secondary entry in the
+\optfmt{main} glossary. Use the \optref{type} and
+\optref{dual-type} options to override this.
+
+\section{\atentry{dualsymbol}}
+\labelatentry{dualsymbol}
+
+This is like \atentryref{dualentry} but the default mappings
+swap the \field{name} and \field{symbol} fields (and the
+\field{plural} and \field{symbolplural} fields). The \field{name}
+and \field{symbol} are required.
+
+As with \atentry{dualentry}, the \field{alias} field will never
+be copied to the dual entry, nor can it be mapped. The alias will
+only apply to the primary entry.
+
+For example:
+\begin{verbatim}
+@dualsymbol{pi,
+ name={pi},
+ symbol={\ensuremath{\pi}},
+ description={the ratio of the length of the circumference
+ of a circle to its diameter}
+}
+\end{verbatim}
+
+Entries are defined using \csref{bibglsnewdualsymbol}, which by
+default sets the \field{category} to \optfmt{symbol}.
+
+\section{\atentry{dualnumber}}
+\labelatentry{dualnumber}
+
+This is much the same as \atentryref{dualsymbol} but entries are
+defined using \csref{bibglsnewdualnumber}, which by default sets
+the \field{category} to \optfmt{number}.
+
+The above example could be defined as a number since $\pi$ is a
+constant:
+\begin{verbatim}
+@dualnumber{pi,
+ name={pi},
+ symbol={\ensuremath{\pi}},
+ description={the ratio of the length of the circumference
+ of a circle to its diameter},
+ user1={3.14159}
+}
+\end{verbatim}
+
+This has stored the approximate value in the \field{user1} field.
+The post-description hook could then be adapted to show this.
+\begin{verbatim}
+\renewcommand{\glsxtrpostdescnumber}{%
+ \ifglshasfield{useri}{\glscurrententrylabel}
+ { (approximate value: \glscurrentfieldvalue)}%
+ {}%
+}
+\end{verbatim}
+
+This use of the \field{user1} field means that the dual entries
+could be sorted numerically according to the approximate value:
+\begin{verbatim}
+\usepackage[record,postdot,numbers,style=index]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ src={entries},% entries.bib
+ dual-type={numbers},
+ dual-sort={double},% decimal sort
+ dual-sort-field={user1}
+]
+\end{verbatim}
+
+\section{\atentry{dualabbreviation}}
+\labelatentry{dualabbreviation}
+
+The required fields are: \field{short}, \field{long},
+\field{dualshort} and \field{duallong}.
+This includes some new fields: \field{dualshort},
+\field{dualshortplural}, \field{duallong} and
+\field{duallongplural}. If these aren't already defined, they
+will be provided in the \ext{glstex} file with
+\begin{alltt}
+\cs{glsxtrprovidestoragekey}\margm{key}\marg{}\marg{}
+\end{alltt}
+This command is defined by the \sty{glossaries-extra} package.
+Note that this use with an empty third argument prevents
+the creation of a field access command (analogous to
+\cs{glsentrytext}). You can fetch the value with
+\cs{glsxtrusefield}. (See the \sty{glossaries-extra} manual for
+further details.) Remember that the field won't be
+available until the \ext{glstex} file has been created.
+
+As with \atentry{dualentry}, the \field{alias} field will never
+be copied to the dual entry, nor can it be mapped. The alias will
+only apply to the primary entry.
+
+Note that \bibgls\ doesn't know what abbreviation styles
+are in used, so if the \field{sort} field is missing
+it will fallback on the \field{short} field. If the abbreviations
+need to be sorted according to the \field{long} field instead,
+use \optref[long]{sort-field}.
+
+The \atentry{dualabbreviation} entry type is similar to
+\atentry{dualentry}, but by default the
+field mappings are:
+\begin{itemize}
+\item \field{short} $\mapsto$ \field{dualshort}
+\item \field{shortplural} $\mapsto$ \field{dualshortplural}
+\item \field{long} $\mapsto$ \field{duallong}
+\item \field{longplural} $\mapsto$ \field{duallongplural}
+\item \field{dualshort} $\mapsto$ \field{short}
+\item \field{dualshortplural} $\mapsto$ \field{shortplural}
+\item \field{duallong} $\mapsto$ \field{long}
+\item \field{duallongplural} $\mapsto$ \field{longplural}
+\end{itemize}
+Terms that are defined using \atentry{dualabbreviation} will be
+written to the output file using \csref{bibglsnewdualabbreviation}.
+
+If the \optref{dual-abbrv-backlink} option is on, the default field
+used for the backlinks is the \field{dualshort} field, so you'll need
+to make sure you adapt the glossary style to show that field. The
+simplest way to do this is through the category post description
+hook.
+
+For example, if the entries all have the \field{category} set
+to \optfmt{abbreviation}, then this requires redefining
+\cs{glsxtrpostdescabbreviation}.
+
+Here's an example dual abbreviation for a document where English is
+the primary language and German is the secondary language:
+\begin{alltt}
+@dualabbreviation\marg{rna,
+ short=\marg{RNA},
+ dualshort=\marg{RNS},
+ long=\marg{ribonucleic acid},
+ duallong=\marg{Ribonukleins\"aure}
+}
+\end{alltt}
+If the abbreviation is in the file called
+\filefmt{entries-dual-abbrv.bib}, then here's an example document:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[T1]{fontenc}
+\usepackage[utf8]{inputenc}
+
+\usepackage[ngerman,main=english]{babel}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record,nomain]{glossaries-extra}
+
+\newglossary*{english}{English}
+\newglossary*{german}{German}
+
+\setabbreviationstyle{long-short}
+
+\renewcommand*{\glsxtrpostdescabbreviation}{%
+ \ifglshasfield{dualshort}{\glscurrententrylabel}
+ {%
+ \space(\glscurrentfieldvalue)%
+ }%
+ {}%
+}
+
+\GlsXtrLoadResources[
+ src={entries-dual-abbrv},% entries-dual-abbrv.bib
+ type=english,% put primary entries in glossary 'english'
+ dual-type=german,% put primary entries in glossary 'german'
+ label-prefix={en.},% primary label prefix
+ dual-prefix={de.},% dual label prefix
+ sort=en,% sort primary entries according to language 'en'
+ dual-sort=de-1996,% sort dual entries according to 'de-1996'
+ % (German new orthography)
+ dual-abbrv-backlink% add links in the glossary to the opposite
+ %entry
+]
+
+\begin{document}
+
+English: \gls{en.rna}; \gls{en.rna}.
+
+German: \gls{de.rna}; \gls{de.rna}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+If the \optref{label-prefix} is omitted, then only the dual entries
+will have a prefix:
+\begin{verbatim}
+English: \gls{rna}; \gls{rna}.
+
+German: \gls{de.rna}; \gls{de.rna}.
+\end{verbatim}
+Another variation is to use the \abbrstyle{long-short-user}
+abbreviation style and modify the associated \cs{glsxtruserfield} so that
+the \field{duallong} field is selected for the parenthetical
+material:
+\begin{verbatim}
+\renewcommand*{\glsxtruserfield}{duallong}
+\end{verbatim}
+This means that the first use of the primary entry is displayed as
+\begin{quote}
+ribonucleic acid (RNA, Ribonukleins\"aure)
+\end{quote}
+and the first use of the dual entry is displayed as:
+\begin{quote}
+Ribonukleins\"aure (RNS, ribonucleic acid)
+\end{quote}
+
+Here's an example to be used with the \abbrstyle{long-short-desc}
+style:
+\begin{alltt}
+@dualabbreviation\marg{rna,
+ short=\marg{RNA},
+ dualshort=\marg{RNS},
+ long=\marg{ribonucleic acid},
+ duallong=\marg{Ribonukleins\"aure}
+ description=\marg{a polymeric molecule},
+ user1=\marg{Ein polymeres Molek\"ul}
+}
+\end{alltt}
+This stores the dual description in the \field{user1} field,
+so this needs a mapping.
+The new example document is much the same as the previous one, except
+that the \optref{dual-abbrv-map} option is needed to include the
+mapping between the \field{description} and \field{user1} fields:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[T1]{fontenc}
+\usepackage[utf8]{inputenc}
+
+\usepackage[ngerman,main=english]{babel}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record,nomain]{glossaries-extra}
+
+\newglossary*{english}{English}
+\newglossary*{german}{German}
+
+\setabbreviationstyle{long-short-desc}
+
+\renewcommand*{\glsxtrpostdescabbreviation}{%
+ \ifglshasfield{dualshort}{\glscurrententrylabel}
+ {%
+ \space(\glscurrentfieldvalue)%
+ }%
+ {}%
+}
+
+\GlsXtrLoadResources[
+ src={entries-dual-abbrv-desc},% entries-dual-abbrv-desc.bib
+ type=english,% put primary entries in glossary 'english'
+ dual-type=german,% put primary entries in glossary 'german'
+ label-prefix={en.},% primary label prefix
+ dual-prefix={de.},% dual label prefix
+ sort=en,% sort primary entries according to language 'en'
+ sort-field={long},% sort by the 'long' field
+ dual-sort=de-1996,% sort dual entries according to 'de-1996'
+ % (German new orthography)
+ dual-abbrv-backlink,% add links in the glossary to the opposite
+ % entry
+% dual key mappings:
+ dual-abbrv-map={%
+ {short,shortplural,long,longplural,dualshort,dualshortplural,
+ duallong,duallongplural,description,user1},
+ {dualshort,dualshortplural,duallong,duallongplural,short,shortplural,
+ long,longplural,user1,description}
+ }
+]
+
+\begin{document}
+
+English: \gls{en.rna}; \gls{en.rna}.
+
+German: \gls{de.rna}; \gls{de.rna}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+Note that since this document uses the \abbrstyle{long-short-desc}
+abbreviation style, the \optref{sort-field} needs to be changed
+to \optfmt{long}, since the fallback if the \field{sort} field is
+missing is the \field{short} field.
+
+If I change the order of the mapping to:
+\begin{verbatim}
+ dual-abbrv-map={%
+ {long,longplural,short,shortplural,dualshort,dualshortplural,
+ duallong,duallongplural,description,user1},
+ {duallong,duallongplural,dualshort,dualshortplural,short,shortplural,
+ long,longplural,user1,description}
+\end{verbatim}
+Then the back-link field will switch to \field{duallong}. The
+post-description hook can be modified to allow for this:
+\begin{verbatim}
+\renewcommand*{\glsxtrpostdescabbreviation}{%
+ \ifglshasfield{duallong}{\glscurrententrylabel}
+ {%
+ \space(\glscurrentfieldvalue)%
+ }%
+ {}%
+}
+\end{verbatim}
+
+An alternative is to use the \abbrstyle{long-short-user-desc} style
+without the post-description hook:
+\begin{verbatim}
+\setabbreviationstyle{long-short-user-desc}
+
+\renewcommand*{\glsxtruserfield}{duallong}
+\end{verbatim}
+However be careful with this approach as it can cause nested
+hyperlinks. In this case it's better to use the
+\abbrstyle{long-postshort-user-desc} style which defers the
+parenthetical material until after the link-text:
+\begin{verbatim}
+\setabbreviationstyle{long-postshort-user-desc}
+
+\renewcommand*{\glsxtruserfield}{duallong}
+\end{verbatim}
+If the back-link field has been switched to \field{duallong} then
+the post-description hook is no longer required.
+
+\section{\atentry{dualacronym}}
+\labelatentry{dualacronym}
+
+As \atentry{dualabbreviation} but defines the entries with
+\csref{bibglsnewdualacronym}.
+
+\chapter{Resource File Options}
+\label{sec:resourceopts}
+\setcounter{secnumdepth}{1}
+
+Make sure that you load \sty{glossaries-extra} with the
+\styopt{record} package option. This ensures that \bibgls\ can pick
+up the required information from the \ext{aux} file. (You may omit
+this option if you use \optref[all]{selection} and you don't require
+the location lists.)
+
+The \ext{glstex} resource files created by \bibgls\ are loaded in
+the document using
+\begin{definition}\plabelcs{glsxtrresourcefile}
+\cs{glsxtrresourcefile}\oargm{options}\margm{filename}
+\end{definition}
+where \meta{filename} is the name of the resource file without the
+\ext{glstex} extension.
+You can have multiple \cs{glsxtrresourcefile} commands within your
+document, but each \meta{filename} must be unique, otherwise \LaTeX\
+would attempt to input the same \ext{glstex} file multiple times.
+\bibgls\ checks for non-unique file names.
+
+There's a shortcut command that uses
+\cs{jobname} in the \meta{filename}:
+\begin{definition}
+\cs{GlsXtrLoadResources}\oargm{options}
+\end{definition}
+The first instance of this command is equivalent to
+\begin{alltt}
+\cs{glsxtrresourcefile}\oargm{options}\marg{\cs{jobname}}
+\end{alltt}
+Any additional use of \cs{GlsXtrLoadResources} is equivalent to
+\begin{alltt}
+\cs{glsxtrresourcefile}\oargm{options}\marg{\cs{jobname}-\meta{n}}
+\end{alltt}
+where \meta{n} is number. For example:
+\begin{verbatim}
+\GlsXtrLoadResources[src=entries-en,sort={en}]
+\GlsXtrLoadResources[src=entries-fr,sort={fr}]
+\GlsXtrLoadResources[src=entries-de,sort={de-1996}]
+\end{verbatim}
+This is equivalent to:
+\begin{verbatim}
+\glsxtrresourcefile[src=entries-en,sort={en}]{\jobname}
+\glsxtrresourcefile[src=entries-fr,sort={fr}]{\jobname-1}
+\glsxtrresourcefile[src=entries-de,sort={de-1996}]{\jobname-2}
+\end{verbatim}
+In general, it's simplest just to use \cs{GlsXtrLoadResources}.
+
+The optional argument \meta{options} is a comma-separated \keyvallist.
+Allowed options are listed below.
+The option list applies only to that specific
+\meta{filename}\ext{glstex} and are not carried over to the next
+instance of \cs{glsxtrresourcefile}. The \sty{glossaries-extra}
+package doesn't parse the options, but just writes the information to the
+\ext{aux} file. This means that any invalid options will be reported
+by \bibgls\ not by \sty{glossaries-extra}.
+
+If you have multiple \ext{bib} files you can either select them all
+using \optref[\meta{bib list}]{src} in a single
+\cs{glsxtrresourcefile} call, if they all require the same settings,
+or you can load them separately with different settings applied.
+
+For example, if the files \filefmt{entries-terms.bib} and
+\filefmt{entries-symbols.bib} have the same settings:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries-terms,entries-symbols}]
+\end{verbatim}
+Alternatively, if they have different settings:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries-terms},type=main]
+\GlsXtrLoadResources[src={entries-symbols},sort=use,type=symbols]
+\end{verbatim}
+
+Note that the sorting is applied to each resource call independently
+of other resources. This means that if you have multiple instances
+of \cs{glsxtrresourcefile} but only one glossary type, the glossary
+will effectively contain blocks of sorted entries. For example, if
+\filefmt{file1.bib} contains:
+\begin{verbatim}
+@index{duck}
+@index{zebra}
+@index{aardvark}
+\end{verbatim}
+and \filefmt{file2.bib} contains:
+\begin{verbatim}
+@index{caterpillar}
+@index{bee}
+@index{wombat}
+\end{verbatim}
+then
+\begin{verbatim}
+\GlsXtrLoadResources[src={file1,file2}]
+\end{verbatim}
+will result in the list: aardvark, bee, caterpillar, duck, wombat,
+zebra. These six entries are all defined when
+\csfmt{jobname}\filefmt{.glstex} is read.
+Whereas
+\begin{verbatim}
+\GlsXtrLoadResources[src={file1}]
+\GlsXtrLoadResources[src={file2}]
+\end{verbatim}
+will result in the list: aardvark, duck, zebra, bee, caterpillar,
+wombat. The first three (aardvark, duck, zebra) are defined when
+\csfmt{jobname}\filefmt{.glstex} is read. The second three (bee,
+caterpillar, wombat) are defined when \csfmt{jobname}\filefmt{-1.glstex}
+is read. Since \cs{printunsrtglossary} simply iterates over all
+defined entries, this is the ordering used.
+
+\plabelcs{strong}%
+Note \bibgls\ allows \ext{bib} files that don't provide any entries.
+This can be used to provide commands in \atentryref{preamble}.
+For example, suppose I have \filefmt{defs.bib} that just contains
+\begin{verbatim}
+@preamble{"\providecommand{\strong}[1]{\textbf{\color{red}#1}}
+\providecommand{\test}[2]{#2 (#1)}"}
+\end{verbatim}
+This provides two commands: \csfmt{strong} (which sets the font
+weight and colour) and \csfmt{test} (which just displays its second
+argument followed by the first in parentheses).
+
+Suppose I also have \filefmt{entries.bib} that contains:
+\begin{verbatim}
+@index{example,
+ name={\strong{\test{stuff}{example}}}
+}
+@index{sample}
+@index{test}
+@index{foo}
+@index{bar}
+\end{verbatim}
+This contains an entry that requires the commands provided in
+\filefmt{defs.bib}, so to ensure those commands are defined, I can
+do:
+\begin{verbatim}
+\GlsXtrLoadResources[src={defs,entries}]
+\end{verbatim}
+Unfortunately this results in the sort value for \texttt{example} being
+set to \texttt{redexample (stuff)} because the interpreter has
+detected the provided commands and expanded
+\begin{verbatim}
+\strong{\test{stuff}{example}}
+\end{verbatim}
+to
+\begin{verbatim}
+\textbf{\color{red}example (stuff)}
+\end{verbatim}
+It discards font changes, so \csfmt{textbf} is ignored, but it doesn't
+recognise \cs{color} and so doesn't know that the first argument is
+just the colour specifier and therefore doesn't discard it.
+This means that \qt{\textbf{\color{red}example (stuff)}} is placed
+between \qt{foo} and \qt{sample} instead of between \qt{bar} and
+\qt{foo}.
+
+I can prevent the interpreter from parsing \atentryref{preamble}:
+\begin{verbatim}
+\GlsXtrLoadResources[src={defs,entries},interpret-preamble=false]
+\end{verbatim}
+Now when the sort value for \texttt{example} is obtained from
+\begin{verbatim}
+\strong{\test{stuff}{example}}
+\end{verbatim}
+no expansion occurs (since \csfmt{strong} and \csfmt{test} are
+unrecognised) so the sort value ends up as
+\texttt{stuffexample}
+which places \qt{\textbf{\color{red}example (stuff)}} between
+\qt{sample} and \qt{test}, which is again incorrect.
+
+The best thing to do in this situation is to split the provided
+commands into two \ext{bib} files: one that shouldn't be interpreted
+and one that should.
+
+For example, \filefmt{defs-nointerpret.bib}:
+\begin{verbatim}
+@preamble{"\providecommand{\strong}[1]{\textbf{\color{red}#1}}"}
+\end{verbatim}
+and \filefmt{defs-interpret.bib}:
+\begin{verbatim}
+@preamble{"\providecommand{\test}[2]{#2 (#1)}"}
+\end{verbatim}
+Now the first one can be loaded with \optref[false]{interpret-preamble}:
+\begin{verbatim}
+\GlsXtrLoadResources[src={defs-nointerpret},interpret-preamble=false]
+\end{verbatim}
+This creates a \ext{glstex} file that provides \csfmt{strong} but
+doesn't define any entries. The other file \filefmt{defs-interpret.bib} can
+then be loaded with the default \optref[true]{interpret-preamble}:
+\begin{verbatim}
+\GlsXtrLoadResources[src={defs-interpret,entries}]
+\end{verbatim}
+The provided commands are remembered by the interpreter, so you can
+also do:
+\begin{verbatim}
+\GlsXtrLoadResources[src={defs-interpret}]
+\GlsXtrLoadResources[src={entries}]
+\end{verbatim}
+The \emph{contents} of \atentryref{preamble} are only written to the
+associated \ext{glstex} file, but the definitions contained within
+the \atentry{preamble} are retained by the interpreter for subsequent
+resource sets.
+
+\section{General Options}
+\label{sec:generalopts}
+
+\subsection{\csoptnv{charset}\csopteqval{encoding-name}}
+\labelopt{charset}
+
+If the character encoding hasn't been supplied in the \ext{bib} file
+with the encoding comment
+\begin{alltt}
+\% Encoding: \meta{encoding-name}
+\end{alltt}
+then you can supply the correct encoding using
+\csopt[encoding-name]{charset}. In general, it's better to include
+the encoding in the \ext{bib} file where it can also be read by
+a \ext{bib} managing systems, such as JabRef.
+
+See \argref{tex-encoding} for the encoding used to write the \ext{glstex}
+file.
+
+\subsection{\csoptnv{interpret-preamble}\csopteqval{boolean}}
+\labelopt{interpret-preamble}
+
+This is a boolean option that determines whether or not the
+interpreter should parse the contents of \atentryref{preamble}.
+The default is \optfmt{true}. If \optfmt{false}, the preamble
+contents will still be written to the \ext{glstex} file, but any
+commands provided in the preamble won't be recognised if the
+interpreter is needed to determine an entry's sort value.
+
+\subsection{\csoptnv{set-widest}\csopteqval{boolean}}
+\labelopt{set-widest}
+
+The \glostyle{alttree} glossary style needs to know the widest
+\field{name} (for each level, if hierarchical). This can
+be set using \cs{glssetwidest} provided by the \sty{glossaries}
+package, but this requires knowing which name is the widest.
+
+The boolean option \csopt[true]{set-widest} will try to calculate
+the widest names for each hierarchical level. Since it doesn't know
+the fonts that will be used in the document or if there are any
+non-standard commands that aren't provided in the \ext{bib} files
+preamble, this option may not work. The transcript file will
+include the message
+\begin{alltt}
+Calculated width of '\meta{text}': \meta{number}
+\end{alltt}
+where \meta{text} is \bibgls's interpretation of the contents
+of the \field{name} field and \meta{number} is a rough guide
+to the width of \meta{text} assuming the operating system's
+default serif font. The entry that has the largest \meta{number}
+is the one that will be selected. This will then be implemented
+using:
+\begin{alltt}
+\cs{glssetwidest}\oargm{level}\marg{\cs{glsentryname}\margm{id}}
+\end{alltt}
+where \meta{id} is the entry's label. This leaves \TeX\ to
+compute the width according to the document fonts.
+
+If \optref{type} has been set, the \cs{glssetwidest} command
+will be appended to the glossary preamble for that type, otherwise
+it's simply set in the \ext{glstex} file and may be overridden
+later in the document if required.
+
+\subsection{\csoptnv{secondary}\csopteqval{list}}
+\labelopt{secondary}
+
+It may be that you want to display a glossary multiple times
+but with a different order. For example, the first time
+alphabetically and the second time by category.
+
+You can do this with the \csopt{secondary} option. The value
+(which must be supplied) is a comma-separated list where each
+item in the list is in the format
+\begin{definition}
+\meta{sort}:\meta{field}:\meta{type}
+\end{definition}
+or
+\begin{definition}
+\meta{sort}:\meta{type}
+\end{definition}
+If the
+\meta{field} is omitted, the value of \optref{sort-field} is used.
+The value of \meta{sort} is as for \optref{sort}, but note that in this case the sort value \optfmt{unsrt} or
+\optfmt{none} means to use the same ordering as the primary
+entries. So with \optref[de-CH-1996]{sort},
+\optref[none:copies]{secondary} the \texttt{copies}
+list will be ordered according to \texttt{de-CH-1996} and not
+according to the order in which they were read when the \ext{bib}
+file or files were parsed.
+If \meta{sort} is \optfmt{custom}, then the rule should be
+provided with \optref{secondary-sort-rule}.
+
+This will copy all the selected entries into the glossary labelled
+\meta{type} sorted according to \meta{sort} using \meta{field} as
+the sort value.
+
+(If the glossary \meta{type} doesn't exist, it will be
+defined with \cs{provideignoredglossary*}\margm{type}.)
+Note that if the glossary already exists and contains entries,
+the existing entries aren't re-ordered. The new entries are
+simply appended to the list.
+
+For example, suppose the \ext{bib} file contains entries like:
+\begin{verbatim}
+@entry{quartz,
+ name={quartz},
+ description={hard mineral consisting of silica},
+ category={mineral}
+}
+
+@entry{cabbage,
+ name={cabbage},
+ description={vegetable with thick green or purple leaves},
+ category={vegetable}
+}
+
+@entry{waterfowl,
+ name={waterfowl},
+ description={any bird that lives in or about water},
+ category={animal}
+}
+\end{verbatim}
+and the document preamble contains:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries},sort={en-GB},
+ secondary={en-GB:category:topic}
+]
+\end{verbatim}
+This sorts the primary entries according to the default
+\optref{sort-field} and then sorts the entries according
+to the \field{category} field and copies this list to
+the \texttt{topic} glossary (which will be provided if not defined.)
+
+The secondary list can be displayed with the hypertargets switched
+off to prevent duplicates. The cross-references will link to the
+original glossary.
+
+For example:
+\begin{verbatim}
+\printunsrtglossary[title={Summary (alphabetical)}]
+\printunsrtglossary[title={Summary (by topic)},target=false]
+\end{verbatim}
+
+The alternative (or if more than two lists are required) is to
+reload the same \ext{bib} file with different label prefixes.
+For example, if the entries are stored in \filefmt{entries.bib}:
+\begin{verbatim}
+\newglossary*{nosort}{Symbols (Unsorted)}
+\newglossary*{byname}{Symbols (Letter Order)}
+\newglossary*{bydesc}{Symbols (Ordered by Description)}
+\newglossary*{byid}{Symbols (Ordered by Label)}
+
+\GlsXtrLoadResources[
+ src={entries},% entries.bib
+ sort={unsrt},
+ type={nosort}
+]
+
+\GlsXtrLoadResources[
+ src={entries},% entries.bib
+ sort={letter-case},
+ type={byname},
+ label-prefix={byname.}
+]
+
+\GlsXtrLoadResources[
+ src={entries},% entries.bib
+ sort={locale},
+ sort-field={description},
+ type={bydesc},
+ label-prefix={bydesc.}
+]
+
+\GlsXtrLoadResources[
+ src={entries},% entries.bib
+ sort={letter},
+ sort-field={id},
+ type={byid},
+ label-prefix={byid.}
+]
+\end{verbatim}
+
+\subsection{\csoptnv{secondary-sort-rule}\csopteqval{value}}
+\labelopt{secondary-sort-rule}
+
+As \optref{sort-rule} but for secondary custom sorting.
+
+\section{Selection Options}
+\label{sec:selectionopts}
+
+\subsection{\csoptnv{src}\csopteqval{list}}
+\labelopt{src}
+
+This identifies the \ext{bib} files containing the entry
+definitions. The value should be a comma-separated list of the
+required \ext{bib} files. These may either be in the current working
+directory or in the directory given by the \argref{dir} switch or on
+\TeX's path (in which case \app{kpsewhich} will be used to find
+them). The \ext{bib} extension may be omitted. Remember that if
+\meta{list} contains multiple files it must be grouped to protect
+the comma from the \meta{options} list.
+
+For example
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries-terms,entries-symbols}]
+\end{verbatim}
+indicates that \bibgls\ must read the files
+\filefmt{entries-terms.bib} and \filefmt{entries-symbols.bib} and
+create the file given by \cs{jobname}\ext{glstex} on the first
+instance or \cs{jobname}\texttt{-}\meta{n}\ext{glstex} on subsequent
+use.
+
+With \csref{glsxtrresourcefile}\oargm{options}\margm{filename}, if
+the \csopt{src} option is omitted,
+the \ext{bib} file is assumed to be \meta{filename}\ext{bib}. For example:
+\begin{verbatim}
+\glsxtrresourcefile{entries-symbols}
+\end{verbatim}
+indicates that \bibgls\ needs to read the file
+\filefmt{entries-symbols.bib}, which contains the entry data, and create the file
+\filefmt{entries-symbols.glstex}. If the \ext{bib} file is
+different or if you have multiple \ext{bib} files, you need to use
+the \csopt{src} option.
+
+\cs{GlsXtrLoadResources} uses \cs{jobname} as the argument of
+\cs{glsxtrresourcefile} on the first instance, so
+\begin{verbatim}
+\GlsXtrLoadResources[]
+\end{verbatim}
+will assume \optfmt{src=\cs{jobname}}. Remember that subsequent uses
+of \cs{GlsXtrLoadResources} append a suffix, so in general it's
+best to always supply \csopt{src}.
+
+\subsection{\csoptnv{selection}\csopteqval{value}}
+\labelopt{selection}
+
+By default all entries that have records in the \ext{aux} file will
+be selected as well as all their dependent entries. The dependent
+entries that don't have corresponding records on the first \LaTeX\
+run, may need an additional build to ensure their location lists
+are updated.
+
+Remember that on the first \LaTeX\ run the \ext{glstex} files don't
+exist. This means that the entries can't be defined. The
+\styopt{record} package option additionally switches on the
+\styopt[warn]{undefaction} option, which means that you'll only get
+warnings rather than errors when you reference entries in the
+document. This means that you can't use \cs{glsaddall} with
+\bibgls\ because the glossary lists are empty on the first run, so
+there's nothing for \cs{glsaddall} to iterate over.
+Instead, if you want to add all defined entries, you need to
+instruct \bibgls\ to do this with the \csopt{selection} option. The
+following values are allowed:
+\begin{itemize}
+\item \optfmt{recorded and deps}: add all recorded entries and
+their dependencies (default).
+\item \optfmt{recorded and deps and see}: as above but will also
+add unrecorded entries whose \field{see} or \field{seealso} field refers to a recorded entry.
+\item \optfmt{recorded no deps}: add all recorded entries but not
+their dependencies. The dependencies include those referenced in the
+\field{see} or \field{seealso} field, \field{parent} entries and those found referenced
+with commands like \cs{gls} in the field values that are parsed by
+\bibgls. With this setting, parents will be omitted unless they've
+been referenced in the document through commands like \cs{gls}.
+\item \optfmt{recorded and ancestors}: this is like the previous
+setting but parents are added even if they haven't been referenced
+in the document. The other dependent entries are omitted if they
+haven't been referenced in the document.
+\item \optfmt{all}: add all entries found in the \ext{bib} files
+supplied in the \csopt{src} option.
+\end{itemize}
+The \meta{value} must be supplied.
+
+For example, suppose the file \filefmt{entries.bib} contains:
+\begin{verbatim}
+@index{run}
+
+@index{sprint,see={run}}
+
+@index{dash,see={sprint}}
+\end{verbatim}
+If the document only references the \qt{run} entry (for example,
+using \verb|\gls{run}|) then:
+\begin{itemize}
+\item If \csopt[recorded and deps]{selection}, only the \qt{run}
+entry is selected. The \qt{run} entry has a record, so it's
+selected, but it has no dependencies. Neither \qt{sprint} nor
+\qt{dash} have records, so they're not selected.
+\item If \csopt[recorded and deps and see]{selection}, the \qt{run}
+and \qt{sprint} entries are selected, but not the \qt{dash} entry.
+The \qt{run} entry is selected because it has a record. The
+\qt{sprint} entry doesn't have a record but its \field{see} field
+includes \qt{run}, which does have a record, so \qt{sprint} is also
+selected. The \qt{dash} entry doesn't have a record. Its
+\field{see} field references \qt{sprint}. Although \qt{sprint} has
+been selected, it doesn't have any records, so \qt{dash} isn't
+selected.
+\end{itemize}
+The above is just an example. The circuitous redirection of
+\qt{dash} to \qt{sprint} to \qt{run} is unhelpful to the reader and
+is best avoided. A better method would be:
+\begin{verbatim}
+@index{run}
+
+@index{sprint,see={run}}
+
+@index{dash,see={run}}
+\end{verbatim}
+The \csopt[recorded and deps and see]{selection} in this case will
+select all three entries, and the document won't send the reader on a
+long-winded detour.
+\subsection{\csoptnv{match}\csopteqval{\keyvallist}}
+\labelopt{match}
+
+It's possible to filter the selection by matching field values.
+If \meta{\keyvallist} is empty no filtering will be applied, otherwise
+\meta{\keyvallist} should be a \meta{key}=\meta{regexp} list, where
+\meta{key} is the name of a field or \optfmt{id} for the entry's
+label or \optfmt{entrytype} for the entry's \ext{bib} type (as in
+the part after \verb|@| in the \ext{bib} file not the \field{type}
+field identifying the glossary label).
+
+The \meta{regex} part should be a regular expression conforming
+to
+\href{http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html}{Java's
+Pattern class}. The pattern is anchored (\texttt{oo.*} matches
+\texttt{oops} but not \texttt{loops}) and \meta{regexp} can't be
+empty. Remember that \TeX\ will expand the option list as
+it writes the information to the \ext{aux} file so take
+care with special characters. For example, to match a literal
+period use \verb|\string\.| not \verb|\.| (backslash dot).
+
+If the field is missing its value it is assumed to be empty for
+the purposes of the pattern match even if it will be assigned a
+non-empty default value when the entry is defined.
+
+If a field is listed multiple times, the pattern for that
+field is concatenated using
+\begin{alltt}
+(?:\meta{pattern-1})|(?:\meta{pattern-2})
+\end{alltt}
+where \meta{pattern-1} is the current pattern for that field
+and \meta{pattern-2} is the new pattern. This means it performs a
+logical OR\@. For the non-duplicate
+fields the logical operator is given by \optref{match-op}.
+For example:
+\begin{verbatim}
+match-op={and},
+match={
+ {category=animals},
+ {topic=biology},
+ {category=vegetables}
+}
+\end{verbatim}
+This will keep all the selected entries that satisfy:
+\begin{itemize}
+\item \field{category} matches \verb"(?:animals)|(?:vegetables)"
+
+(the \field{category} is either \optfmt{animals} or
+\optfmt{vegetables})
+
+\item[AND]
+
+\item \field{topic} is \texttt{biology}.
+\end{itemize}
+and will discard any entries that don't satisfy this condition.
+A message will be written to the log file for each entry
+that's discarded.
+
+Patterns for unknown fields will be ignored. If the entire
+list consists of patterns for unknown fields it will be
+treated as \csopt[\empty]{match}. That is, no filtering will be
+applied.
+
+\subsection{\csoptnv{match-op}\csopteqval{value}}
+\labelopt{match-op}
+
+If the value of \optref{match} contains more than one
+\meta{key}=\meta{pattern} element, the \csopt{match-op}
+determines whether to apply a logical AND or a logical OR.
+The \meta{value} may be either \optfmt{and} or \optfmt{or}.
+The default is \csopt[and]{match-op}.
+
+\subsection{\csoptnv{flatten}\csopteqval{boolean}}
+\labelopt{flatten}
+
+This is a boolean option. The default value is
+\csopt[false]{flatten}.
+If \csopt[true]{flatten}, the sorting will ignore hierarchy and
+the \field{parent} field will be omitted when writing
+the definitions to the \ext{glstex} file, but the parent entries
+will still be considered a dependent ancestor from the
+\optref{selection} point of view.
+
+Note the difference between this option and using
+\csopt[parent]{ignore-fields} which will remove the dependency
+(unless a dependency is established through another field).
+
+\subsection{\csoptnv{flatten-lonely}\csopteqval{value}}
+\labelopt{flatten-lonely}
+
+This may take one of three values: \optfmt{false} (default),
+\optfmt{presort} and \optfmt{postsort}. The value must be supplied.
+
+Unlike the \optref{flatten} option, which completely
+removes the hierarchy, the \csopt{flatten-lonely} option can be used
+to selectively alter the hierarchy. In this case only those entries
+that have a parent but have no siblings are checked. This option
+is affected by the \optref{flatten-lonely-rule} setting. The conditions for
+moving a child up one hierarchical level are as follows:
+\begin{itemize}
+\item The child must have a parent, and
+\item the child can't have any selected siblings, and
+\item if \csopt[only unrecorded parents]{flatten-lonely-rule}
+ then the parent can't have a location list, where the location list
+ includes records and \field{see} or \field{seealso}
+ cross-references (for the other rules the parent may have a location
+ list as long as it only has the one child selected).
+\end{itemize}
+If the child is selected for hierarchical adjustment, the parent
+will be removed if:
+\begin{itemize}
+\item The parent has no location list, and
+\item \csopt{flatten-lonely-rule} isn't set to \optfmt{no discard}.
+\end{itemize}
+
+The value of \csopt{flatten-lonely} determines whether the
+adjustment should be made before sorting (\optfmt{presort})
+or after sorting (\optfmt{postsort}). To disable this function
+use \csopt[false]{flatten-lonely}.
+
+For example, suppose the file \filefmt{entries.bib} contains:
+\begin{verbatim}
+@index{birds}
+@index{duck,parent={birds}}
+@index{goose,plural={geese},parent={birds}}
+@index{swan,parent={birds}}
+@index{chicken,parent={birds}}
+
+@index{vegetable}
+@index{cabbage,parent={vegetable}}
+
+@index{minerals}
+@index{quartz,parent={minerals}}
+@index{corundum,parent={minerals}}
+@index{amber,parent={minerals}}
+@index{gypsum,parent={minerals}}
+
+@index{aardvark}
+@index{bard}
+@index{buzz}
+
+@index{item}
+@index{subitem,parent={item}}
+@index{subsubitem,parent={subitem}}
+\end{verbatim}
+and suppose the document contains:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[record,style=indexgroup]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries.bib}]
+
+\begin{document}
+\gls{duck}.
+\gls{quartz}, \gls{corundum}, \gls{amber}.
+\gls{aardvark}, \gls{bard}, \gls{buzz}.
+\gls{vegetable}, \gls{cabbage}.
+\gls{subsubitem}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+Although the \texttt{duck} entry has siblings in the
+\filefmt{entries.bib} file, none of them have been recorded
+(indexed) in the document, nor has the parent \texttt{birds} entry.
+
+This document hasn't used \csopt{flatten-lonely}, so the default
+\csopt[false]{flatten-lonely} is assumed. This results in the
+hierarchical structure:
+\begin{description}\setlength\itemsep{0pt}%
+\item[A] \null
+\item[aardvark] 1
+\item[B] \null
+\item[bard] 1
+\item[birds] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[duck] 1
+ \end{description}
+\item[buzz] 1
+\item[I] \null
+\item[item] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[subitem] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[subsubitem] 1
+ \end{description}
+ \end{description}
+\item[M] \null
+\item[minerals] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[amber] 1
+ \item[corundum] 1
+ \item[quartz] 1
+ \end{description}
+\item[V] \null
+\item[vegetable] 1
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[cabbage] 1
+ \end{description}
+\end{description}
+(The \qt{1} in the above indicates the page number.)
+There are some entries here that look a little odd: \texttt{duck},
+\texttt{cabbage} and \texttt{subsubitem}. In each case they are a
+lone child entry. It would look better if they could be compressed,
+but I don't want to use the \optref{flatten} option, as I still want
+to keep the mineral hierarchy.
+
+If I now add \csopt[postsort]{flatten-lonely}:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries.bib},flatten-lonely=postsort]
+\end{verbatim}
+the hierarchy becomes:
+\begin{description}\setlength\itemsep{0pt}%
+\item[A] \null
+\item[aardvark] 1
+\item[B] \null
+\item[bard] 1
+\item[birds, duck] 1
+\item[buzz] 1
+\item[I] \null
+\item[item, subitem, subsubitem] 1
+\item[M] \null
+\item[minerals] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[amber] 1
+ \item[corundum] 1
+ \item[quartz] 1
+ \end{description}
+\item[V] \null
+\item[vegetable] 1
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[cabbage] 1
+ \end{description}
+\end{description}
+The \field{name} field of the \texttt{duck} entry has been
+set to
+\begin{verbatim}
+name={\bibglsflattenedchildpostsort{birds}{duck}}
+\end{verbatim}
+the \field{text} field has been set to
+\begin{verbatim}
+text={duck}
+\end{verbatim}
+the \field{group} field is copied over from the parent entry (\qt{B}),
+and the \field{parent} field has been adjusted, moving \texttt{duck}
+up one hierarchical level.
+Finally, the former parent \texttt{birds} entry has been removed (the default
+\optref[only unrecorded parents]{flatten-lonely-rule} is in effect).
+
+The default definition of \csref{bibglsflattenedchildpostsort}
+formats its arguments so that they are separated by a comma and
+space (\qt{birds, duck}). If the \field{text} field had been set
+in the original \atentryref{index} definition of \text{duck}, it
+wouldn't have been altered. This adjustment ensures that in the
+document \verb|\gls{duck}| still produces \qt{duck} rather than
+\qt{birds, duck}.
+(If the child and parent \field{name} fields are identical,
+the terms are considered homographs. See below for further details.)
+
+The \texttt{subsubitem} entry has also been adjusted. This was done
+in a multi-stage process, starting with sub-items and then moving down
+the hierarchical levels:
+\begin{itemize}
+\item The \texttt{subitem} entry was adjusted, moving it from a
+sub-entry to a top-level entry. The \field{name} field was then
+modified to
+\begin{verbatim}
+name={\bibglsflattenedchildpostsort{item}{subitem}}
+\end{verbatim}
+This now means that the \texttt{subsubitem} entry is now a sub-entry
+(rather than a sub-sub-entry). The \texttt{subitem} entry now has no
+parent, but at this stage the \texttt{subsubitem} entry still has
+\texttt{subitem} as its parent.
+\item The \texttt{subsubitem} entry is then adjusted moving from a
+sub-entry to a top-level entry. The \field{name} field was then
+modified to
+\begin{verbatim}
+name=
+{%
+ \bibglsflattenedchildpostsort
+ {%
+ % name from former parent
+ \bibglsflattenedchildpostsort{item}{subitem}%
+ }%
+ {subsubitem}% original name
+}
+\end{verbatim}
+The first argument of \csref{bibglsflattenedchildpostsort} is
+obtained from the \field{name} field of the entry's former parent
+(which is removed from the child's set of ancestors). This field
+value was changed in the previous step, and the change is
+reflected here.
+
+This means that the name for \texttt{subitem} will be displayed as
+\qt{item, subitem} and the name for \texttt{subsubitem} will be
+displayed as \qt{item, subitem, subsubitem}.
+
+\item The parent entries \texttt{item} and \texttt{subitem}
+are removed from the selection as they have no location lists.
+\end{itemize}
+
+Note that the \texttt{cabbage} sub-entry hasn't been adjusted. It
+doesn't have any siblings but its parent entry (\texttt{vegetable})
+has a location list so it can't be discarded.
+If I change the rule:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries.bib},
+ flatten-lonely-rule=discard unrecorded,
+ flatten-lonely=postsort]
+\end{verbatim}
+then this will move the \texttt{cabbage} entry up a level but the
+original parent entry \texttt{vegetable} will remain:
+\begin{description}\setlength\itemsep{0pt}%
+\item[A] \null
+\item[aardvark] 1
+\item[B] \null
+\item[bard] 1
+\item[birds, duck] 1
+\item[buzz] 1
+\item[I] \null
+\item[item, subitem, subsubitem] 1
+\item[M] \null
+\item[minerals] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[amber] 1
+ \item[corundum] 1
+ \item[quartz] 1
+ \end{description}
+\item[V] \null
+\item[vegetable] 1
+\item[vegetable, cabbage] 1
+\end{description}
+
+Remember that \csopt[postsort]{flatten-lonely} performs the
+adjustment after sorting. This means that the entries are still in
+the same relative location that they were in with the original
+\csopt[false]{flatten-lonely} setting. For example, \texttt{duck}
+remains in the B letter group before \qt{buzz}.
+
+With \csopt[presort]{flatten-lonely} the adjustments are made before
+the sorting is performed. For example, using:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries.bib},
+ flatten-lonely-rule=discard unrecorded,
+ flatten-lonely=presort]
+\end{verbatim}
+the hierarchical order is now:
+\begin{description}\setlength\itemsep{0pt}%
+\item[A] \null
+\item[aardvark] 1
+\item[B] \null
+\item[bard] 1
+\item[buzz] 1
+\item[C] \null
+\item[cabbage] 1
+\item[D] \null
+\item[duck] 1
+\item[M] \null
+\item[minerals] \mbox{}
+ \begin{description}\setlength\itemsep{0pt}%
+ \item[amber] 1
+ \item[corundum] 1
+ \item[quartz] 1
+ \end{description}
+\item[S] \null
+\item[subsubitem] 1
+\item[V] \null
+\item[vegetable] 1
+\end{description}
+This method uses a different format for the modified \field{name}
+field. For example, the \texttt{duck} entry now has:
+\begin{verbatim}
+name={\bibglsflattenedchildpresort{duck}{birds}}
+\end{verbatim}
+The default definition of \csref{bibglsflattenedchildpresort} simply
+does the first argument and ignores the second. The sorting is then
+performed, but the interpreter recognises this command and can
+deduce that the sort value for this entry should be \texttt{duck},
+so \qt{duck} now ends up in the D letter group.
+
+If you provide a definition of \cs{bibglsflattenedchildpresort} in
+the \atentryref{preamble}, it will be picked up by the interpreter.
+For example:
+\begin{verbatim}
+@preamble{"\providecommand{\bibglsflattenedchildpresort}[2]{#1 (#2)}"}
+\end{verbatim}
+
+Note that the \field{text} field is only changed if not already set.
+This option may have unpredictable results for abbreviations as the
+\field{name} field (and sometimes the \field{text} field) is
+typically set by the abbreviation style. Remember that
+if the parent entry doesn't have a location list and the rule isn't
+set to \optfmt{no discard} then the parent entry will be discarded
+after all relevant entries and their dependencies have been
+selected, so any cross-references within the parent entry (such as
+\cs{gls} occurring in the description) may end up being selected
+even if they wouldn't be selected if the parent entry didn't exist.
+
+With both \optfmt{presort} and \optfmt{postsort},
+if the parent \field{name} is the same as the child's \field{name}
+then the child is considered a homograph and
+the child's name is set to
+\begin{alltt}
+\csref{bibglsflattenedhomograph}\margm{name}\margm{parent label}
+\end{alltt}
+instead of the corresponding \csfmt{bibglsflattenedchild...sort}.
+This defaults to just \meta{name}.
+
+
+\subsection{\csoptnv{flatten-lonely-rule}\csopteqval{value}}
+\labelopt{flatten-lonely-rule}
+
+This option governs the rule used by \csopt{flatten-lonely} to
+determine which sub-entries (that have no siblings) to adjust and
+which parents to remove. The value may be one of the following:
+\begin{description}
+\item[\optfmt{only unrecorded parents}] Only the sub-entries
+that have a parent without a location list will be altered.
+The parent entry will be removed from the selection.
+This value is the default setting.
+\item[\optfmt{discard unrecorded}] This setting will adjust all
+sub-entries that have no siblings regardless of whether or not the
+parent has a location list.
+Only the parent entries that don't have a location list will be
+removed from the selection.
+\item[\optfmt{no discard}] This setting will adjust all
+sub-entries that have no siblings regardless of whether or not the
+parent has a location list. No entries will be discarded, so parent
+entries that don't have a location list will still appear in the
+glossary.
+\end{description}
+In the above, the location list includes records and
+cross-references obtained from the \field{see} or \field{seealso}
+fields. See \optref{flatten-lonely} for further details.
+
+\section{Master Documents}
+\label{sec:master}
+
+Suppose you have two documents \filefmt{mybook.tex} and
+\filefmt{myarticle.tex} that share a common glossary that's shown
+in \filefmt{mybook.pdf} but not in \filefmt{myarticle.pdf}.
+Furthermore, you'd like to use \sty{hyperref} and be able to click
+on a term in \filefmt{myarticle.pdf} and be taken to the relevant
+page in \filefmt{mybook.pdf} where the term is listed in the
+glossary.
+
+This can be achieved with the \catattr{targeturl} and
+\catattr{targetname} category attributes. For example, without
+\bibgls\ the file \filefmt{mybook.tex} might look like:
+\begin{verbatim}
+\documentclass{book}
+\usepackage[colorlinks]{hyperref}
+\usepackage{glossaries-extra}
+
+\makeglossaries
+
+\newglossaryentry{sample}{name={sample},description={an example}}
+
+\begin{document}
+\chapter{Example}
+\gls{sample}.
+
+\printglossaries
+\end{document}
+\end{verbatim}
+The other document \filefmt{myarticle.tex} might look like:
+\begin{verbatim}
+\documentclass{article}
+\usepackage[colorlinks]{hyperref}
+\usepackage{glossaries-extra}
+
+\newignoredglossary*{external}
+\glssetcategoryattribute{external}{targeturl}{mybook.pdf}
+\glssetcategoryattribute{external}{targetname}{\glolinkprefix\glslabel}
+
+\newglossaryentry{sample}{type=external,category=external,
+ name={sample},description={an example}}
+
+\begin{document}
+\gls{sample}.
+\end{document}
+\end{verbatim}
+In this case the \optfmt{main} glossary isn't used, but the category
+attributes allow a mixture of internal and external references, so
+the \optfmt{main} glossary could be used for the internal
+references. (In which case, \csfmt{makeglossaries} and
+\csfmt{printglossaries} would need to be added back to
+\filefmt{myarticle.tex}.)
+
+Note that both documents had to define the common terms. The above
+documents can be rewritten to work with \bibgls. First a \ext{bib}
+file needs to be created:
+\begin{verbatim}
+@entry{sample,
+ name={sample},
+ description={an example}
+}
+\end{verbatim}
+Assuming this file is called \filefmt{myentries.bib}, then
+\filefmt{mybook.tex} can be changed to:
+\begin{verbatim}
+\documentclass{book}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[src={myentries}]
+
+\begin{document}
+\chapter{Example}
+\gls{sample}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+and \filefmt{myarticle.tex} can be changed to:
+\begin{verbatim}
+\documentclass{article}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record]{glossaries-extra}
+
+\newignoredglossary*{external}
+\glssetcategoryattribute{external}{targeturl}{mybook.pdf}
+\glssetcategoryattribute{external}{targetname}{\glolinkprefix\glslabel}
+
+\GlsXtrLoadResources[
+ src={myentries},
+ sort=none,
+ type=external,
+ category=external]
+
+\begin{document}
+\gls{sample}.
+\end{document}
+\end{verbatim}
+Most of the options related to sorting and the glossary format are
+unneeded here since the glossary isn't being displayed. This may be
+sufficient for your needs, but it may be that the book has changed
+various settings that have been written to \filefmt{mybook.glstex}
+but aren't present in the \ext{bib} file (such as
+\optref[uc]{short-case-change}). In this case, you could just remember to copy
+over the settings from \filefmt{mybook.tex} to
+\filefmt{myarticle.tex}, but
+another possibility is to simply make \filefmt{myarticle.tex} input
+\filefmt{mybook.glstex} instead of using \cs{GlsXtrLoadResources}. This
+can work but it's not so convenient to set the label prefix, the
+type and the category. The \optfmt{master} option allows this, but
+it has limitations (see below), so in complex cases (in particular
+different label prefixes combined with hierarchical entries or cross-references) you'll have to use
+the method shown in the example code above.
+
+\subsection{\csoptnv{master}\csopteqval{name}}
+\labelopt{master}
+
+This option will disable most of the options that relate to
+parsing and processing data contained in \ext{bib} files
+(since this option doesn't actually read any \ext{bib} files).
+
+The use of \optfmt{master} isn't always suitable. In particular
+if any of the terms cross-reference each other, such as through
+the \field{see} or \field{seealso} field or the \field{parent} field or
+using commands like \cs{gls} in any of the other fields when
+the labels have been assigned prefixes. In this
+case you will need to use the method described in the example above.
+
+The \meta{name} is the name of the \ext{aux} file for the master
+document without the extension (in this case, \filefmt{mybook}). It
+needs to be relative to the document referencing it or an absolute
+path using forward slashes as the directory divider. Remember that
+if it's a relative path, the PDF files (\filefmt{mybook.pdf} and
+\filefmt{myarticle.pdf}) will also need to be located in the same
+relative position.
+
+When \bibgls\ detects the \csopt{master} option, it won't search for
+entries in any \ext{bib} files (for that particular resource set)
+but will create a \ext{glstex} file that inputs the master
+document's
+\ext{glstex} files, but it will additionally temporarily
+adjust the internal commands used to define entries so that
+the prefix given by \optref{label-prefix}, the glossary type and the
+category type are all automatically inserted. If the \optref{type}
+or \optref{category} options haven't been used, the corresponding
+value will default to \optfmt{master}. The \catattr{targeturl}
+and \catattr{targetname} category attributes will automatically be
+set, and the glossary type will be provided using
+\cs{provideignoredglossary*}\margm{type}.
+
+The above \filefmt{myarticle.tex} can be changed to:
+\begin{verbatim}
+\documentclass{article}
+\usepackage[colorlinks]{hyperref}
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ label-prefix={book.},
+ master={mybook}]
+
+\begin{document}
+\gls{book.sample}.
+\end{document}
+\end{verbatim}
+
+There are some settings from the master document that you
+still need to repeat in the other document. These include
+the label prefixes set when the master document loaded
+the resource files, and any settings in the master document
+that relate to the master document's entries.
+
+For example, if the master document loaded a resource file
+with \optref[term.]{label-prefix} then you also need this
+prefix when you reference the entries in the dependent document
+in addition to the \optfmt{label-prefix} for the dependent document.
+Suppose \filefmt{mybook.tex} loads the resources using
+\begin{verbatim}
+\GlsXtrLoadResources[src={myentries},label-prefix={term.}]
+\end{verbatim}
+and \filefmt{myarticle.tex} loads the resources using:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ label-prefix={book.},
+ master={mybook}]
+\end{verbatim}
+Then the entries referenced in \filefmt{myarticle.tex} need
+to use the prefix \optfmt{book.term.}\ as in:
+\begin{verbatim}
+This is a \gls{book.term.sample} term.
+\end{verbatim}
+
+Remember that the category labels will need adjusting to reflect the
+change in category label in the dependent document.
+
+For example, if \filefmt{mybook.tex} included:
+\begin{verbatim}
+\setabbreviationstyle{long-short-sc}
+\end{verbatim}
+then \filefmt{myarticle.tex} will need:
+\begin{verbatim}
+\setabbreviationstyle[master]{long-short-sc}
+\end{verbatim}
+(change \optfmt{master} to \meta{value} if you have used
+\optref[\meta{value}]{category}). You can, of course, choose
+a different abbreviation style for the dependent document,
+but the category in the optional argument needs to be correct.
+
+\subsection{\csoptnv{master-resources}\csopteqval{list}}
+\labelopt{master-resources}
+
+If the master document has multiple resource files
+then by default all that document's
+\ext{glstex} files will be input. If you don't want them all
+you can use \optfmt{master-resources} to specify
+only those files that should be included. The value \meta{list} is
+a comma-separated list of names, where each name corresponds
+to the final argument of \csref{glsxtrresourcefile}.
+Remember that \cs{GlsXtrLoadResources} is just a shortcut
+for \cs{glsxtrresourcefile} that bases the name on \cs{jobname}.
+(Note that, as with the argument of \cs{glsxtrresourcefile},
+the \ext{glstex} extension should not be included.) The file
+\primaryresourcefmt\ is considered the primary
+resource file and the files \suppresourcefmt{\meta{n}}
+(starting with \meta{n} equal to 1) are considered the supplementary resource files.
+
+For example, to just select the first and third of the
+supplementary resource files (omitting the primary
+\filefmt{mybook.glstex}):
+\begin{verbatim}
+\GlsXtrLoadResources[
+ master={mybook},
+ master-resources={mybook-1,mybook-3}
+]
+\end{verbatim}
+
+\section{Field and Label Options}
+\label{sec:labelopts}
+
+\subsection{\csoptnv{ignore-fields}\csopteqval{list}}
+\labelopt{ignore-fields}
+
+The \csopt{ignore-fields} key indicates that you want \bibgls\ to
+skip the fields listed in the supplied comma-separated \meta{list} of field
+labels. Remember that unrecognised fields will always be skipped.
+
+For example, suppose my \ext{bib} file contains
+\begin{verbatim}
+@abbreviation{html,
+ short ="html",
+ long = {hypertext markup language},
+ description={a markup language for creating web pages},
+ seealso={xml}
+}
+\end{verbatim}
+but I want to use the \abbrstyle{short-long} style and I don't want
+the cross-referenced term, then I can use
+\csopt[seealso,description]{ignore-fields}.
+
+Note that \csopt[parent]{ignore-fields} removes the \field{parent}
+before determining the dependency lists. This means that
+\optref[recorded and deps]{selection} and
+\optref[recorded and ancestors]{selection} won't pick up the
+label in the \field{parent} field.
+
+If you want to maintain the dependency and ancestor relationship but
+omit the \field{parent} field when writing the entries to the
+\ext{glstex} file, you need to use \optref{flatten} instead.
+
+\subsection{\csoptnv{category}\csopteqval{value}}
+\labelopt{category}
+
+The selected entries may all have their \field{category} field
+changed before writing their definitions to the \ext{glstex} file.
+The \meta{value} may be:
+\begin{itemize}
+\item \optfmt{same as entry}: set the
+\field{category} to the \ext{bib} entry type used to define it
+(without the leading \texttt{@});
+\item \optfmt{same as type}: set the \field{category} to the same
+value as the \field{type} field (if that field has been provided
+either in the \ext{bib} file or through the \optref{type} option);
+\item \meta{label}: the \field{category} is set to
+\meta{label} (which mustn't contain any special characters).
+\end{itemize}
+This will override any
+\field{category} fields supplied in the \ext{bib} file.
+
+For example, if the \ext{bib} file contains:
+\begin{verbatim}
+@entry{bird,
+ name={bird},
+ description = {feathered animal}
+}
+
+@index{duck}
+
+@index{goose,plural="geese"}
+
+@dualentry{dog,
+ name={dog},
+ description={chien}
+}
+\end{verbatim}
+then if the document contains
+\begin{verbatim}
+\GlsXtrLoadResources[category={same as entry},src={entries}]
+\end{verbatim}
+this will set the \field{category} of the \texttt{bird} field to
+\optfmt{entry} (since it was defined with \cs{entry}), the \field{category} of the \texttt{duck} and
+\texttt{goose} entries to \optfmt{index} (since they were defined
+with \atentry{index}), and the \field{category} of the \texttt{dog}
+entry to \optfmt{dualentry} (since it was
+defined with \atentry{dualentry}). Note that the dual entry
+\texttt{dual.dog} doesn't have the category set, since that's
+governed by \optref{dual-category} instead.
+
+If, instead, the document contains
+\begin{verbatim}
+\GlsXtrLoadResources[category={animals},src={entries}]
+\end{verbatim}
+then the \field{category} of all the primary selected entries will
+be set to \optfmt{animals}. Again the dual entry \texttt{dual.dog}
+doesn't have the \field{category} set.
+
+Note that the categories may be overridden by the commands,
+such as \csref{bibglsnewindex}, that are used to actually define the
+entries.
+
+For example, if the document contains
+\begin{verbatim}
+\newcommand{\bibglsnewdualentry}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},#2,category={dual}}{#4}%
+}
+
+\GlsXtrLoadResources[category={animals},src={entries}]
+\end{verbatim}
+then both the \texttt{dog} and \texttt{dual.dog} entries will
+have their \field{category} field set to \optfmt{dual} since the
+new definition of \cs{bibglsnewdualentry} has overridden
+the \csopt[animals]{category} option.
+
+\subsection{\csoptnv{type}\csopteqval{value}}
+\labelopt{type}
+
+The \meta{value} may be \optfmt{same as entry} or a glossary label.
+This is similar to the \optref{category} option except that
+it sets the \field{type} field. As with the \csopt{category} option,
+\csopt[same as entry]{type} indicates that the entry
+type should be used. There is no \meta{value} analogous to
+\csopt[same as type]{category}.
+
+Make sure that the glossary type has already been defined.
+
+Note that this setting only changes the \field{type} field for
+primary entries. Use \optref{dual-type} for dual entries.
+
+For example:
+\begin{verbatim}
+\usepackage[record,symbols]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries-symbols},type=symbols]
+\end{verbatim}
+
+Remember that you can use the starred version of \cs{newglossary}
+if you don't want to worry about the extensions needed by
+\app{makeindex} or \app{xindy}. For example:
+\begin{verbatim}
+\usepackage[record,nomain]{glossaries-extra}
+
+\newglossary*{dictionary}{Dictionary}
+
+\GlsXtrLoadResources[src={entries-symbols},type=dictionary]
+\end{verbatim}
+(The \styopt{nomain} option was added to suppress the
+creation of the default \texttt{main} glossary.)
+
+Alternatively you can use \cs{newignoredglossary} if you don't
+want the glossary picked up by \cs{printunsrtglossaries}.
+
+
+\subsection{\csoptnv{label-prefix}\csopteqval{tag}}
+\labelopt{label\dhyphen prefix}
+
+The \csopt{label-prefix} option prepends \meta{tag} to each
+entry's label. This \meta{tag} will also be inserted in front of any
+cross-references, unless they start with \idprefix{dual} or
+\idprefix{ext\meta{n}} (where \meta{n} is an integer).
+
+For example, if the \ext{bib} file contains
+\begin{verbatim}
+@entry{bird,
+ name={bird},
+ description = {feathered animal, such as a \gls{duck} or \gls {goose}}
+}
+
+@entry{waterfowl,
+ name={waterfowl},
+ description={Any \gls{bird} that lives in or about water},
+ see={[see also]{duck,goose}}
+}
+
+@index{duck}
+
+@index{goose,plural="geese"}
+\end{verbatim}
+Then if this \ext{bib} file is loaded with \csopt[gls.]{label-prefix}
+it's as though the entries had been defined as:
+\begin{verbatim}
+@entry{gls.bird,
+ name={bird},
+ description = {feathered animal, such as a \gls{gls.duck} or
+\gls{gls.goose}}
+}
+
+@entry{gls.waterfowl,
+ name={waterfowl},
+ description={Any \gls{gls.bird} that lives in or about water},
+ see={[see also]{gls.duck,gls.goose}}
+}
+
+@index{gls.duck,name={duck}}
+
+@index{gls.goose,name={goose},plural="geese"}
+\end{verbatim}
+
+Remember to use this prefix when you reference the terms in the
+document with commands like \cs{gls}.
+
+\subsection{\csoptnv{ext-prefixes}\csopteqval{list}}
+\labelopt{ext-prefixes}
+
+Any cross-references in the \ext{bib} file that start with
+\idprefix{ext\meta{n}} (where \meta{n} is a positive integer) will be
+substituted with the \meta{n}th tag listed in the comma-separated
+\meta{list}. If there aren't that many items in the list, the
+\idprefix{ext\meta{n}} will simply be removed. The default setting is
+an empty list, which will strip all \idprefix{ext\meta{n}} prefixes.
+
+For example, suppose the file \filefmt{entries-terms.bib} contains:
+\begin{verbatim}
+@entry{set,
+ name={set},
+ description={collection of values, denoted \gls{ext1.set}}
+}
+\end{verbatim}
+and the file \filefmt{entries-symbols.bib} contains:
+\begin{verbatim}
+@symbol{set,
+ name={\ensuremath{\mathcal{S}}},
+ description={a \gls{ext1.set}}
+}
+\end{verbatim}
+
+These files both contain an entry with the label \texttt{set}
+but the description includes \verb|\gls{ext1.set}| which is
+referencing the entry from the other file. These
+two files can be loaded without conflict using:
+\begin{verbatim}
+\usepackage[record,symbols]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries-terms},
+ label-prefix={gls.},
+ ext-prefixes={sym.}
+]
+
+\GlsXtrLoadResources[src={entries-symbols},
+ type=symbols,
+ label-prefix={sym.},
+ ext-prefixes={gls.}
+]
+\end{verbatim}
+
+Now the \texttt{set} entry from \filefmt{entries-terms.bib}
+will be defined with the label \texttt{gls.set} and the
+description will be
+\begin{verbatim}
+collection of values, denoted \gls{sym.set}
+\end{verbatim}
+The \texttt{set} entry
+from \filefmt{entries-symbols.bib} will be defined with the label
+\texttt{sym.set} and the description will be
+\begin{verbatim}
+a \gls{gls.set}
+\end{verbatim}
+
+Note that in this case the \ext{bib} files have to be loaded
+as two separate resources. They can't be combined into a
+single \optref{src} list as the labels aren't unique.
+
+If you want to allow the flexibility to choose between
+loading them together or separately, you'll have to give them
+unique labels. For example, \filefmt{entries-terms.bib} could
+contain:
+\begin{verbatim}
+@entry{set,
+ name={set},
+ description={collection of values, denoted \gls{ext1.S}}
+}
+\end{verbatim}
+and \filefmt{entries-symbols.bib} could contain:
+\begin{verbatim}
+@symbol{S,
+ name={\ensuremath{\mathcal{S}}},
+ description={a \gls{ext1.set}}
+}
+\end{verbatim}
+Now they can be combined with:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries-terms,entries-symbols}]
+\end{verbatim}
+which will simply strip the \idprefixfmt{ext1} prefix from the
+cross-references. Alternatively:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries-terms,entries-symbols},
+ label-prefix={gls.},
+ ext-prefixes={gls.}
+]
+\end{verbatim}
+which will insert the supplied \optref{label-prefix} at the
+start of the labels in the entry definitions and will replace
+the \idprefix{ext1} prefix with \idprefixfmt{gls} in the
+cross-references.
+
+\subsection{\csoptnv{short-case-change}\csopteqval{value}}
+\labelopt{short-case-change}
+
+The value of the \field{short} field may be automatically converted
+to upper or lower case. This option may take one of the following
+values:
+\begin{itemize}
+\item \optfmt{none}: don't apply any case-changing (default);
+\item \optfmt{lc}: convert to lower case;
+\item \optfmt{uc}: convert to upper case;
+\item \optfmt{lc-cs}: convert to lower case using
+\cs{MakeTextLowercase};
+\item \optfmt{uc-cs}: convert to upper case using
+\cs{MakeTextUppercase}.
+\end{itemize}
+
+For example, if the \ext{bib} file contains
+\begin{verbatim}
+@abbreviation{html,
+ short = "html",
+ long = "hypertext markup language"
+}
+\end{verbatim}
+then \csopt[uc]{short-case-change} would convert the value of the
+\field{short} field into
+\begin{verbatim}
+HTML
+\end{verbatim}
+whereas \csopt[uc-cs]{short-case-change} would convert it to
+\begin{verbatim}
+\MakeTextUppercase{html}
+\end{verbatim}
+In the case of \csopt[uc]{short-case-change} and \csopt[lc]{short-case-change}
+only tokens that are recognised as characters will be converted.
+For example, suppose I have a slightly more eccentric definition:
+\begin{verbatim}
+@abbreviation{html,
+ short = "ht\emph{ml}",
+ long = "hypertext markup language"
+}
+\end{verbatim}
+then \csopt[uc]{short-case-change} would convert the value of the
+\field{short} field into:
+\begin{verbatim}
+HT\emph{ML}
+\end{verbatim}
+Note that \cs{emph} isn't modified as it's recognised as a command.
+There's no attempt at interpreting the contents at this point (but
+the value may later be interpreted during sorting).
+
+For example, suppose an abbreviation is defined using:
+\begin{verbatim}
+short = "z\ae\oe",
+\end{verbatim}
+then with \csopt[uc]{short-case-change}, this would be converted to
+\begin{verbatim}
+Z\ae\oe
+\end{verbatim}
+since the interpreter isn't being used at this stage. If the
+interpreter is later used during sorting, the sort value will be set to
+\texttt{Z\ae\oe}.
+
+However, with \csopt[uc-cs]{short-case-change}, the \field{short}
+value would be converted to
+\begin{verbatim}
+\MakeTextUppercase{z\ae\oe}
+\end{verbatim}
+If the interpreter is used during sorting, the sort value will be set to
+\texttt{Z\AE\OE}.
+
+You can use \cs{NoCaseChange}\margm{text} to prevent the given \meta{text}
+from having the case changed. For example, if the \field{short}
+field is defined as
+\begin{verbatim}
+short = {a\NoCaseChange{bc}d}
+\end{verbatim}
+then with \csopt[uc]{short-case-change}, this would be converted to
+\begin{verbatim}
+A\NoCaseChange{bc}D
+\end{verbatim}
+(This command is provided by \sty{textcase}, which is automatically
+loaded by \sty{glossaries}.)
+
+If you have a command that takes a label or identifier as an argument then it's
+best to hide the label in a custom command. For example, if the
+\field{short} field in the \ext{bib} definition is defined as:
+\begin{verbatim}
+ short = "ht\textcolor{red}{ml}",
+\end{verbatim}
+then with \csopt[uc]{short-case-change} this would end up as:
+\begin{verbatim}
+HT\textcolor{RED}{ML}
+\end{verbatim}
+which is incorrect. Instead, provide a command that hides the label
+(such as the \csfmt{strong} example described on page~\pageref{cs.strong}).
+
+See \optref{dual-short-case-change} to adjust the \field{dualplural}
+field.
+
+\subsection{\csoptnv{group}\csopteqval{value}}
+\labelopt{group}
+
+This option may only be used with the \argref{group} switch.
+This will set the \field{group} field to \meta{value} unless
+\meta{value} is \optfmt{auto}, in which case the value is
+set automatically during the sorting.
+For example:
+\begin{verbatim}
+\GlsXtrLoadResources[sort=integer,group={Constants},
+ src={entries-constants}% data in entries-constants.bib
+]
+\GlsXtrLoadResources[sort=letter-case,group={Variables},
+ src={entries-variables}% data in entries-variables.bib
+]
+\end{verbatim}
+If the \field{type} field hasn't been set in the \ext{bib} files,
+these entries will be added to the same glossary, but will
+be grouped according to each instance of \cs{GlsXtrLoadResources},
+with the provided group label.
+The default behaviour is \csopt[auto]{group}.
+
+\subsection{\csoptnv{save-child-count}\csopteqval{boolean}}
+\labelopt{save-child-count}
+
+This is a boolean option. The default setting is
+\csopt[false]{save-child-count}.
+If \csopt[true]{save\dhyphen child\dhyphen count},
+each entry will be assigned a field called \texttt{childcount} with
+the value equal to the number of child entries that have been
+selected.
+
+The assignment is done using \cs{GlsXtrSetField} so there's
+no associated key.
+For example, suppose \filefmt{entries.bib} contains:
+\begin{verbatim}
+@index{birds}
+@index{duck,parent={birds}}
+@index{goose,plural={geese},parent={birds}}
+@index{swan,parent={birds}}
+
+@index{minerals}
+@index{quartz,parent={minerals}}
+@index{corundum,parent={minerals}}
+@index{amber,parent={minerals}}
+@index{gypsum,parent={minerals}}
+@index{gold,parent={minerals}}
+\end{verbatim}
+and the document contains:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[record,style=indexgroup]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries},save-child-count]
+
+\begin{document}
+\gls{duck} and \gls{goose}.
+\gls{quartz}, \gls{corundum}, \gls{amber}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+Then the \ext{glstex} file will contain:
+\begin{verbatim}
+\GlsXtrSetField{birds}{childcount}{2}
+\GlsXtrSetField{duck}{childcount}{0}
+\GlsXtrSetField{goose}{childcount}{0}
+\GlsXtrSetField{minerals}{childcount}{3}
+\GlsXtrSetField{amber}{childcount}{0}
+\GlsXtrSetField{corundum}{childcount}{0}
+\GlsXtrSetField{quartz}{childcount}{0}
+\end{verbatim}
+Note that although \texttt{birds} has three children defined in the
+\ext{bib} file, only two have been selected, so the child count is
+set to 2. Similarly the \texttt{minerals} entry has five children
+defined in the \ext{bib} file, but only three have been selected, so
+the child count is 3.
+
+The following uses the post-description hook to show the child count
+in parentheses:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries},category=general,save-child-count]
+
+\renewcommand{\glsxtrpostdescgeneral}{%
+ \glsxtrifhasfield{childcount}{\glscurrententrylabel}
+ { (child count: \glscurrentfieldvalue.)}%
+ {}%
+}
+\end{verbatim}
+(\cs{glsxtrifhasfield} requires at least \sty{glossaries-extra} v1.19.
+It's slightly more efficient that \cs{ifglshasfield} provided by
+the base \sty{glossaries} package, and it doesn't complain if the
+entry or field don't exist, but note that \cs{glsxtrifhasfield}
+implicitly scopes its content. Use the starred version to omit the
+grouping.)
+
+\section{Plurals}
+\label{sec:plurals}
+
+Some languages, such as English, have a general rule that plurals
+are formed from the singular with a suffix appended. This isn't
+an absolute rule. There are plenty of exceptions (for example,
+geese, children, churches, elves, fairies, sheep, mice), so a
+simplistic approach of just doing \texttt{\cs{gls}\margm{label}[s]}
+will sometimes produce inappropriate results, so the \sty{glossaries}
+package provides a \field{plural} key with the corresponding command
+\cs{glspl}.
+
+In some cases a plural may not make any sense (for example, if the
+term is a verb or symbol), so the \field{plural} key is optional, but to
+make life easier for languages where the majority of plurals can
+simply be formed by appending a suffix to the singular, the
+\sty{glossaries} package lets the \field{plural} field default
+to the value of the \field{text} field with \cs{glspluralsuffix}
+appended. This command is defined to be just the letter \qt{s}.
+This means that the majority of terms in such languages don't need to have the
+\field{plural} supplied as well, and you only need to use it for the
+exceptions.
+
+For languages that don't have this general rule, the \field{plural}
+field will always need to be supplied for nouns.
+
+There are other plural fields, such as \field{firstplural},
+\field{longplural} and \field{shortplural}. Again, if you are using
+a language that doesn't have a simple suffix rule, you'll have to
+supply the plural forms if you need them (and if a plural makes
+sense in the context).
+
+If these fields are omitted, the \sty{glossaries} package follows
+these rules:
+\begin{itemize}
+\item If \field{firstplural} is missing, then \cs{glspluralsuffix}
+is appended to the \field{first} field, if that field has been
+supplied. If the \field{first} field hasn't been supplied but the
+\field{plural} field has been supplied, then the \field{firstplural}
+field defaults to the \field{plural} field. If the \field{plural}
+field hasn't been supplied, then both the \field{plural} and
+\field{firstplural} fields default to the \field{text} field (or
+\field{name}, if no \field{text} field) with \cs{glspluralsuffix}
+appended.
+
+\item If the \field{longplural} field is missing, then
+\cs{glspluralsuffix} is appended to the \field{long} field, if the
+\field{long} field has been supplied.
+
+\item If the \field{shortplural} field is missing then, \emph{with
+the base \sty{glossaries} acronym mechanism}, \cs{acrpluralsuffix}
+is appended to the \field{short} field.
+
+\end{itemize}
+
+The last case is different with the \sty{glossaries-extra} extension
+package. The \field{shortplural} field defaults to the \field{short}
+field with \cs{abbrvpluralsuffix} appended \emph{unless overridden
+by category attributes}. This suffix command is set by the
+abbreviation styles. This means that every time an abbreviation
+style is implemented, \cs{abbrvpluralsuffix} is redefined. Most
+styles simply define this command as:
+\begin{verbatim}
+\renewcommand*{\abbrvpluralsuffix}{\glsxtrabbrvpluralsuffix}
+\end{verbatim}
+where \cs{glsxtrabbrvpluralsuffix} expands to \cs{glspluralsuffix}.
+The \qt{sc} styles (such as \abbrstyle{long-short-sc}) use a different
+definition:
+\begin{verbatim}
+\renewcommand*{\abbrvpluralsuffix}{\protect\glsxtrscsuffix}
+\end{verbatim}
+This allows the suffix to be reverted back to the upright font,
+counter-acting the affect of the small-caps font.
+
+This means that if you want to change or strip the suffix used for
+the plural short form, it's usually not sufficient to redefine
+\cs{abbrvpluralsuffix}, as the change will be undone the next time
+the style is applied. Instead, for a document-wide solution, you
+need to redefine \cs{glsxtrabbrvpluralsuffix}. Alternatively you can
+use the category attributes.
+
+There are two attributes that affect the short plural suffix
+formation. The first is \catattr{aposplural} which uses the suffix
+\begin{verbatim}
+'\abbrvpluralsuffix
+\end{verbatim}
+That is, an apostrophe followed by \cs{abbrvpluralsuffix} is
+appended. The second attribute is \catattr{noshortplural} which
+suppresses the suffix and simply sets \field{shortplural} to the
+same as \field{short}.
+
+With \bibgls, if you have some abbreviations where the plural should
+have a suffix and some where the plural shouldn't have a suffix
+(for example, the document has both English and French abbreviations)
+then there are two approaches.
+
+The first approach is to use the category attributes. For example:
+\begin{verbatim}
+\glssetcategoryattribute{french}{noshortplural}
+\end{verbatim}
+Now just make sure all the French abbreviations are have their
+\field{category} field set to \optfmt{french}:
+\begin{verbatim}
+\GlsXtrLoadResources[src={fr-abbrvs},category={french}]
+\end{verbatim}
+
+The other approach is to use the options listed below.
+
+\subsection{\csoptnv{short-plural-suffix}\csopteqval{value}}
+\labelopt{short-plural-suffix}
+
+Sets the plural suffix for the default \field{shortplural} to \meta{value}. If
+this option is omitted or if
+\csopt[use-default]{short\dhyphen plural-suffix}, then \bibgls\ will leave
+it to \sty{glossaries-extra} to determine the appropriate default.
+If the \meta{value} is omitted or empty, the suffix is set to empty.
+
+\subsection{\csoptnv{dual-short-plural-suffix}\csopteqval{value}}
+\labelopt{dual-short-plural-suffix}
+
+Sets the plural suffix for the default \field{dualshortplural} field to
+\meta{value}. If this option is omitted or if
+\csopt[use-default]{dual-short-plural-suffix}, then \bibgls\ will leave it to
+\sty{glossaries-extra} to determine the appropriate default.
+If the \meta{value} is omitted or empty, the suffix is set to empty.
+
+\section{Location List Options}
+\label{sec:locationopts}
+
+The \styopt{record} package option automatically adds two new keys:
+\field{loclist} and \field{location}. These two fields are set by
+\bibgls\ from the information supplied in the \ext{aux} file (unless
+the option \optref[false]{save-locations} is used). The
+\field{loclist} field has the syntax of an \sty{etoolbox} internal list
+and includes every location (except for the discarded duplicates and
+ignored formats).
+Each item in the list is provided in the form
+\begin{alltt}
+\cs{glsseeformat}\oargm{tag}\margm{label list}\marg{}
+\end{alltt}
+for the cross-reference supplied by the \field{see} field,
+\begin{alltt}
+\cs{glsxtruseseealsoformat}\margm{label list}
+\end{alltt}
+for the cross-reference supplied by the \field{seealso} field,
+and
+\begin{alltt}
+\cs{glsnoidxdisplayloc}\margm{prefix}\margm{counter}\margm{format}\margm{location}
+\end{alltt}
+for the locations. You can iterate through the \field{loclist} value
+using one of \sty{etoolbox}'s internal list loops (either
+by first fetching the list using \cs{glsfieldfetch}
+or through \sty{glossaries-extra}'s \cs{glsxtrfielddolistloop}
+or \cs{glsxtrfieldforlistloop} shortcuts).
+
+The \meta{format} is that supplied by the \gencsopt{gls}{format} key
+when using commands like \cs{gls} or \cs{glsadd} (the encapsulator or encap in
+\appfmt{makeindex} parlance). If omitted,
+\gencsopt[glsnumberformat]{gls}{format} is assumed (unless this
+default value is changed with \cs{GlsXtrSetDefaultNumberFormat},
+provided by \sty{glossaries-extra} v1.19+).
+
+Ranges can be explicitly formed using the parenthetical encap
+syntax \glsopt[(]{format} and
+\glsopt[)]{format} or \glsopt[(\meta{csname}]{format} and
+\glsopt[)\meta{csname}]{format} (where \meta{csname} is the name of
+a text-block command without the initial backslash) in the optional
+argument of commands like \cs{gls} or \cs{glsadd}. These will always
+form a range, regardless of \optref{min-loc-range}, and will be
+encapsulated by \csref{bibglsrange}. (This command is not used with
+ranges that are formed by collating consecutive locations.)
+
+Explicit ranges don't merge with neighbouring locations, but will
+absorb any single locations within the range that don't conflict.
+(Conflicts will be moved to the start of the explicit range.)
+For example, if \verb|\gls{sample}| is used on page~1,
+\verb|\gls[format=(]{sample}| is used on page~2,
+\verb|\gls{sample}| is used on page~3, and
+\verb|\gls[format=)]{sample}| is used on page~4, then the location
+list will be 1, 2--4. The entry on page~3 is absorbed into the
+explicit range, but the range can't be expanded to include page~1.
+If the entry on page~3 had a different format to the explicit range,
+for example \verb|\gls[format=textbf]{sample}| then it would cause a
+warning and be moved before the start of the range so that the
+location list would then be 1, \textbf{3}, 2--4.
+
+The special format \gencsopt[glsignore]{glsadd}{format} is provided
+by the \styfmt{glossaries} package for cases where the location
+should be ignored. (The command \cs{glsignore} simply ignores its
+argument.) This works reasonably well if an entry only has the one
+location, but if the entry happens to be indexed again, it can lead
+to an odd empty gap in the location list with a spurious comma. If
+\bibgls\ encounters a record with this special format, the entry
+will be selected but the record will be discarded.
+
+This means that the location list will be empty if the entry was
+only indexed with \optfmt{glsignore}, but if the entry was also
+indexed with another format then the location list won't include the
+ignored record. (This format is used by \cs{glsaddallunused} but
+remember that iterative commands like this don't work with \bibgls.
+Instead, just use \optref[all]{selection} to select all entries.)
+
+For example, suppose you only want main matter locations in the
+number list, but you want entries that only appear in the back matter
+to still appear in the glossary (without a location list), then you could do:
+\begin{verbatim}
+\backmatter
+\GlsXtrSetDefaultNumberFormat{glsignore}
+\end{verbatim}
+(This command requires v1.19 of \sty{glossaries-extra}.) If you also
+want to drop front matter locations as well:
+\begin{verbatim}
+\frontmatter
+\GlsXtrSetDefaultNumberFormat{glsignore}
+...
+\mainmatter
+\GlsXtrSetDefaultNumberFormat{glsnumberformat}
+...
+\backmatter
+\GlsXtrSetDefaultNumberFormat{glsignore}
+\end{verbatim}
+
+Note that explicit range formations aren't discarded, so if
+\optfmt{glsignore} is used in a range, such as
+\begin{verbatim}
+\glsadd[format=(glsignore]{sample}
+...
+\glsadd[format=)glsignore]{sample}
+\end{verbatim}
+then the range will be included in the location list (encapsulated
+with \cs{glsignore}), but this case would be a rather odd use of
+this special format and is not recommended.
+
+The locations are always listed in the order in which they were indexed,
+(except for the cross-reference which may be placed at the start or
+end of the list or omitted).
+This is different to \app{xindy} and \app{makeindex} where you can
+specify the ordering (such as lower case Roman first, then digits,
+etc), but unlike those applications, \bibgls\ allows any location,
+although it may not be able to work out an integer representation.
+(With \app{xindy}, you can define new location formats, but you need
+to remember to add the appropriate code to the custom module.)
+
+It's possible to define a custom glossary style where
+\cs{glossentry} (and the child form \cs{subglossentry}) ignore the
+final argument (which will be the \field{location} field)
+and instead parse the \field{loclist} field and re-order the
+locations or process them in some other way. Remember that you can also use \cs{glsnoidxloclist}
+provided by \sty{glossaries}. For example:
+\begin{verbatim}
+\glsfieldfetch{gls.sample}{loclist}{\loclist}% fetch location list
+\glsnoidxloclist{\loclist}% iterate over locations
+\end{verbatim}
+This uses \cs{glsnoidxloclisthandler} as the list's handler
+macro, which simply displays each location separated by \cs{delimN}.
+(See also
+\href{http://www.dickimaw-books.com/latex/admin/html/foreachtips.shtml}{Iteration
+Tips and Tricks}.)
+
+Each location is listed in the \ext{aux} file in the form:
+\begin{alltt}
+\cs{glsxtr@record}\margm{label}\margm{prefix}\margm{counter}\margm{format}\margm{location}
+\end{alltt}
+Exact duplicates are discarded. For example, if \texttt{cat}
+is indexed twice on page 1:
+\begin{verbatim}
+\glsxtr@record{cat}{}{page}{glsnumberformat}{1}
+\glsxtr@record{cat}{}{page}{glsnumberformat}{1}
+\end{verbatim}
+then the second record is discarded. Only the first record is added
+to the location list.
+
+Partial duplicates, where all arguments match except for
+\meta{format}, may be discarded depending on the value
+of \meta{format}. For example, if page~1 of the document
+uses \verb|\gls{cat}| and \verb|\gls[format=hyperbf]{cat}|
+then the \ext{aux} file will contain:
+\begin{verbatim}
+\glsxtr@record{cat}{}{page}{glsnumberformat}{1}
+\glsxtr@record{cat}{}{page}{hyperbf}{1}
+\end{verbatim}
+This is a partial record match. In this case, \bibgls\
+makes the following tests:
+\begin{itemize}
+\item If one of the formats includes a range formation, the
+range takes precedence.
+
+\item If one of the formats is \texttt{glsnumberformat} (as in the
+above example) or \texttt{glsignore}, that format will be skipped.
+So in the above example, the second record will be added to the
+location list, but not the first. (A message will only be written to
+the transcript if the \longarg{debug} switch is used.) The default
+\texttt{glsnumberformat} will take precedence over the ignored
+format \texttt{glsignore}.
+
+\item If a mapping has been set with the \argref{map-format}
+switch that mapping will be checked.
+\item Otherwise the duplicate record will be discarded with a
+warning.
+\end{itemize}
+
+The \field{location} field is used to store the formatted location
+list. The code for this list is generated by \bibgls\ based on the
+information provided in the \ext{aux} file, the presence of the
+\field{see} or \field{seealso} field and the various settings described in this
+chapter. When you display the glossary using \cs{printunsrtglossary},
+if the \field{location} field is present it will be displayed
+according to the glossary style (and other factors, such as whether the
+\styopt{nonumberlist} option has been used, either as a package
+option or supplied in the optional argument of \cs{printunsrtglossary}).
+For more information on adjusting the formatting see the
+\sty{glossaries} and \sty{glossaries-extra} user manuals.
+
+\subsection{\csoptnv{save-locations}\csopteqval{boolean}}
+\labelopt{save-locations}
+
+By default, the locations will be processed and stored in the
+\field{location} and \field{loclist} fields. However, if you don't
+want the location lists (for example, you are using the
+\styopt{nonumberlist} option or you are using \app{xindy} with a
+custom location rule), then there's no need for \bibgls\ to process
+the locations. To switch this function off, just use
+\csopt[false]{save-locations}. Note that with this setting, if
+you're not additionally using \app{makeindex} or \app{xindy}, then
+the locations won't be available even if you don't have the
+\styopt{nonumberlist} option set.
+
+\subsection{\csoptnv{min-loc-range}\csopteqval{value}}
+\labelopt{min-loc-range}
+
+By default, three or more consecutive locations \meta{loc-1},
+\meta{loc-2}, \ldots, \meta{loc-n} are compressed into
+the range \texttt{\meta{loc-1}\cs{delimR} \meta{loc-n}} (where
+\cs{delimR} is provided by the \sty{glossaries} package). Otherwise
+the locations are separated by \cs{delimN} (again provided by
+\sty{glossaries}). As mentioned above, these aren't merged with
+explicit range formations.
+
+You can change this with the \csopt{min-loc-range} setting where
+\meta{value} is either \optfmt{none} (don't form ranges) or an
+integer greater than one indicating how many consecutive locations should be
+converted into a range.
+
+\bibgls\ determines if one location
+\margm{prefix-2}\margm{counter-2}\margm{format-2}\margm{location-2}
+is one unit more than another location
+\margm{prefix-1}\margm{counter-1}\margm{format-1}\margm{location-1}
+according to the following:
+\begin{enumerate}
+\item\label{itm:pre} If \meta{prefix-1} is not equal to \meta{prefix-2} or
+\meta{counter-1} is not equal to \meta{counter-2} or \meta{format-1}
+is not equal to \meta{format-2}, then the locations aren't
+considered consecutive.
+\item\label{itm:emptyloc} If either \meta{location-1} or \meta{location-2} are empty,
+then the locations aren't considered consecutive.
+\item\label{itm.csmatch} If both \meta{location-1} and \meta{location-2} match the
+pattern (line break for clarity only)\footnote{The Java class \texttt{\csfmt{p}\marg{javaDigit}}
+used in the regular expression will not only match the Western
+Arabic digits 0,\ldots, 9 but also digits in other scripts.
+Similarly the alphabetic classes will match alphabetic characters
+outside the Basic Latin set.}
+\begin{verbatim}
+(.*?)(?:\\protect\s*)?(\\[\p{javaAlphabetic}@]+)\s*\{([\p{javaDigit}
+\p{javaAlphabetic}]+)\}
+\end{verbatim}
+then:
+ \begin{itemize}
+ \item if the control sequence matched by group 2 isn't the same for
+ both locations, the locations aren't considered consecutive;
+ \item if the argument of the control sequence (group 3) is the same for
+ both locations, then the test is retried with \meta{location-1}
+set to group 1 of the first pattern match and \meta{location-2}
+set to group 1 of the second pattern match;
+ \item otherwise the test is retried with \meta{location-1} set to
+group 3 of the first pattern match and \meta{location-2} set to
+group 3 of the second pattern match.
+ \end{itemize}
+\item\label{itm:decmatch} If both \meta{location-1} and \meta{location-2} match the
+pattern
+\begin{verbatim}
+(.*?)([^\p{javaDigit}]?)(\p{javaDigit}+)
+\end{verbatim}
+then:
+ \begin{enumerate}
+ \item\label{itm:decgrp3eq} if group 3 of both pattern matches are
+equal then:
+ \begin{enumerate}
+ \item\label{itm:decgrp3nz} if group 3 isn't zero, the locations
+aren't considered consecutive;
+ \item if the separators (group 2) are different the test is
+retried with \meta{location-1} set to the concatenation of the first
+two groups \meta{group-1}\meta{group-2} of the first pattern match
+and \meta{location-2} set to the concatenation of the first two groups
+\meta{group-1}\meta{group-2} of the second pattern
+match;
+ \item\label{itm:decgrp3eqsepeq} if the separators (group 2) are the same the test is
+retried with \meta{location-1} set to the first
+group \meta{group-1} of the first pattern match
+and \meta{location-2} set to the first group
+\meta{group-1} of the second pattern match.
+ \end{enumerate}
+ \item If \meta{group-1} of the first pattern match (of
+\meta{location-1}) doesn't equal
+\meta{group-1} of the second pattern match (of \meta{location-2})
+or \meta{group-2} of the first pattern match (of
+\meta{location-1}) doesn't equal
+\meta{group-2} of the second pattern match (of \meta{location-2})
+then the locations aren't considered consecutive;
+ \item\label{itm:decgrp3} If $0 < l_2 - l_1 \leq d $
+where $l_2$ is \meta{group 3} of the second pattern match,
+$l_1$ is \meta{group 3} of the first pattern match and
+$d$ is the value of \optfmt{max-loc-diff} then the locations
+are consecutive otherwise they're not consecutive.
+ \end{enumerate}
+\item\label{itm:rommatch} The next pattern matches for \meta{prefix}\meta{sep}\meta{n}
+where \meta{n} is a lower case Roman numeral, which is converted to
+a decimal value and the test is performed in the same way as the
+above \hyperref[itm:decmatch]{decimal test}.
+\item\label{itm:Rommatch} The next pattern matches for \meta{prefix}\meta{sep}\meta{n}
+where \meta{n} is an upper case Roman numeral, which is converted to
+a decimal value and the test is performed
+in the same way as the above \hyperref[itm:decmatch]{decimal test}.
+\item\label{itm:alphmatch} The next pattern matches for \meta{prefix}\meta{sep}\meta{c}
+where \meta{c} is either a lower case letter from \texttt{a} to
+\texttt{z} or an upper case letter from \texttt{A} to \texttt{Z}.
+The character is converted to its code point and the test is
+performed in the same way as the \hyperref[itm:decmatch]{decimal pattern} above.
+\item\label{itm:nomatch} If none of the above, the locations aren't considered
+consecutive.
+\end{enumerate}
+
+Examples:
+\begin{enumerate}
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{1}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{2}
+\end{verbatim}
+These records are consecutive. The prefix, counter and format are
+identical (so the test passes step~\ref{itm:pre}), the locations match
+the \hyperref[itm:decmatch]{decimal pattern} and the test in
+step~\ref{itm:decgrp3} passes.
+
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{1}
+\glsxtr@record{gls.sample}{}{page}{textbf}{2}
+\end{verbatim}
+These records aren't consecutive since the formats are different.
+
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{A.i}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{A.ii}
+\end{verbatim}
+These records are consecutive. The prefix, counter and format are
+identical (so it passes step~\ref{itm:pre}). The locations match
+the \hyperref[itm:rommatch]{lower case Roman numeral pattern}, where
+\texttt{A} is considered a prefix and the dot is consider a
+separator. The Roman numerals i and ii are converted to decimal and
+the test is retried with the locations set to 1 and 2, respectively.
+This now passes the decimal pattern test (step~\ref{itm:decgrp3}).
+
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{i.A}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{ii.A}
+\end{verbatim}
+These records aren't consecutive. They match the
+\hyperref[itm:alphmatch]{alpha pattern}. The first location is
+considered to consist of the prefix \texttt{i}, the separator
+\texttt{.} (dot) and the number given by the character code of A.
+The second location is considered to consist of the prefix
+\texttt{ii}, the separator \texttt{.} (dot) and the number
+given by the character code of A.
+
+The test fails because the numbers are equal and the prefixes are
+different.
+
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{1.0}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{2.0}
+\end{verbatim}
+These records are consecutive. They match the \hyperref[itm:decmatch]{decimal
+pattern}, and then step~\ref{itm:decgrp3eq} followed by
+step~\ref{itm:decgrp3eqsepeq}. The \texttt{.0} part is discarded and
+the test is retried with the first location set to 1 and the second
+location set to 2.
+
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{1.1}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{2.1}
+\end{verbatim}
+These records aren't consecutive as the test branches off into
+step~\ref{itm:decgrp3nz}.
+
+\item
+\begin{verbatim}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{\@alph{1}}
+\glsxtr@record{gls.sample}{}{page}{glsnumberformat}{\@alph{2}}
+\end{verbatim}
+These records are consecutive. The locations match the
+\hyperref[itm.csmatch]{control sequence pattern}. The control
+sequences are the same, so the test is retried with the first
+location set to 1 and the second location set to 2.
+(Note that \csref{glsxtrresourcefile} changes the category code of
+\texttt{@} to allow for internal commands in locations.)
+\end{enumerate}
+
+\subsection{\csoptnv{max-loc-diff}\csopteqval{value}}
+\labelopt{max-loc-diff}
+
+This setting is used to determine whether two locations are
+considered consecutive.
+The value must be an integer greater than or equal to 1.
+(The default is \optfmt{1}.)
+
+For two locations, \meta{location-1} and \meta{location-2},
+that have numeric values $n_1$ and $n_2$ (and identical prefix,
+counter and format), then the sequence \meta{location-1},
+\meta{location-2} is considered consecutive if
+\[
+0 < n_2 - n_1 \leq \text{\meta{max-loc-diff}}
+\]
+The default value of 1 means that \meta{location-2} immediately
+follows \meta{location-1} if $n_2 = n_1+1$.
+
+For example, if \meta{location-1} is \qt{B} and \meta{location-2}
+is \qt{C}, then $n_1 = 66$ and $n_2 = 67$. Since $n_2 = 67 = 66+1=
+n_1+1$ then \meta{location-2} immediately follows \meta{location-1}.
+
+This is used in the range formations within the location lists.
+So, for example, the list \qt{1, 2, 3, 5, 7, 8, 10, 11, 12, 58, 59,
+61} becomes
+\qt{1--3, 5, 7, 8, 10--12, 58, 59, 61}.
+
+The automatically indexing of commands like \cs{gls} means that
+the location lists can become long and ragged. You could
+deal with this by switching off the automatic indexing and
+only explicitly index pertinent use or you can adjust
+the value of \optfmt{max-loc-diff} so that a range can be formed even
+there are one or two gaps in it.
+By default, any location ranges that have skipped gaps in this
+manner will be followed by \csref{bibglspassim}. The default
+definition of this command is obtained from the resource file.
+For English, this is \verb*| passim| (space followed by \qt{passim}).
+
+So with the above set of locations, if \csopt[2]{max-loc-diff} then
+the list becomes \qt{1--12 passim, 58--61 passim} which now highlights that
+there are two blocks within the document related to that
+term.
+
+\subsection{\csoptnv{suffixF}\csopteqval{value}}
+\labelopt{suffixF}
+
+If set, a range consisting of two consecutive locations
+\meta{loc-1} and \meta{loc-2} will be
+displayed in the location list as \meta{loc-1}\meta{value}.
+
+Note that \csopt[\empty]{suffixF} sets the suffix to the
+empty string. To remove the suffix formation use
+\csopt[none]{suffixF}.
+
+The default is \csopt[none]{suffixF}.
+
+\subsection{\csoptnv{suffixFF}\csopteqval{value}}
+\labelopt{suffixFF}
+
+If set, a range consisting of three or more consecutive locations
+\meta{loc-1} and \meta{loc-2} will be
+displayed in the location list as \meta{loc-1}\meta{value}.
+
+Note that \csopt[\empty]{suffixFF} sets the suffix to the
+empty string. To remove the suffix formation use
+\csopt[none]{suffixFF}.
+
+The default is \csopt[none]{suffixFF}.
+
+\subsection{\csoptnv{see}\csopteqval{value}}
+\labelopt{see}
+
+If an entry has a \field{see} field, this can be placed before or
+after the location list, or completely omitted (but the value will
+still be available in the \field{see} field for use with
+\cs{glsxtrusesee}). This option may take the following values:
+\begin{itemize}
+\item \optfmt{omit}: omit the see reference from the location
+list.
+\item \optfmt{before}: place the see reference before the location
+list.
+\item \optfmt{after}: place the see reference after the location
+list (default).
+\end{itemize}
+The \meta{value} part is required.
+
+The separator between the location list and the cross-reference is
+provided by \csref{bibglsseesep}. This separator is omitted if the
+location list is empty. The cross-reference is written to the
+\field{location} field using \cs{glsxtrusesee}\margm{label}.
+
+\subsection{\csoptnv{seealso}\csopteqval{value}}
+\labelopt{seealso}
+
+This is like \optref{see} but governs the location of the cross-references
+provided by the \field{seealso} field. You need at least v1.16
+of \sty{glossaries-extra} for this option. The values are the
+same as for \optref{see} but the separator is given by
+\csref{bibglsseealsosep}. The cross-reference is written to the
+\field{location} field using \cs{glsxtruseseealso}\margm{label}.
+
+\subsection{\csoptnv{alias-loc}\csopteqval{value}}
+\labelopt{alias-loc}
+
+If an entry has an \field{alias} field, the location list
+may be retained or omitted or transferred to the target entry.
+The \meta{value} may be one of:
+\begin{itemize}
+\item\optfmt{keep}: keep the location list;
+\item\optfmt{transfer}: transfer the location list;
+\item\optfmt{omit}: omit the location list.
+\end{itemize}
+The default setting is \csopt[transfer]{alias-loc}.
+In all cases, the target entry will be added to the \field{see}
+field of the entry with the \field{alias} field, unless it
+already has a \field{see} field (in which case the \field{see} value
+is left unchanged).
+
+Note that with \csopt[transfer]{alias-loc}, both the aliased
+entry and the target entry must be in the same resource set.
+(That is, both entries have been selected by the same instance of
+\csref{glsxtrresourcefile}.) If you have \sty{glossaries-extra} version
+1.12, you may need to redefine \cs{glsxtrsetaliasnoindex} to do
+nothing if the location lists aren't showing correctly
+with aliased entries. (This was corrected in version 1.13.)
+
+\subsection{\csoptnv{loc-prefix}\csopteqval{value}}
+\labelopt{loc-prefix}
+
+The \csopt{loc-prefix} setting indicates that the location lists
+should begin with \csref{bibglslocprefix}\margm{n}. The \meta{value} may
+be one of the following:
+\begin{itemize}
+\item \optfmt{false}: don't insert \cs{bibglslocprefix}\margm{n} at the start
+of the location lists (default).
+\item \optfmt{\margm{prefix-1},\margm{prefix-2},\ldots,\margm{prefix-n}}:
+insert \cs{bibglslocprefix}\margm{n} (where \meta{n} is the number of
+locations in the list) at the start of each location list and the
+definition of \cs{bibglslocprefix} will be appended to the glossary
+preamble providing an \cs{ifcase} condition:
+\begin{alltt}
+\cs{providecommand}\marg{\cs{bibglslocprefix}}[1]\marg{\%
+ \cs{ifcase}\string#1
+ \csfmt{or} \meta{prefix-1}\csref{bibglspostlocprefix}
+ \csfmt{or} \meta{prefix-2}\csfmt{bibglspostlocprefix}
+ \ldots
+ \csfmt{else} \meta{prefix-n}\csfmt{bibglspostlocprefix}
+ \csfmt{fi}
+}
+\end{alltt}
+
+\item \optfmt{list}: equivalent to \csopt[\cs{pagelistname} ]{loc-prefix}.
+\item \optfmt{true}: equivalent to
+\csopt[\csref{bibglspagename},\csref{bibglspagesname}]{loc-prefix},
+where the definitions of \cs{bibglspagename} and
+\cs{bibglspagesname} are obtained from the \texttt{tag.page} and
+\texttt{tag.pages} entries in \bibgls's \langxml.
+This setting works best if the document's language matches the
+language file. However, you can redefine these commands within
+the document's language hooks or in the glossary preamble.
+\end{itemize}
+
+If \meta{value} is omitted, \optfmt{true} is assumed. Take care not
+to mix different values of \csopt{loc-prefix} for entries for the
+same \csopt{type} setting. It's okay to mix \csopt[false]{loc-prefix} with
+another value, but don't mix non-\optfmt{false} values.
+See the description of \csref{bibglslocprefix} for
+further details.
+
+For example:
+\begin{verbatim}
+\GlsXtrLoadResources[type=main,src={entries1},loc-prefix=false]
+\GlsXtrLoadResources[type=main,src={entries2},loc-prefix]
+\GlsXtrLoadResources[type=symbols,src={entries3},loc-prefix={p.,pp.}]
+\end{verbatim}
+This works since the conflicting \csopt[p.,pp.]{loc-prefix} and
+\csopt[true]{loc-prefix} are in different glossaries (assigned through the
+\optref{type} key). The entries fetched from \texttt{entries1.bib}
+won't have a location prefix. The entries fetched from
+\texttt{entries2.bib} will have the location prefix obtained from
+the language resource file. The entries fetched from
+\texttt{entries3.bib} will have the location prefix \qt{p.}\ or
+\qt{pp.} (Note that using the \csopt{type} option isn't the same as
+setting the \field{type} field for each entry in the \ext{bib}
+file.)
+
+If the \csopt{type} option isn't used:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries1},loc-prefix=false]
+\GlsXtrLoadResources[src={entries2},loc-prefix]
+\GlsXtrLoadResources[src={entries3},loc-prefix={p.,pp.}]
+\end{verbatim}
+then \csopt[true]{loc-prefix} takes precedence over
+\csopt[p.,pp.]{loc-prefix} (since it was used first). The entries fetched from
+\texttt{entries1.bib} still won't have a location prefix, but the entries
+fetched from both \texttt{entries2.bib} and \texttt{entries3.bib}
+have the location prefixes obtained from the language resource file.
+
+\subsection{\csoptnv{loc-suffix}\csopteqval{value}}
+\labelopt{loc-suffix}
+
+This is similar to \optref{loc-prefix} but there are some subtle
+differences. In this case \meta{value} may either be the keyword
+\optfmt{false} (in which case the location suffix is omitted)
+or a comma-separated list
+\optfmt{\meta{suffix-0}\dcomma\meta{suffix-1}\dcomma\ldots\dcomma\meta{suffix-n}}
+where \meta{suffix-0} is the suffix to use when the location list
+only has a cross-reference with no locations, \meta{suffix-1} is the suffix to use
+when the location list has one location (optionally with a
+cross-reference), and so on. The final \meta{suffix-n} in the list
+is the suffix when the location list has \meta{n} or more locations
+(optionally with a cross-reference).
+
+This option will append \csref{bibglslocsuffix}\margm{n} to location
+lists that either have a cross-reference or have at least one location.
+Unlike \cs{bibglslocprefix}, this command isn't used when the
+location list is completely empty. Also, unlike
+\cs{bibglslocprefix}, this suffix command doesn't have an equivalent
+to \cs{bibglspostlocprefix}.
+
+If \meta{value} omitted, \csopt[\cs{@}.]{loc-suffix} is assumed.
+The default is \csopt[false]{loc-suffix}.
+
+As with \optref{loc-prefix}, take care not to mix different values
+of \csopt{loc-suffix} for entries in the same glossary type.
+
+\subsection{\csoptnv{loc-counters}\csopteqval{list}}
+\labelopt{loc-counters}
+
+Commands like \cs{gls} allow you to select a different
+counter to use for the location for that specific instance
+(overriding the default counter for the entry's glossary type).
+This is done with the \glsopt{counter} option. For example,
+consider the following document:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[colorlinks]{hyperref}
+\usepackage[record,style=tree]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ src={entries}% data in entries.bib
+]
+
+\begin{document}
+
+\gls{pi}.
+
+\begin{equation}
+\gls[counter=equation]{pi}
+\end{equation}
+
+\begin{equation}
+\gls[counter=equation]{pi}
+\end{equation}
+
+\newpage
+
+\begin{equation}
+\gls[counter=equation]{pi}
+\end{equation}
+
+
+\newpage
+
+\gls{pi}.
+
+\newpage
+
+\gls{pi}.
+
+\newpage
+
+\gls{pi}.
+
+\newpage
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+This results in the location list \qt{1, 1--3, 3--5}. This
+looks a little odd and it may seem as though the range formation
+hasn't worked, but the locations are actually: page~1, equation~1,
+equation~2, equation~3, page~3, page~4 and page~5. Ranges can't
+be formed across different counters.
+
+The \csopt[\meta{list}]{loc-counters} option instructs \bibgls\
+to group the locations according to the counters given in
+the comma-separated \meta{list}. If a location has a counter
+that's not listed in \meta{list}, then the location is discarded.
+
+For example:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ loc-counters={equation,page},% group locations by counter
+ src={entries}% data in entries.bib
+]
+\end{verbatim}
+This will first list the locations for the \counter{equation}
+counter and then the locations for the \counter{page} counter.
+Each group of locations is encapsulated within the command
+\csref{bibglslocationgroup}\margm{n}\margm{counter}\margm{locations}.
+The groups are separated by \csref{bibglslocationgroupsep}
+(which defaults to \cs{delimN}).
+
+The \meta{list} value must be non-empty. Use
+\csopt[as-use]{loc-counters} to restore the default behaviour, where
+the locations are listed in the document order of use, or
+\csopt[false]{save-locations} to omit the location lists. Note that
+you can't form counter groups from
+\hyperref[sec:supplementalopts]{supplemental location lists}.
+
+\section{Supplemental Locations}
+\label{sec:supplementalopts}
+
+\emph{These options require at least version 1.14 of \sty{glossaries-extra}.}
+
+\subsection{\csoptnv{supplemental-locations}\csopteqval{basename}}
+\labelopt{supplemental-locations}
+
+The \sty{glossaries-extra} package (from v1.14) provides a way of
+manually adding locations in supplemental documents through the use
+of the \glsaddopt{thevalue} option in the optional argument of
+\cs{glsadd}. Setting values manually is inconvenient and can result
+in errors, so \bibgls\ provides a way of doing this automatically.
+Both the main document and the supplementary document need to use
+the \styopt{record} option. The entries provided in the \csopt{src}
+set must have the same labels as those used in the supplementary
+document. (The simplest way to achieve this is to ensure that both
+documents use the same \ext{bib} files and the same prefixes.)
+
+For example, suppose the file \filefmt{entries.bib} contains:
+\begin{verbatim}
+@entry{sample,
+ name={sample},
+ description="an example entry"
+}
+
+@abbreviation{html,
+ short="html",
+ long={hypertext markup language}
+}
+@abbreviation{ssi,
+ short="ssi",
+ long="server-side includes"
+}
+
+@index{goose,plural="geese"}
+\end{verbatim}
+Now suppose the supplementary document is contained in the file
+\filefmt{suppl.tex}:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[colorlinks]{hyperref}
+\usepackage[record,counter=section]{glossaries-extra}
+
+\GlsXtrLoadResources[src=entries]
+
+\renewcommand{\thesection}{S\arabic{section}}
+\renewcommand{\theHsection}{\thepart.\thesection}
+
+\begin{document}
+\part{Sample Part}
+\section{Sample Section}
+\gls{goose}. \gls{sample}.
+
+\part{Another Part}
+\section{Another Section}
+\gls{html}.
+\gls{ssi}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+This uses the \counter{section} counter for the locations and has a
+prefix (\verb|\thepart.|) for the section hyperlinks.
+
+Now let's suppose I have another document called \filefmt{main.tex}
+that uses the \texttt{sample} entry, but also needs to include the
+location (S1) from the supplementary document. The manual approached
+offered by \sty{glossaries-extra} is quite cumbersome and requires
+setting the \catattr{externallocation} attribute and using
+\cs{glsadd} with \glsaddopt[S1]{thevalue}, \glsaddopt[I.S1]{theHvalue}
+and \glsaddopt[glsxtrsupphypernumber]{format}.
+
+This can be simplified with \bibgls\ by using the
+\optfmt{supplemental-locations} option. The value should be the base
+name (without the extension) of the supplementary document
+(\optfmt{suppl} in the above example). For example:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[colorlinks]{hyperref}
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ supplemental-locations=suppl,% fetch records from suppl.aux
+ src=entries]
+
+\begin{document}
+\Gls{sample} document.
+
+\printunsrtglossaries
+
+\end{document}
+\end{verbatim}
+The location list for \texttt{sample} will now be \qt{1, S1} (page~1
+from the main document and S1 from the supplementary document). Note
+that the original location format from the supplementary document
+will be replaced by \optfmt{glsxtrsupphypernumber}, which will
+produce an external hyperlink if the main document loads the
+\sty{hyperref} package. (Note that not all PDF viewers can handle
+external hyperlinks, and some that can open the external PDF file may not
+recognise the destination within that file.)
+
+The supplementary locations lists are encapsulated within
+\cs{bibglssupplemental}.
+
+\subsection{\csoptnv{supplemental-selection}\csopteqval{value}}
+\labelopt{supplemental-selection}
+
+In the above example, only the \texttt{sample} entry is listed in
+the main document, even though the supplementary document also
+references the \texttt{goose}, \texttt{html} and \texttt{ssi}
+entries. By default, only those entries that are referenced in the
+main document will have supplementary locations added (if found in
+the supplementary document's \ext{aux} file). You can additionally
+include other entries that are referenced in the supplementary
+document but not in the main document using
+\optfmt{supplemental-selection}. The \meta{value} may be one of the
+following:
+\begin{itemize}
+\item \optfmt{all}: add all the entries in the supplementary
+document that have been defined in the \ext{bib} files listed in
+\optref{src} for this resource set in the main document.
+\item \optfmt{selected}: only add supplemental locations for entries
+that have already been selected by this resource set.
+\item \meta{label-1},\ldots,\meta{label-2}: in addition to all those
+entries that have already been selected by this resource set, also
+add the entries identified in the comma-separated list. If a label
+in this list doesn't have a record in the supplementary document's
+\ext{aux} file, it will be ignored.
+\end{itemize}
+Any records in the supplementary \ext{aux} file that aren't defined
+by the current resource set (through the \ext{bib} files listed in
+\optref{src}) will be ignored. Entry aliases aren't taken into
+account when including supplementary locations.
+
+For example:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[colorlinks]{hyperref}
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ supplemental-locations=suppl,
+ supplemental-selection={html,ssi},
+ src=entries]
+
+\begin{document}
+\Gls{sample} document.
+
+\printunsrtglossaries
+
+\end{document}
+\end{verbatim}
+This will additionally add the \texttt{html} and \texttt{ssi} entries
+even though they haven't been used in this document. The
+\texttt{goose} entry used in the supplementary document won't be
+included.
+
+If an entry has both a main location list and a supplementary
+location list (such as the \texttt{sample} entry above), the lists
+will be separated by \csref{bibglssupplementalsep}.
+
+\subsection{\csoptnv{supplemental-category}\csopteqval{value}}
+\labelopt{supplemental-category}
+
+The \optfmt{category} for entries containing supplemental location
+lists may be set using \optfmt{supplemental\dhyphen category}. If unset,
+\meta{value} defaults to the same as that given by the
+\optref{category} option. The \meta{value} may either be a known
+identifier (as per \optref{category}) or the category label. For example:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[colorlinks]{hyperref}
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[
+ supplemental-locations=suppl,
+ supplemental-selection={html,ssi},
+ supplemental-category={supplemental},
+ src=entries]
+
+\begin{document}
+\Gls{sample} document.
+
+\printunsrtglossaries
+
+\end{document}
+\end{verbatim}
+
+\section{Sorting}
+\label{sec:sortingopts}
+
+Entries are typically sorted (for example, alphabetically
+or in order of use), but the \sty{glossaries-extra} package
+is versatile enough to be used in wider contexts than simple
+terms, symbols or abbreviations. For example, entries could
+contain theorems or problems where the \field{name} supplies
+the title and the \field{description} provides a description
+of the theorem or problem. Another field might then contain
+the proof or solution. Therefore, somewhat unusually for
+an indexing application, \bibgls\ also provides the option
+to shuffle the entries instead of sorting them.
+
+\subsection{\csoptnv{sort}\csopteqval{value}}
+\labelopt{sort}
+
+The \csopt{sort} key indicates how entries should be sorted. The
+\meta{value} may be one of:
+\begin{itemize}
+
+\item \optfmt{none} (or \optfmt{unsrt}): don't sort the entries.
+(The entries will be in the order they were processed when parsing
+the data.)
+
+\item \optfmt{random}: shuffles rather than sorts the entries.
+This won't work if there are hierarchical entries, so it's best
+to use this option with \optref{flatten}. The seed for the
+random generator can be set using \optref{shuffle} (which
+also automatically sets \csopt[random]{sort} and \csopt{flatten}).
+
+\item \meta{lang tag}: sort according to the rules of the locale
+given by the \gls{IETF} language tag \meta{lang tag}. (Use with
+\optref{break-at} to determine whether or not to split at word
+boundaries.)
+
+\item \optfmt{locale}: equivalent to
+\csopt[\meta{lang tag}]{sort} where \meta{lang tag} is obtained
+from the operating system (or Java Runtime Environment).
+
+\item \optfmt{doc}: sort the entries according to the document
+language. This is equivalent to \optref[\meta{lang tag}]{sort}
+where \meta{lang tag} is the locale associated with the document
+language. In the case of a multi-lingual document, \meta{lang tag}
+is the locale of the last language resource file to be loaded through
+\sty{tracklang}'s interface. It's best to explicitly set the locale
+for multi-lingual documents to avoid confusion. If no languages have been tracked, this
+option is equivalent to \csopt[locale]{sort}.
+
+\item \optfmt{custom}: sort the entries according to the
+rule provided by \optref{sort-rule}.
+
+\item \optfmt{use}: sort in order of use. (This order is determined
+by the records written to the \ext{aux} file by the \styopt{record}
+package option.)
+
+\item \optfmt{letter-case}: case-sensitive letter (character code) sort.
+
+\item \optfmt{letter-case-reverse}: reverse case-sensitive letter (character code) sort.
+
+\item \optfmt{letter-nocase}: case-insensitive letter (character code) sort.
+Use \csopt[\meta{lang tag}]{sort} with \csopt[none]{break-at} to
+emulate \app{xindy}'s locale letter ordering.
+
+\item \optfmt{letter-nocase-reverse}: reverse case-insensitive letter (character code) sort.
+
+\item \optfmt{integer}: integer sort. This is for integer sort
+values. Any value that isn't an integer is treated as 0.
+
+\item \optfmt{integer-reverse}: as above but reverses the order.
+
+\item \optfmt{hex}: hexadecimal integer sort. This is for
+hexadecimal sort values. Any value that isn't a hexadecimal number
+is treated as 0.
+
+\item \optfmt{hex-reverse}: as above but reverses the order.
+
+\item \optfmt{octal}: octal integer sort. This is for
+octal sort values. Any value that isn't a octal number
+is treated as 0.
+
+\item \optfmt{octal-reverse}: as above but reverses the order.
+
+\item \optfmt{binary}: binary integer sort. This is for binary sort
+values. Any value that isn't a binary number is treated as 0.
+
+\item \optfmt{binary-reverse}: as above but reverses the order.
+
+\item \optfmt{float}: single-precision sort. This is for
+decimal sort values. Any value that isn't a decimal is treated as 0.0.
+
+\item \optfmt{float-reverse}: as above but reverses the order.
+
+\item \optfmt{double}: double-precision sort. This is for
+decimal sort values. Any value that isn't a decimal is treated as 0.0.
+
+\item \optfmt{float-reverse}: as above but reverses the order.
+
+\end{itemize}
+If the \meta{value} is omitted, \csopt[doc]{sort} is assumed. If the
+\csopt{sort} option isn't used then \csopt[locale]{sort} is assumed.
+
+Note that \csopt[locale]{sort} can provide more detail about the
+locale than \csopt[doc]{sort}, depending on how the document
+language has been specified.
+
+For example, with:
+\begin{verbatim}
+\documentclass{article}
+\usepackage[ngerman]{babel}
+\usepackage[record]{glossaries}
+\GlsXtrLoadResources[src={german-terms}]
+\end{verbatim}
+the language tag will be \texttt{de-1996}, which doesn't have an
+associated region. Whereas with
+\begin{verbatim}
+\documentclass[de-DE-1996]{article}
+\usepackage[ngerman]{babel}
+\usepackage[record]{glossaries}
+\GlsXtrLoadResources[src={german-terms}]
+\end{verbatim}
+the language tag will be \texttt{de-DE-1996} because \sty{tracklang}
+has picked up the locale from the document class options. This is
+only likely to cause a difference if a language has different
+sorting rules according to the region or if the language may be
+written in multiple scripts.
+
+A multilingual document will need to have the \csopt{sort} specified
+when loading the resource to ensure the correct language is chosen.
+For example:
+\begin{verbatim}
+\GlsXtrLoadResources[src={english-terms},sort={en-GB}]
+\GlsXtrLoadResources[src={german-terms},sort={de-DE-1996}]
+\end{verbatim}
+
+\subsection{\csoptnv{sort-rule}\csopteqval{value}}
+\labelopt{sort-rule}
+
+If the \optref[custom]{sort} option is used, the sort rule
+must be provided with \optfmt{sort-rule}. In this case
+the collation is performed using Java's
+\href{http://docs.oracle.com/javase/8/docs/api/java/text/RuleBasedCollator.html}{RuleBasedCollator}
+class. Remember that the options will be expanded as they
+are written to the \ext{aux} file, so be careful of
+any special characters that occur in the rule. You can
+use \cs{string}\cs{u}\meta{hex} (where \meta{hex} is a hexadecimal
+code) to represent a Unicode character. For example:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ sort={custom},
+ sort-rule={< a,A < b,B < c,C < ch,Ch,CH < d,D
+ < dd,Dd,DD < e,E < f,F < ff,Ff,FF
+ < g,G < ng,Ng,NG < h,H < ij,Ij,IJ
+ < i,I < j,J < k,K < l,L < ll,Ll,LL < m,M
+ < n,N < o,O < p,P < ph,Ph,PH < q,Q < r,R < rh,Rh,RH
+ < s,S < t,T < th,Th,TH < u,U < v,V < w,W < x,X < y,Y < z,Z
+ < \string\u00E6,\string\u00C6}
+]
+\end{verbatim}
+You can also use \cs{protect} instead of \cs{string}. This will
+cause a space to appear between \cs{u} and the hexadecimal
+value in the \ext{aux} file (if \meta{hex} starts with a decimal
+digit), but \bibgls\ will accept a single space between \cs{u} and
+\meta{hex} to allow for this. However it's safer to just use
+\cs{string} (in case \meta{hex} start with a letter).
+
+If \optref{sort} is not set to \optfmt{custom}, the
+\optfmt{sort-rule} setting will be ignored.
+
+\subsection{\csoptnv{break-at}\csopteqval{option}}
+\labelopt{break-at}
+
+The rule-based sort options (\csopt[\meta{lang tag}]{sort}
+and \csopt[custom]{sort}) typically list punctuation characters
+(such as space) before alphabetical characters. This means that
+the rule-based sort options are naturally in a letter order, similar
+to \app{xindy}'s \texttt{ord/letorder} module. This isn't the same
+as \csopt[letter-nocase]{sort} as the locale letter ordering is rule-based
+rather than according to the Unicode value.
+
+In order to replicate \app{makeindex} and \app{xindy}'s default word
+order, \bibgls\ splits up the sort value at word boundaries and
+inserts a marker (identified by \optref{break-marker}).
+
+For example, if the sort value is \qt{sea lion} then it's actually
+converted to \verb"sea|lion|" whereas \qt{sea} becomes \verb"sea|"
+and \qt{seal} becomes \verb"seal|". The default marker is \verb"|"
+which is commonly placed in collation rules before digits but
+after the ignored characters, such as spaces and hyphens.
+
+You can change where the break points are inserted with
+\csopt[\meta{option}]{break-at} where \meta{option} may be one of:
+\begin{itemize}
+\item \optfmt{word}: break at word boundaries (default).
+For example, the sort value \qt{Tom, Dick, and Harry} becomes
+\verb"Tom|Dick|and|Harry".
+\item \optfmt{character}: break after each character.
+\item \optfmt{sentence}: break after each sentence.
+\item \optfmt{none}: don't create break points. Use this option to
+emulate \app{makeindex} or \app{xindy}'s letter ordering.
+\end{itemize}
+
+This option is ignored when used with the non-locale \csopt{sort} options.
+Use the \argref{debug} switch to show the break points.
+(This will also show the collation rule.)
+
+\subsection{\csoptnv{break-marker}\csopteqval{marker}}
+\labelopt{break-marker}
+
+The break marker can be changed using
+\csopt[\meta{marker}]{break-marker}, where \meta{marker} is
+the character to use. For example, \csopt[-]{break-marker} will use a
+hyphen. The marker may be empty, which effectively strips the
+inter-word punctuation. For example, with
+\csopt[\empty]{break-marker}, \qt{Tom, Dick, and Harry} becomes
+\texttt{TomDickandHarry} and \qt{sea lion} simply becomes
+\texttt{sealion}. If \meta{marker} is omitted,
+\csopt[\empty]{break-marker} is assumed.
+
+\subsection{\csoptnv{sort-field}\csopteqval{field}}
+\labelopt{sort-field}
+
+The \csopt{sort-field} key indicates which field provides the sort
+value. The default is the \field{sort} field. For example
+\begin{verbatim}
+\GlsXtrLoadResources[
+ src={entries-terms},% data in entries-terms.bib
+ sort-label=category,% sort by 'category' field
+ sort=letter-case% case-sensitive letter sort
+]
+\end{verbatim}
+This sorts the entries according to the \field{category} field using
+a case-sensitive letter comparison.
+You may also use \csopt[id]{sort-field} to sort according to
+the label.
+
+If an entry is missing a value for \meta{field}, then the value of
+the fallback field will be used instead. For example, with the
+default \csopt[sort]{sort-field}, then for an entry defined with
+\atentry{entry}, if the \field{sort} field is missing the fallback
+field will be the \field{name} or the \field{parent} field if the
+\field{name} field is missing. If the entry is instead defined with
+\atentry{abbreviation} (or \atentry{acronym}) then if the
+\field{sort} field is missing, \bibgls\ will start with the same
+fallback as for \atentry{entry} but if neither the \field{name} or
+\field{parent} field is set, it will fallback on the \field{short}
+field.
+
+If no fallback field can be found, the entry's label will be used.
+
+\subsection{\csoptnv{shuffle}\csopteqval{seed}}
+\labelopt{shuffle}
+
+Automatically sets \csopt[random]{sort} and \csopt{flatten}.
+The value \meta{seed} may be omitted. If present, it should
+be an integer used as a seed for the random number generator.
+
+\subsection{\csoptnv{strength}\csopteqval{value}}
+\labelopt{strength}
+
+The collation strength used by \csopt[\meta{locale}]{sort} can be set
+to the following values: \optfmt{primary} (default),
+\optfmt{secondary}, \optfmt{tertiary} or \optfmt{identical}. These
+indicate the difference between two characters, but the exact
+assignment is locale dependent. See the documentation for Java's
+\href{http://docs.oracle.com/javase/8/docs/api/java/text/Collator.html}{\texttt{Collator}
+class} for further details.
+
+For example, suppose the file \filefmt{entries.bib} contained:
+\begin{verbatim}
+@index{resume}
+
+@index{RESUME}
+
+@index{resumee,
+ name={r\'esum\'e}}
+
+@index{rat}
+
+@index{rot}
+
+@index{aardvark}
+
+@index{zoo}
+\end{verbatim}
+and the document contained:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[record]{glossaries-extra}
+
+\GlsXtrLoadResources[sort={en},src={entries}]
+
+\begin{document}
+\gls{resumee}, \gls{resume}, \gls{RESUME},
+\gls{aardvark}, \gls{rat}, \gls{rot}, \gls{zoo}.
+
+\printunsrtglossaries
+\end{document}
+\end{verbatim}
+then this uses the default \csopt[primary]{strength}, so the entries
+are listed as aardvark, rat, r\'esum\'e, resume, RESUME, rot, zoo.
+
+If the strength is changed to \optfmt{secondary}:
+\begin{verbatim}
+\GlsXtrLoadResources[sort={en},src={entries},strength=secondary]
+\end{verbatim}
+then the entries are listed as aardvark, rat, resume, RESUME,
+r\'esum\'e, rot, zoo.
+
+If the strength is changed to \optfmt{tertiary} or
+\optfmt{identical}, there's no difference from
+\csopt[secondary]{strength} for this particular example.
+
+This option is ignored by non-locale sorts (such as letter or numeric).
+
+\subsection{\csoptnv{decomposition}\csopteqval{value}}
+\labelopt{decomposition}
+
+The collation decomposition used by \csopt[\meta{locale}]{sort} can be set
+to the following values: \optfmt{canonical} (default),
+\optfmt{full} or \optfmt{none}. This determines how Unicode composed
+characters are handled. The fastest mode is \optfmt{none} but is
+only appropriate for languages without accents. The slowest mode is
+\optfmt{full} but is the most complete for languages with non-ASCII
+characters. See the documentation for Java's
+\href{http://docs.oracle.com/javase/8/docs/api/java/text/Collator.html}{\texttt{Collator}
+class} for further details.
+This option is ignored by non-locale sorts (such as letter or numeric).
+
+\section{Dual Entries}
+
+\subsection{\csoptnv{dual-sort}\csopteqval{value}}
+\labelopt{dual-sort}
+
+This option indicates how to sort the dual entries. The primary
+entries are sorted with the normal entries according to
+\optref{sort}, and the dual entries are sorted according to
+\csopt{dual-sort} unless \csopt[combine]{dual-sort} in which case the dual
+entries will be combined with the primary entries and all the
+entries will sorted together according to the \optref{sort} option.
+
+If \meta{value} isn't set to \optfmt{combine} then the dual
+entries are sorted separately according to \meta{value} (as per
+\optref{sort}) and the dual entries will be appended at the end of
+the \ext{glstex} file. The field used by the comparator is given by
+\optref{dual-sort-field}.
+If \csopt[custom]{dual-sort}, then the dual entries according to the
+rule provided by \optref{dual-sort-rule}.
+
+
+For example:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ src={entries-dual},
+ sort={en},
+ dual-sort={de-CH-1996}
+]
+\end{verbatim}
+This will sort the primary entries according to \optfmt{en}
+(English) and the secondary entries according to \optfmt{de-CH-1996}
+(Swiss German new orthography) whereas:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ src={entries-dual},
+ sort={en-GB},
+ dual-sort={combine}
+]
+\end{verbatim}
+will combine the dual entries with the primary entries and sort them
+all according to the \optfmt{en-GB} locale (British English).
+
+If not set, \csopt{dual-sort} defaults to \optfmt{combine}. If
+\meta{value} is omitted, \optfmt{locale} is assumed.
+
+\subsection{\csoptnv{dual-sort-field}\csopteqval{value}}
+\labelopt{dual-sort-field}
+
+This option indicates the field to use when sorting dual entries
+(when they haven't been combined with the primary entries). The
+default value is the same as the \optref{sort-field} value.
+
+\subsection{\csoptnv{dual-sort-rule}\csopteqval{value}}
+\labelopt{dual-sort-rule}
+
+As \optref{sort-rule} but for \csopt[custom]{dual-sort}.
+
+\subsection{\csoptnv{dual-prefix}\csopteqval{value}}
+\labelopt{dual-prefix}
+
+This option indicates the prefix to use for the dual entries. The
+default value is \idprefix{dual} (including the terminating period).
+Any references to dual entries within the \ext{bib} file should use
+the prefix \idprefix{dual} which will be replaced by \meta{value}
+when the \ext{bib} file is parsed.
+
+\subsection{\csoptnv{dual-type}\csopteqval{value}}
+\labelopt{dual-type}
+
+This option sets the \field{type} field for all dual
+entries. (The primary entries obey the \optref{type} option.) This
+will override any value of \field{type} provided in the \ext{bib}
+file (or created through a mapping). The \meta{value} is required.
+
+The \meta{value} may be:
+\begin{itemize}
+\item \optfmt{same as entry}: sets the
+\field{type} to the entry type. For example, if the entry
+was defined with \atentryref{dualentry}, the \field{type} will be
+set to \optfmt{dualentry}.
+\item \optfmt{same as primary}: sets the \field{type} to the same
+as the corresponding primary entry's \field{type} (which may
+have been set with \optref{type}). If the primary entry doesn't
+have the \field{type} field set, the dual's \field{type} will
+remain unchanged.
+\item \meta{label}: sets the \field{type} field to \meta{label}.
+\end{itemize}
+
+Remember that the glossary with that label must have already
+been defined.
+
+For example:
+\begin{verbatim}
+\newglossary*{english}{English}
+\newglossary*{french}{French}
+
+\GlsXtrLoadResources[src={entries},sort={en},dual-sort={fr},
+ type=english,
+ dual-type=french]
+\end{verbatim}
+
+Alternatively:
+\begin{verbatim}
+\newglossary*{dictionary}{Dictionary}
+
+\GlsXtrLoadResources[src={entries},sort={en},dual-sort={fr},
+ type=dictionary,
+ dual-type={same as primary}]
+\end{verbatim}
+
+\subsection{\csoptnv{dual-category}\csopteqval{value}}
+\labelopt{dual-category}
+
+This option sets the \field{category} field for all dual
+entries. (The primary entries obey the \optref{category} option.) This
+will override any value of \field{category} provided in the \ext{bib}
+file (or created through a mapping). The \meta{value} may be empty.
+
+The \meta{value} may be:
+\begin{itemize}
+\item \optfmt{same as entry}: sets the
+\field{category} to the entry type. For example, if the entry
+was defined with \atentryref{dualentry}, the \field{category} will be
+set to \optfmt{dualentry}.
+\item \optfmt{same as primary}: sets the \field{category} to the same
+as the corresponding primary entry's \field{category} (which may
+have been set with \optref{category}). If the primary entry doesn't
+have the \field{category} field set, the dual's \field{category} will
+remain unchanged.
+\item \optfmt{same as type}: sets the \field{category} to the same
+as the value of the entry's \field{type} field (which may have been
+set with \optref{dual-type}). If the entry doesn't
+have the \field{type} field set, the \field{category} will
+remain unchanged.
+\item \meta{label}: sets the \field{category} field to \meta{label}.
+\end{itemize}
+
+\subsection{\csoptnv{dual-short-case-change}\csopteqval{value}}
+\labelopt{dual-short-case-change}
+
+As \optref{short-case-change} but applies to the \field{dualshort}
+field instead.
+
+\subsection{\csoptnv{dual-entry-map}=\marg{\margm{list1},\margm{list2}}}
+\labelopt{dual-entry-map}
+
+This setting governs the behaviour of \atentry{dualentry}
+definitions. The value consists of two comma-separated lists of
+equal length identifying the field mapping used to create the dual
+entry from the primary one. Note that the \field{alias} field
+can't be mapped.
+
+The default setting is:
+\begin{verbatim}
+dual-entry-map=
+{
+ {name,plural,description,descriptionplural},
+ {description,descriptionplural,name,plural}
+}
+\end{verbatim}
+The dual entry is created by copying the value of the field in the
+first list \meta{list1} to the field in the corresponding place in the second
+list \meta{list2}. Any additional fields are copied over to the same
+field.
+
+For example:
+\begin{verbatim}
+@dualentry{cat,
+ name={cat},
+ description={chat},
+ see={dog}
+}
+\end{verbatim}
+defines two entries. The primary entry is essentially like
+\begin{verbatim}
+@entry{cat,
+ name={cat},
+ plural={cat\glspluralsuffix },
+ description={chat},
+ descriptionplural={chat\glspluralsuffix },
+ see={dog}
+}
+\end{verbatim}
+and the dual entry is essentially like
+\begin{verbatim}
+@entry{dual.cat,
+ description={cat},
+ descriptionplural={cat\glspluralsuffix },
+ name={chat},
+ plural={chat\glspluralsuffix },
+ see={dog}
+}
+\end{verbatim}
+(except they're defined using \cs{bibglsnewdualentry} instead of
+\cs{bibglsnewentry}, and each is considered dependent on the other.)
+
+The \field{see} field isn't listed in \csopt{dual-entry-map} so its
+value is simply copied directly over to the \field{see} field in the
+dual entry. Note that the missing plural fields (\field{plural} and
+\field{descriptionplural}) have been filled in.
+
+In general \bibgls\ doesn't try to supply missing fields, but in the
+dual entry cases it needs to do this for the mapped fields. This is
+because the shuffled fields might have different default values from
+the \sty{glossaries-extra} package's point of view. For example,
+\cs{longnewglossaryentry} doesn't provide a default for
+\field{descriptionplural} if if hasn't been set.
+
+\subsection{\csoptnv{dual-abbrv-map}=\marg{\margm{list1},\margm{list2}}}
+\labelopt{dual-abbrv-map}
+
+This is like \csopt{dual-entry-map} but applies to
+\atentry{dualabbreviation} rather than \atentry{dualentry}.
+Note that the \field{alias} field can't be mapped. The
+default setting is:
+\begin{verbatim}
+dual-abbrv-map=
+{
+ {short,shortplural,long,longplural,dualshort,dualshortplural,
+ duallong,duallongplural},
+ {dualshort,dualshortplural,duallong,duallongplural,short,shortplural,
+ long,longplural}
+}
+\end{verbatim}
+
+This essentially flips the \field{short} field with the
+\field{dualshort} field and the \field{long} field with the
+\field{duallong} field. See \atentryref{dualabbreviation}
+for further details.
+
+\subsection{\csoptnv{dual-entryabbrv-map}=\marg{\margm{list1},\margm{list2}}}
+\labelopt{dual-entryabbrv-map}
+
+This is like \csopt{dual-entry-map} but applies to
+\atentry{dualentryabbreviation} rather than \atentry{dualentry}.
+Note that the \field{alias} field can't be mapped. The
+default setting is:
+\begin{verbatim}
+dual-entryabbrv-map=
+{
+ {long,short,shortplural},
+ {name,text,plural}
+}
+\end{verbatim}
+See \atentryref{dualentryabbreviation} for further details.
+
+
+\subsection{\csoptnv{dual-symbol-map}=\marg{\margm{list1},\margm{list2}}}
+\labelopt{dual-symbol-map}
+
+This is like \csopt{dual-entry-map} but applies to
+\atentry{dualsymbol} rather than \atentry{dualentry}.
+Note that the \field{alias} field can't be mapped. The
+default setting is:
+\begin{verbatim}
+dual-symbol-map=
+{
+ {name,plural,symbol,symbolplural},
+ {symbol,symbolplural,name,plural}
+}
+\end{verbatim}
+
+This essentially flips the \field{name} field with the
+\field{symbol} field.
+
+\subsection{\csoptnv{dual-entry-backlink}\csopteqval{boolean}}
+\labelopt{dual-entry-backlink}
+
+This is a boolean setting.
+When used with \atentry{dualentry}, if \meta{boolean} is
+\optfmt{true}, this will wrap the contents of first mapped field
+with \cs{glshyperlink}. If \meta{boolean} is missing \optfmt{true}
+is assumed.
+
+The field is obtained from the first mapping
+listed in \csopt{dual-entry-map}.
+
+For example, if the document contains:
+\begin{verbatim}
+\GlsXtrLoadResource[dual-entry-backlink,
+dual-entry-map={
+ {name,plural,description,descriptionplural},
+ {description,descriptionplural,name,plural}
+},
+src={entries-dual}]
+\end{verbatim}
+and if the \ext{bib} file contains
+\begin{verbatim}
+@dualentry{child,
+ name={child},
+ plural={children},
+ description={enfant}
+}
+\end{verbatim}
+Then the definition of the primary entry (\texttt{child}) in the
+\ext{glstex} file will have the \field{description} field set to
+\begin{verbatim}
+{\glshyperlink[enfant]{dual.child}}
+\end{verbatim}
+and the dual entry (\texttt{dual.child}) will have the
+\field{description} field set to
+\begin{verbatim}
+{\glshyperlink[child]{child}}
+\end{verbatim}
+
+The reason the \field{description} field is chosen for the modification is
+because the first field listed in the first list in \csopt{dual-entry-map}
+is the \field{name} field which maps to \field{description} (the
+first field in the second list). This means that the hyperlink for
+the dual entry should be put in the \field{description} field.
+
+For the primary entry, the \field{name} field is looked up in the
+second list from the \csopt{dual-entry-map} setting. This is the
+third item in this second list, so the third item in the first list
+is selected, which also happens to be the \field{description} field,
+so the hyperlink for the primary entry is put in the
+\field{description} field.
+
+\subsection{\csoptnv{dual-abbrv-backlink}\csopteqval{boolean}}
+\labelopt{dual-abbrv-backlink}
+
+This is analogous to \csopt{dual-entry-backlink} but for entries
+defined with \atentry{dualabbreviation} instead of
+\atentry{dualentry}.
+
+\subsection{\csoptnv{dual-symbol-backlink}\csopteqval{boolean}}
+\labelopt{dual-symbol-backlink}
+
+This is analogous to \csopt{dual-entry-backlink} but for entries
+defined with \atentry{dualsymbol} instead of \atentry{dualentry}.
+
+\subsection{\csoptnv{dual-entryabbrv-backlink}\csopteqval{boolean}}
+\labelopt{dual-entryabbrv-backlink}
+
+This is analogous to \csopt{dual-entry-backlink} but for entries
+defined with \atentry{dualentryabbreviation} instead of
+\atentry{dualentry}.
+
+\subsection{\csoptnv{dual-backlink}\csopteqval{boolean}}
+\labelopt{dual-backlink}
+
+Shortcut for \csopt[\meta{boolean}]{dual-entry-backlink},
+\csopt[\meta{boolean}]{dual-entryabbrv-backlink},
+\csopt[\meta{boolean}]{dual-abbrv-backlink}, and
+\csopt[\meta{boolean}]{dual-symbol-backlink}.
+
+\subsection{\csoptnv{dual-field}\csopteqval{value}}
+\labelopt{dual-field}
+
+If this option is used, this will add \cs{glsxtrprovidestoragekey}
+to the start of the \ext{glstex} file providing the key given by
+\meta{value}. Any entries defined using \atentry{dualentry}
+will be written to the \ext{glstex} file with an extra field called
+\meta{value} that is set to the mirror entry. If \meta{value} is
+omitted \texttt{dual} is assumed.
+
+For example, if the \ext{bib} file contains
+\begin{verbatim}
+@dualentry{child,
+ name={child},
+ plural={children},
+ description={enfant}
+}
+\end{verbatim}
+Then with \csopt[dualid]{dual-field} this will first add the line
+\begin{verbatim}
+\glsxtrprovidestoragekey{dualid}{}{}
+\end{verbatim}
+at the start of the file and will include the line
+\begin{verbatim}
+dualid={dual.child},
+\end{verbatim}
+for the primary entry (\texttt{child}) and the line
+\begin{verbatim}
+dualid={child},
+\end{verbatim}
+for the dual entry (\texttt{dual.child}). It's then possible to
+reference one entry from the other. For example, the post-description
+hook could contain:
+\begin{verbatim}
+ \ifglshasfield{dualid}{\glscurrententrylabel}
+ {%
+ \space
+ (\glshyperlink{\glsxtrusefield{\glscurrententrylabel}{dualid}})%
+ }%
+ {}%
+\end{verbatim}
+Note that this new field won't be available for use within the
+\ext{bib} file (unless it was previously defined in the document
+before \csref{glsxtrresourcefile}).
+
+\chapter{Provided Commands}
+\label{sec:bibglscs}
+
+When \bibgls\ creates the \ext{glstex} file, it writes some
+definitions for custom commands in the form \csfmt{bibgls...} which
+may be changed as required. The command definitions all use
+\cs{providecommand} which means that you can define the command with
+\cs{newcommand} before the resource file is loaded.
+
+\section{Entry Definitions}
+\label{sec:newentrydefs}
+
+This section lists the commands (\csfmt{bibglsnew...}) used to
+define entries. Note that the entry definition commands are
+actually used when \TeX\ inputs the resource file, so redefining
+them after the resource file is loaded won't have an effect on the
+entries defined in that resource file (but will affect entries defined
+in subsequent resource files). Each provided command is defined in
+the \ext{glstex} file immediately before the first entry that
+requires it, so only the commands that are actually needed are
+provided.
+
+After each entry is defined, if it has any associated locations, the
+locations are added using
+\begin{alltt}
+\cs{glsxtrfieldlistadd}\margm{label}\marg{loclist}\margm{record}
+\end{alltt}
+This command is provided by \sty{glossaries-extra} (v1.12).
+
+
+\subsection{\csfmt{bibglsnewentry}}
+\labelcs{bibglsnewentry}
+
+\begin{definition}
+\cs{bibglsnewentry}\margm{label}\margm{options}\margm{name}\margm{description}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{entry} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewentry}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},#2}{#4}%
+}
+\end{verbatim}
+This uses the starred form of \cs{longnewglossaryentry} that
+doesn't automatically append \cs{nopostdesc} (which interferes with
+the post-description hooks provided by category attributes).
+
+\subsection{\csfmt{bibglsnewsymbol}}
+\labelcs{bibglsnewsymbol}
+
+\begin{definition}
+\cs{bibglsnewsymbol}\margm{label}\margm{options}\margm{name}\margm{description}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{symbol} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewsymbol}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},sort={#1},category={symbol},#2}{#4}%
+}
+\end{verbatim}
+Note that this sets the \field{sort} field to the label, but this
+may be overridden by the \meta{options} if the \field{sort} field
+was supplied or if \bibgls\ has determined the value whilst sorting
+the entries.
+
+This also sets the \field{category} to \optfmt{symbol}, but again this may
+be overridden by \meta{options} if the entry had the \field{category}
+field set in the \ext{bib} file or if the \field{category} was
+overridden with \optref[\meta{value}]{category}.
+
+\subsection{\csfmt{bibglsnewnumber}}
+\labelcs{bibglsnewnumber}
+
+\begin{definition}
+\cs{bibglsnewnumber}\margm{label}\margm{options}\margm{name}\margm{description}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{number} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewnumber}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},sort={#1},category={number},#2}{#4}%
+}
+\end{verbatim}
+This is much the same as \cs{bibglsnewsymbol} above but sets the
+\field{category} to \optfmt{number}. Again the \field{sort} and
+\field{category} keys may be overridden by \meta{options}.
+
+\subsection{\csfmt{bibglsnewindex}}
+\labelcs{bibglsnewindex}
+
+\begin{definition}
+\cs{bibglsnewindex}\margm{label}\margm{options}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{index} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand*{\bibglsnewindex}[2]{%
+ \newglossaryentry{#1}{name={#1},description={},#2}%
+}
+\end{verbatim}
+This makes the \field{name} default to the \meta{label} and sets
+an empty \field{description}. These settings may be overridden by
+\meta{options}. Note that the \field{description} doesn't include
+\cs{nopostdesc} to allow for the post-description hook used by
+category attributes.
+
+\subsection{\csfmt{bibglsnewabbreviation}}
+\labelcs{bibglsnewabbreviation}
+
+\begin{definition}
+\cs{bibglsnewabbreviation}\margm{label}\margm{options}\margm{short}\margm{long}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{abbreviation} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewabbreviation}[4]{%
+ \newabbreviation[#2]{#1}{#3}{#4}%
+}
+\end{verbatim}
+Since this uses \cs{newabbreviation}, it obeys the current
+abbreviation style for its given \field{category} (which may have
+been set in \meta{options}, either from the \field{category} field
+in the \ext{bib} file or through the \optref{category} option).
+Similarly the \field{type} will obey \cs{glsxtrabbrvtype} unless
+the value is supplied in the \ext{bib} file or through the
+\optref{type} option.
+
+\subsection{\csfmt{bibglsnewacronym}}
+\labelcs{bibglsnewacronym}
+
+\begin{definition}
+\cs{bibglsnewacronym}\margm{label}\margm{options}\margm{short}\margm{long}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{acronym} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewacronym}[4]{%
+ \newacronym[#2]{#1}{#3}{#4}%
+}
+\end{verbatim}
+This works in much the same way as \cs{bibglsnewabbreviation}.
+Remember that with the \sty{glossaries-extra} package \cs{newacronym}
+is redefined to just use \cs{newabbreviation} with the default \field{type}
+set to \cs{acronymtype} and the default \field{category} set to
+\cs{acronym}.
+
+\subsection{\csfmt{bibglsnewdualentry}}
+\labelcs{bibglsnewdualentry}
+
+\begin{definition}
+\cs{bibglsnewdualentry}\margm{label}\margm{options}\margm{name}\margm{description}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{dualentry} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualentry}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},#2}{#4}%
+}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsnewdualentryabbreviation}}
+\labelcs{bibglsnewdualentryabbreviation}
+
+\begin{definition}
+\cs{bibglsnewdualentryabbreviation}\margm{label}\margm{options}\margm{short}\margm{long}\margm{description}
+\end{definition}
+This command is used to define primary terms identified with the
+\atentryref{dualentryabbreviation} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualentryabbreviation}[5]{%
+ \newabbreviation[#2]{#1}{#3}{#4}%
+}
+\end{verbatim}
+Note that this definition ignores the \meta{description} argument.
+
+\subsection{\csfmt{bibglsnewdualentryabbreviationsecondary}}
+\labelcs{bibglsnewdualentryabbreviationsecondary}
+
+\begin{definition}
+\cs{bibglsnewdualentryabbreviationsecondary}\margm{label}\margm{options}\margm{short}\margm{long}\margm{description}
+\end{definition}
+This command is used to define secondary terms identified with the
+\atentryref{dualentryabbreviation} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualentryabbreviationsecondary}[5]{%
+ \longnewglossaryentry*{#1}{#2}{#5}%
+}
+\end{verbatim}
+Note that this definition ignores the \meta{short} and \meta{long}
+arguments (which will typically be empty unless the default mappings
+are changed).
+
+\subsection{\csfmt{bibglsnewdualsymbol}}
+\labelcs{bibglsnewdualsymbol}
+
+\begin{definition}
+\cs{bibglsnewdualsymbol}\margm{label}\margm{options}\margm{name}\margm{description}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{dualsymbol} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualsymbol}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},sort={#1},category={symbol},#2}{#4}}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsnewdualnumber}}
+\labelcs{bibglsnewdualnumber}
+
+\begin{definition}
+\cs{bibglsnewdualnumber}\margm{label}\margm{options}\margm{name}\margm{description}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{dualnumber} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualnumber}[4]{%
+ \longnewglossaryentry*{#1}{name={#3},sort={#1},category={symbol},#2}{#4}}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsnewdualabbreviation}}
+\labelcs{bibglsnewdualabbreviation}
+
+\begin{definition}
+\cs{bibglsnewdualabbreviation}\margm{label}\margm{options}\margm{short}\margm{long}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{dualabbreviation} type where the \field{duallong} field
+is swapped with the \field{long} field and the \field{dualshort}
+field is swapped with the \field{short} field. The definition provided in the
+\ext{glstex} file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualabbreviation}[4]{%
+ \newabbreviation[#2]{#1}{#3}{#4}%
+}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsnewdualacronym}}
+\labelcs{bibglsnewdualacronym}
+
+\begin{definition}
+\cs{bibglsnewdualacronym}\margm{label}\margm{options}\margm{short}\margm{long}
+\end{definition}
+This command is used to define terms identified with the
+\atentryref{dualacronym} type. The definition provided in the \ext{glstex}
+file is:
+\begin{verbatim}
+\providecommand{\bibglsnewdualacronym}[4]{%
+ \newacronym[#2]{#1}{#3}{#4}%
+}
+\end{verbatim}
+This works in much the same way as \cs{bibglsnewdualabbreviation}.
+Remember that with the \sty{glossaries-extra} package \cs{newacronym}
+is redefined to just use \cs{newabbreviation} with the default \field{type}
+set to \cs{acronymtype} and the default \field{category} set to
+\cs{acronym}.
+
+\section{Location Lists and Cross-References}
+\label{sec:loclistdefs}
+
+These commands deal with the way the location lists and cross
+references are formatted. The commands typically aren't used until
+the entry information is displayed in the glossary, so you may
+redefine these commands after the resource file has been loaded.
+
+\subsection{\csfmt{bibglsseesep}}
+\labelcs{bibglsseesep}
+
+\begin{definition}
+\cs{bibglsseesep}
+\end{definition}
+
+Any entries that provide a \field{see} field (and that field hasn't
+be omitted from the location list with \csopt[omit]{see}) will
+have \cs{bibglsseesep} inserted between the \field{see} part and the
+location list (unless there are no locations, in which case just
+the \field{see} part is displayed without \cs{bibglsseesep}).
+
+This command is provided with:
+\begin{verbatim}
+\providecommand{\bibglsseesep}{, }
+\end{verbatim}
+You can define this before you load the \ext{bib} file:
+\begin{verbatim}
+\newcommand{\bibglsseesep}{; }
+\GlsXtrLoadResources[src={entries}]
+\end{verbatim}
+Or you can redefine it afterwards:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries}]
+\renewcommand{\bibglsseesep}{; }
+\end{verbatim}
+
+\subsection{\csfmt{bibglsseealsosep}}
+\labelcs{bibglsseealsosep}
+
+\begin{definition}
+\cs{bibglsseealsosep}
+\end{definition}
+
+This is like \cs{bibglsseesep} but is used with cross-reference
+lists provided with the \field{seealso} field, if supported.
+
+\subsection{\csfmt{bibglspassim}}
+\labelcs{bibglspassim}
+
+\begin{definition}
+\cs{bibglspassim}
+\end{definition}
+
+If \optref{max-loc-diff} is greater than 1, then any ranges that have
+skipped over gaps will be followed by \cs{bibglspassim}, which is
+defined as:
+\begin{verbatim}
+\providecommand{\bibglspassim}{ \bibglspassimname}
+\end{verbatim}
+You can define this before you load the \ext{bib} file:
+\begin{verbatim}
+\newcommand{\bibglspassim}{}
+\GlsXtrLoadResources[src={entries}]
+\end{verbatim}
+Or you can redefine it afterwards:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries}]
+\renewcommand{\bibglspassim}{}
+\end{verbatim}
+
+\subsection{\csfmt{bibglspassimname}}
+\labelcs{bibglspassimname}
+
+\begin{definition}
+\cs{bibglspassimname}
+\end{definition}
+
+The default definition is obtained from the \langxml. For example, with \file{bib2gls-en.xml} the provided
+definition is
+\begin{verbatim}
+\providecommand{\bibglspassimname}{passim}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsrange}}
+\labelcs{bibglsrange}
+
+\begin{definition}
+\cs{bibglsrange}\marg{\meta{start}\cs{delimR} \meta{end}}
+\end{definition}
+
+Explicit ranges formed using \glsopt[(]{format} and
+\glsopt[)]{format} or \glsopt[(\meta{csname}]{format} and
+\glsopt[)\meta{csname}]{format} (where \meta{csname} matches and is a
+text-block command without the initial backslash) in the optional
+argument of commands like \cs{gls} or \cs{glsadd} are encapsulated within
+the argument of \cs{bibglsrange}. By default this simply does its
+argument. This command is not used with ranges that are formed by collating
+consecutive locations.
+
+\subsection{\csfmt{bibglsinterloper}}
+\labelcs{bibglsinterloper}
+
+\begin{definition}
+\cs{bibglsinterloper}\margm{location}
+\end{definition}
+
+If an explicit range conflicts with a record, a warning will be
+issued and the conflicting record will be shifted to the front
+of the range inside the argument of \cs{bibglsinterloper}.
+The default definition just does \meta{location}\cs{delimN}
+so that it fits neatly into the list.
+
+For example, suppose on page~4 of my document I start a range with
+\begin{verbatim}
+\glsadd[format={(}]{sample}
+\end{verbatim}
+and end it on page~9 with
+\begin{verbatim}
+\glsadd[format={)}]{sample}
+\end{verbatim}
+This forms an explicit range, but let's suppose on page~6 I
+have
+\begin{verbatim}
+\gls[format={hyperbf}]{sample}
+\end{verbatim}
+This record conflicts with the explicit range (which doesn't include
+\texttt{hyperbf} in the format). This causes a warning and
+the conflicting entry will be moved before the start of the
+explicit range resulting in \textbf{6}, 4--9.
+
+Note that implicit ranges can't be formed from interlopers (nor can
+implicit ranges be merged with explicit ones),
+so if \verb|\gls[format={hyperbf}]{sample}| also occurs
+on pages~7 and~8 then the result will be \textbf{6}, \textbf{7},
+\textbf{8}, 4--9. Either remove the explicit range or
+remove the conflicting entries. (Alternatively, redefine
+\cs{bibglsinterloper} to ignore its argument, which will
+discard the conflicting entries.)
+
+\subsection{\csfmt{bibglspostlocprefix}}
+\labelcs{bibglspostlocprefix}
+
+\begin{definition}
+\cs{bibglspostlocprefix}
+\end{definition}
+
+If the \optref{loc-prefix} option is on, \csref{bibglslocprefix} will
+be inserted at the start of location lists. The command \cs{bibglspostlocprefix}
+is placed after the prefix text. This command is provided with:
+\begin{verbatim}
+\providecommand{\bibglspostlocprefix}{\ }
+\end{verbatim}
+which puts a space between the prefix text and the location list.
+You can define this before you load the \ext{bib} file:
+\begin{verbatim}
+\newcommand{\bibglspostlocprefix}{: }
+\GlsXtrLoadResources[src={entries},loc-prefix]
+\end{verbatim}
+Or you can redefine it afterwards:
+\begin{verbatim}
+\GlsXtrLoadResources[src={entries},loc-prefix]
+\renewcommand{\bibglspostlocprefix}{: }
+\end{verbatim}
+
+\subsection{\csfmt{bibglslocprefix}}
+\labelcs{bibglslocprefix}
+
+\begin{definition}
+\cs{bibglslocprefix}\margm{n}
+\end{definition}
+
+If the \optref{loc-prefix} option is on, this command will be
+provided. If the glossary type has been provided by \optref{type}
+(and \optref{dual-type} if there are any dual entries) then the
+definition of \cs{bibglslocprefix} will be appended to the glossary
+preamble for the given type (or types if there are dual entries).
+For example, if the document has
+\begin{verbatim}
+\GlsXtrLoadResources[type=main,loc-prefix={p.,pp.},src={entries}]
+\end{verbatim}
+and there are no dual entries, then the following will be added to
+the \ext{glstex} file:
+\begin{verbatim}
+\apptoglossarypreamble[main]{%
+ \providecommand{\bibglslocprefix}[1]{%
+ \ifcase##1
+ \or p.\bibglspostlocprefix
+ \else pp.\bibglspostlocprefix
+ \fi
+ }%
+}
+\end{verbatim}
+However, if the \csopt{type} key is missing, then the following will
+be added instead:
+\begin{verbatim}
+\appto\glossarypreamble{%
+ \providecommand{\bibglslocprefix}[1]{%
+ \ifcase#1
+ \or p.\bibglspostlocprefix
+ \else pp.\bibglspostlocprefix
+ \fi
+ }%
+}
+\end{verbatim}
+
+\subsection{\csfmt{bibglspagename}}
+\labelcs{bibglspagename}
+
+\begin{definition}
+\cs{bibglspagename}
+\end{definition}
+
+If \csopt[true]{loc-prefix} is used, then this command is provided
+using the value of \texttt{tag.page} from the \langxml. For example with \file{bib2gls-en.xml} the definition is:
+\begin{verbatim}
+\providecommand{\bibglspagename}{Page}
+\end{verbatim}
+
+\subsection{\csfmt{bibglspagesname}}
+\labelcs{bibglspagesname}
+
+\begin{definition}
+\cs{bibglspagesname}
+\end{definition}
+
+If \csopt[true]{loc-prefix} is used, then this command is provided
+using the value of \texttt{tag.pages} from the \langxml. For example with \file{bib2gls-en.xml} the definition is:
+\begin{verbatim}
+\providecommand{\bibglspagesname}{Pages}
+\end{verbatim}
+
+\subsection{\csfmt{bibglslocsuffix}}
+\labelcs{bibglslocsuffix}
+
+\begin{definition}
+\cs{bibglslocsuffix}\margm{n}
+\end{definition}
+
+If the \optref{loc-suffix} option is on, this command will be
+provided. If the glossary type has been provided by \optref{type}
+(and \optref{dual-type} if there are any dual entries) then the
+definition of \cs{bibglslocsuffix} will be appended to the glossary
+preamble for the given type (or types if there are dual entries).
+
+This commands definition depends on the value provided by
+\optref{loc-suffix}. For example, with \csopt[\cs{@}.]{loc-suffix}
+the command is defined as:
+\begin{verbatim}
+\providecommand{\bibglslocsuffix}[1]{\@.}
+\end{verbatim}
+(which ignores the argument).
+
+Whereas with \csopt[\meta{A}\dcomma\meta{B}\dcomma\meta{C}]{loc-suffix}
+the command is defined as:
+\begin{verbatim}
+\providecommand{\bibglslocsuffix}[1]{\ifcase#1 A\or B\else C\fi}
+\end{verbatim}
+
+Note that this is slightly different from \cs{bibglslocprefix} as
+it includes the 0 case, which in this instance means that there were
+no locations but there was a cross-reference. This command isn't
+added when the location list is empty.
+
+\subsection{\csfmt{bibglslocationgroup}}
+\labelcs{bibglslocationgroup}
+
+\begin{definition}
+\cs{bibglslocationgroup}\margm{n}\margm{counter}\margm{list}
+\end{definition}
+
+When the \optref{loc-counters} option is used, the locations
+for each entry are grouped together according to the counter
+(in the order specified in the value of \optref{loc-counters}).
+Each group of locations is encapsulated within
+\cs{bibglslocationgroup}, where \meta{n} is the number
+of locations within the group, \meta{counter} is the
+counter name and \meta{list} is the formatted location sub-list.
+By default, this simply does \meta{list}, but may be
+defined (before the resources are loaded) or redefined
+(after the resources are loaded) as required.
+
+For example:
+\begin{verbatim}
+\newcommand*{\bibglslocationgroup}[3]{%
+ \ifnum#1=1
+ #2:
+ \else
+ #2s:
+ \fi
+ #3%
+}
+
+\GlsXtrLoadResources[
+ loc-counters={equation,page},% group locations by counter
+ src={entries}% data in entries.bib
+]
+\end{verbatim}
+This will prefix each group with the counter name, if there's
+only one location, or the counter name followed by \qt{s},
+if there are multiple locations within the group.
+
+There are various ways to adapt this to translate the counter
+name to a different textual label, such as:
+\begin{verbatim}
+\providecommand{\pagename}{Page}
+\providecommand{\pagesname}{Pages}
+\providecommand{\equationname}{Equation}
+\providecommand{\equationsname}{Equations}
+
+\newcommand*{\bibglslocationgroup}[3]{%
+ \ifnum#1=1
+ \ifcsdef{#2name}{\csuse{#2name}}{#2}:
+ \else
+ \ifcsdef{#2sname}{\csuse{#2sname}}{#2s}:
+ \fi
+ #3%
+}
+\end{verbatim}
+
+\subsection{\csfmt{bibglslocationgroupsep}}
+\labelcs{bibglslocationgroupsep}
+
+\begin{definition}
+\cs{bibglslocationgroupsep}
+\end{definition}
+
+When the \optref{loc-counters} option is set, this command
+is used to separate each location sub-group. It may be defined
+before the resources are loaded:
+\begin{verbatim}
+\newcommand*{\bibglslocationgroupsep}{; }
+
+\GlsXtrLoadResources[
+ loc-counters={equation,page},% group locations by counter
+ src={entries}% data in entries.bib
+]
+\end{verbatim}
+or redefined after the resources are loaded:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ loc-counters={equation,page},% group locations by counter
+ src={entries}% data in entries.bib
+]
+
+\renewcommand*{\bibglslocationgroupsep}{; }
+\end{verbatim}
+
+\subsection{\csfmt{bibglssupplemental}}
+\labelcs{bibglssupplemental}
+
+\begin{definition}
+\cs{bibglssupplemental}\margm{n}\margm{list}
+\end{definition}
+
+When the \optref{supplemental-locations} option is used, the locations
+from a supplementary document are encapsulated within the \meta{list}
+part of \cs{bibglssupplemental}. The first argument \meta{n}
+(ignored by default) is the number of supplementary locations.
+
+\subsection{\csfmt{bibglssupplementalsep}}
+\labelcs{bibglssupplementalsep}
+
+\begin{definition}
+\cs{bibglssupplementalsep}
+\end{definition}
+
+The separator between the main location list and the supplementary
+location list. By default this is just \cs{delimN}. This may be
+defined before the resources are loaded:
+\begin{verbatim}
+\newcommand{\bibglssupplementalsep}{; }
+
+\GlsXtrLoadResources[
+ supplemental-locations=supplDoc,
+ src={entries}]
+\end{verbatim}
+or redefined after the resources are loaded:
+\begin{verbatim}
+\GlsXtrLoadResources[
+ supplemental-locations=supplDoc,
+ src={entries}]
+
+\renewcommand{\bibglssupplementalsep}{; }
+\end{verbatim}
+
+\section{Letter Groups}
+\label{sec:lettergroupdefs}
+
+The commands listed in this section are provided for use with the
+\argref{group} switch and glossary styles that display the letter
+group title. If these need their definitions altered, they should
+be defined before the resource file is loaded (rather than redefined
+afterwards).
+
+The base \sty{glossaries} package determines group titles through a fairly
+simplistic rule. Both \app{makeindex} and \app{xindy} write the
+line
+\begin{alltt}
+\cs{glsgroupheading}\margm{heading}
+\end{alltt}
+to the associated glossary file at the start of each new letter group.
+For example, the \qt{A} letter group will be written as:
+\begin{verbatim}
+\glsgroupheading{A}
+\end{verbatim}
+This is quite straightforward and the heading title can just be
+\qt{A}. The \qt{Symbols} group is written as
+\begin{verbatim}
+\glsgroupheading{glssymbols}
+\end{verbatim}
+To allow for easy translation, the base \sty{glossaries} package has
+the simple rule:
+\begin{itemize}
+\item if \csfmt{\meta{heading}groupname} exists use that;
+\item otherwise just use \meta{heading}.
+\end{itemize}
+There's no \csfmt{Agroupname} provided, but \cs{glssymbolsgroupname}
+is provided and is supported by the associated language modules,
+such as \styfmt{glossaries-french}. (Similarly for the \qt{Numbers}
+group.)
+
+The glossary styles that provide hyperlinks to the groups (such as
+\glostyle{indexhypergroup}) use \meta{heading} to form the target
+name. A problem arises when active characters occur in
+\meta{heading}, which happens with extended characters and
+\sty{inputenc}.
+
+The \sty{glossaries-extra} package (as from version 1.14) provides
+\begin{definition}
+\cs{glsxtrsetgrouptitle}\margm{label}\margm{title}
+\end{definition}
+to set the title for a group with the given label. The internal
+workings of \cs{glsgroupheading} are modified to use a slightly
+altered rule:
+\begin{itemize}
+\item if a title has been set using
+\cs{glsxtrsetgrouptitle}\margm{heading}\margm{title} for the given
+\meta{heading}, use that;
+\item if \csfmt{\meta{heading}groupname} exists, use that;
+\item just use \meta{heading} for the title.
+\end{itemize}
+So if \cs{glsxtrsetgrouptitle} hasn't been used, it falls back on
+the original rule.
+
+The problem is now how to make the indexing application use the
+desired label in the argument of \cs{glsgroupheading} instead of selecting
+the heading based on the first character of each sort value for each
+top-level entry in that group. This can't be done with
+\app{makeindex}, and with \app{xindy} it requires a custom language
+module, which isn't a trivial task.
+
+With \bibgls, a different approach is used. The \ext{glstex} file
+created isn't comparable to the \ext{gls} file created by
+\app{makeindex} or \app{xindy}. There's nowhere for \bibgls\ to
+write the \cs{glsgroupheading} line as it isn't creating the code
+that typesets the glossary list. Instead it's creating the code that
+defines the entries. The actual group heading is inserted by
+\cs{printunsrtglossary} and it's only able to do this by checking if
+the entry has a \field{group} field and comparing it to the previous
+entry's \field{group} field.
+
+The collators used by the locale and letter-based rules save the
+following information for each entry based on the first significant letter of
+the \field{sort} field (if the letter is recognised as alphabetical,
+according to the rule):
+\begin{itemize}
+\item \meta{title} The group's title. This is typically title-cased.
+For example, if the rule recognises the digraph \qt{dz}, then the
+title is \qt{Dz}. Exceptions to this are included in the \langxml.
+If the key \texttt{grouptitle.case.\meta{lc}} exists, where
+\meta{lc} is the lower case version of \meta{title}, then the value
+of that key is used instead. For example, the Dutch digraph \qt{ij}
+should be converted to \qt{IJ}, so \file{bib2gls-en.xml} includes:
+\begin{verbatim}
+<entry key="grouptitle.case.ij">IJ</entry>
+\end{verbatim}
+(See the \argref{group} switch for more details.)
+\item \meta{letter} This is the actual letter at the start of the
+given entry's \field{sort} field, which may be lower case or may
+contain diacritics that don't appear in \meta{title}.
+\item \meta{id} A numeric identifier. This may be the collation key
+or the code point for the given letter, depending on the sort
+method.
+\item \meta{type} The entry's glossary type. If not known, this will
+be empty. (\bibgls\ won't know if you've modified the associated
+\csfmt{bibglsnew...} command to set the \field{type}. It can only
+know the type if it's in the original \ext{bib} definition or is set
+using resource options such as \optref{type}.)
+\end{itemize}
+
+The \field{group} field is then set using:
+\begin{alltt}
+group=\marg{\cs{bibglslettergroup}\margm{title}\margm{letter}\margm{id}\margm{type}}
+\end{alltt}
+This field needs to expand to a simple label, which \csref{bibglslettergroup}
+is designed to do. Note that non-letter groups are dealt with
+separately (see below).
+
+\subsection{\csfmt{bibglssetlettergrouptitle}}
+\labelcs{bibglssetlettergrouptitle}
+
+For each group that's detected, \bibgls\ will write the line:
+\begin{definition}
+\cs{bibglssetlettergrouptitle}\marg{\margm{title}\margm{letter}\margm{id}\margm{type}}
+\end{definition}
+in the \ext{glstex} file, which sets the group's title using
+\begin{alltt}
+\cs{glsxtrsetgrouptitle}\margm{group label}\margm{group title}
+\end{alltt}
+where the \meta{group label} part matches the corresponding \field{group}
+value.
+
+Note that \cs{bibglssetlettergrouptitle} only has a single
+argument, but that argument contains the four arguments needed by
+\csref{bibglslettergroup} and \csref{bibglslettergrouptitle}.
+These arguments are as described above.
+
+If \cs{glsxtrsetgrouptitle} has been defined (\sty{glossaries-extra}
+version 1.14 onwards), then \cs{bibglssetlettergrouptitle} will be
+defined as
+\begin{verbatim}
+\providecommand{\bibglssetlettergrouptitle}[1]{%
+ \glsxtrsetgrouptitle{\bibglslettergroup#1}{\bibglslettergrouptitle#1}}
+\end{verbatim}
+If an earlier version of \sty{glossaries-extra} is used, then this
+function can't be supported and the command will be defined to
+simply ignore its argument. This will fall back on the original
+method of just using \meta{title} as the label.
+
+Since \cs{bibglssetlettergrouptitle} is used in the \ext{glstex} file to
+set the group titles, the associated commands need to be defined
+before the resource file is loaded if their definitions require
+modification. After the resource file has been loaded, you can
+adjust the title of a specific group, but you'll need to check the
+\ext{glstex} file for the appropriate arguments. For example, if the
+\ext{glstex} file contains:
+\begin{alltt}
+\cs{bibglssetlettergrouptitle}\marg{\marg{\AE}\marg{\ae}\marg{7274496}\marg{}}
+\end{alltt}
+but you actually want the group title to appear as \qt{\AE\ (AE)}
+instead of just \qt{\AE}, then after the resource file has been
+loaded you can do:
+\begin{alltt}
+\cs{glsxtrsetgrouptitle}
+ \marg{\cs{bibglslettergroup}\marg{\AE}\marg{\ae}\marg{7274496}\marg{}}\% label
+ \marg{\AE\ (AE)}\% title
+\end{alltt}
+
+\subsection{\csfmt{bibglslettergroup}}
+\labelcs{bibglslettergroup}
+
+\begin{definition}
+\cs{bibglslettergroup}\margm{title}\margm{letter}\margm{id}\margm{type}
+\end{definition}
+This command is used to determine the letter group label. The
+default definition is \meta{type}\meta{id}, which ensures that no
+problematic characters occur in the label since \meta{type} can't
+contains special characters and \meta{id} is numeric. The
+\meta{type} is included in case there are multiple glossaries, since
+the hyperlink name must be unique.
+
+\subsection{\csfmt{bibglslettergrouptitle}}
+\labelcs{bibglslettergrouptitle}
+
+\begin{definition}
+\cs{bibglslettergrouptitle}\margm{title}\margm{letter}\margm{id}\margm{type}
+\end{definition}
+This command is used to determine the letter group title.
+The default definition is \cs{unexpanded}\margm{title}, which guards
+against any expansion issues that may arise with characters outside
+the basic Latin set.
+
+For example:
+\begin{verbatim}
+@entry{angstrom,
+ name={\AA ngstr\"om}
+ description={a unit of length equal to one hundred-millionth
+of a centimetre}
+}
+\end{verbatim}
+The \field{sort} value is \qtt{\AA ngstr\"om}. With \optref[en]{sort}
+the \meta{title} part will be \texttt{A} but with \optref[sv]{sort}
+the \meta{title} part will be \texttt{\AA}. In both cases the
+\meta{letter} argument will be \texttt{\AA}.
+
+Take care if you are using a script that needs encapsulating. For
+example, with the \sty{CJKutf8} package the CJK characters need to
+be placed within the \env{CJK} environment, so any letter group
+titles that contain CJK characters will need special attention.
+
+For example, suppose the \ext{bib} file contains entries in the
+form:
+\begin{alltt}
+\atentryref{dualentry}\marg{\meta{label},
+ name = \marg{\cs{cjkname}\margm{CJK characters}},
+ description = \margm{English description}
+}
+\end{alltt}
+and the document contains:
+\begin{verbatim}
+\usepackage{CJKutf8}
+\usepackage[record,style=indexgroup,nomain]{glossaries-extra}
+
+\newglossary*{japanese}{Japanese to English}
+\newglossary*{english}{English to Japanese}
+
+\newrobustcmd{\cjkname}[1]{\begin{CJK}{UTF8}{min}#1\end{CJK}}
+\glsnoexpandfields
+
+\GlsXtrLoadResources[
+ src=testcjk,% bib file
+ sort={ja-JP},% locale used to sort primary entries
+ dual-sort={en-GB},% locale used to sort secondary entries
+ type=japanese,% put the primary entries in the 'japanese' glossary
+ dual-type=english,% put the primary entries in the 'english' glossary
+ dual-prefix={en.}
+]
+\end{verbatim}
+then CJK characters will appear in the \meta{title} argument of
+\cs{bibglslettergrouptitle} which causes a problem because they need
+to be encapsulated within the \env{CJK} environment. This can be more
+conveniently done with the user supplied \csfmt{cjkname}, but the CJK
+characters need to be protected from expansion so \cs{unexpanded} is
+also needed. The new definition of \cs{bibglslettergrouptitle} needs
+to be defined before \cs{GlsXtrLoadResources}. For example:
+\begin{verbatim}
+\newcommand{\bibglslettergrouptitle}[4]{\unexpanded{\cjkname{#1}}}
+\end{verbatim}
+There's a slight problem here in that the English letter group titles
+also end up encapsulated. An alternative approach is to use the
+\meta{type} part to provide different forms. For example:
+\begin{verbatim}
+\newcommand*{\englishlettergroup}[1]{#1}
+\newcommand*{\japaneselettergroup}[1]{\cjkname{#1}}
+\newcommand{\bibglslettergrouptitle}[4]{%
+ \unexpanded{\csuse{#4lettergroup}{#1}}}
+\end{verbatim}
+(\csfmt{csuse} is provided by \sty{etoolbox}, which is automatically
+loaded by the \styfmt{glossaries} package.)
+
+\subsection{\csfmt{bibglssetothergrouptitle}}
+\labelcs{bibglssetothergrouptitle}
+
+The group label and title for non-alphabetic characters (symbols)
+are dealt with in a similar way to the letter groups, but in this
+case the title is set using
+\begin{definition}
+\cs{bibglssetothergrouptitle}\marg{\margm{character}\margm{id}\margm{type}}
+\end{definition}
+This is defined in an analogous manner:
+\begin{verbatim}
+\providecommand{\bibglssetothergrouptitle}[1]{%
+ \glsxtrsetgrouptitle{\bibglsothergroup#1}{\bibglsothergrouptitle#1}}
+\end{verbatim}
+where the group label is obtained using \csref{bibglsothergroup} and
+the group title is obtained from \csref{bibglsothergrouptitle}.
+Note that since non-alphabetic characters don't have upper or lower
+case versions, there are only three arguments. The other difference
+between this and the letter group version is that the \meta{id} is
+given in hexadecimal format (corresponding to the character code).
+
+For example, suppose my \ext{bib} file contains:
+\begin{verbatim}
+@entry{sauthor,
+ name={/Author},
+ description = {author string}
+}
+\end{verbatim}
+If a locale sort is used, the leading slash \texttt{/} will be
+ignored and this entry will belong to the \qt{A} letter group using
+the letter commands described above. If, instead, one of the
+character code sort methods are used, such as
+\optref[letter-case]{sort}, then this entry will be identified as
+belonging to a symbol (or \qt{other}) group and the title will be
+set using:
+\begin{verbatim}
+\bibglssetothergrouptitle{{/}{2F}{}}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsothergroup}}
+\labelcs{bibglsothergroup}
+
+\begin{definition}
+\cs{bibglsothergroup}\margm{character}\margm{id}\margm{type}
+\end{definition}
+This expands to the group label for symbol groups. This just
+defaults to \texttt{glssymbols} (ignoring all arguments), which
+replicates the label used when \app{makeindex} or \app{xindy}
+generate the glossary files.
+
+\subsection{\csfmt{bibglsothergrouptitle}}
+\labelcs{bibglsothergrouptitle}
+
+\begin{definition}
+\cs{bibglsothergrouptitle}\margm{character}\margm{id}\margm{type}
+\end{definition}
+This expands to the group title for symbol groups. This just
+expands to \cs{glssymbolsgroupname} by default.
+
+\subsection{\csfmt{bibglssetnumbergrouptitle}}
+\labelcs{bibglssetnumbergrouptitle}
+
+The numeric sort methods all create number groups instead of letter
+or symbol groups. These behave in an analogous way to the above.
+\begin{definition}
+\cs{bibglssetnumbergrouptitle}\marg{\margm{value}\margm{id}\margm{type}}
+\end{definition}
+In this case \meta{value} is the actual numeric sort value, and
+\meta{id} is a decimal number obtained from converting \meta{value}
+to an integer. This command is defined as
+\begin{verbatim}
+\providecommand{\bibglssetnumbergrouptitle}[1]{%
+ \glsxtrsetgrouptitle{\bibglsnumbergroup#1}{\bibglsnumbergrouptitle#1}}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsnumbergroup}}
+\labelcs{bibglsnumbergroup}
+
+The number group label is obtained from:
+\begin{definition}
+\cs{bibglsnumbergroup}\margm{value}\margm{id}\margm{type}
+\end{definition}
+This just defaults to \texttt{glsnumbers}.
+
+\subsection{\csfmt{bibglsnumbergrouptitle}}
+\labelcs{bibglsnumbergrouptitle}
+
+The number group title is obtained from:
+\begin{definition}
+\cs{bibglsnumbergrouptitle}\margm{value}\margm{id}\margm{type}
+\end{definition}
+This just defaults to \cs{glsnumbersgroupname}.
+
+\subsection{\csfmt{bibglshypergroup}}
+\labelcs{bibglshypergroup}
+
+\begin{definition}
+\cs{bibglshypergroup}\margm{type}\margm{group id}
+\end{definition}
+
+If the \ext{log} file indicates that \sty{hyperref} has been loaded
+and the \longarg{group} switch is used, then this command will be
+used to create the navigation information for glossary styles such
+as \glostyle{indexhypergroup}.
+
+\section{Flattened Entries}
+\label{sec:flattendefs}
+
+These commands relate to the way the \field{name} field is altered
+when flattening lonely child entries with the \optref{flatten-lonely}
+option.
+
+\subsection{\csfmt{bibglsflattenedhomograph}}
+\labelcs{bibglsflattenedhomograph}
+
+\begin{definition}
+\cs{bibglsflattenedhomograph}\margm{name}\margm{parent label}
+\end{definition}
+The default definition simply does \meta{name}.
+
+This command is used if the child and parent name's are identical.
+For example, suppose the \ext{bib} file contains:
+\begin{verbatim}
+@index{super.glossary, name={glossary}}
+
+@entry{glossarycol,
+ parent={super.glossary},
+ description={collection of glosses}
+}
+
+@entry{glossarylist,
+ parent={super.glossary},
+ description={list of technical words}
+}
+\end{verbatim}
+The child entries don't have a \field{name} field, so the value is assumed
+to be the same as the parent's \field{name} field. Here's an example
+document where both child entries are used:
+\begin{verbatim}
+\documentclass{article}
+
+\usepackage[record,subentrycounter,style=treenoname]{glossaries-extra}
+
+\GlsXtrLoadResources[src={entries}]
+
+\begin{document}
+\gls{glossarycol} (collection) vs \gls{glossarylist} (list).
+
+\printunsrtglossary
+\end{document}
+\end{verbatim}
+This uses one of the glossary styles designed for homographs and the
+glossary has the structure:
+\begin{flushleft}
+\textbf{glossary}\par
+\quad 1) collection of glosses 1\par
+\quad 2) list of technical words 1
+\end{flushleft}
+If only one child entry is selected, then the result looks a little
+odd. For example:
+\begin{flushleft}
+\textbf{glossary}\par
+\quad 1) collection of glosses 1
+\end{flushleft}
+With the \optref{flatten-lonely} option, the parent is removed and
+the child is moved up a hierarchical level. With
+\optref[postsort]{flatten-lonely} this would normally adjust the
+name so that it appears as \meta{parent name}, \meta{child name}
+but in this case it would look a little odd for the name to
+appear as \qt{glossary, glossary} so instead the name is
+set to
+\begin{verbatim}
+\bibglsflattenedhomograph{glossary}{super.glossary}
+\end{verbatim}
+(where the first argument is the original name and the second argument is the
+label of the parent entry).
+
+This means that the name simply appears as \qt{glossary}, even if
+the \optref[postsort]{flatten-lonely} option is used. Note that if
+the parent entry is removed, the parent label won't be of much use.
+You can test for existence using \cs{ifglsentryexists} (provided by
+the \sty{glossaries} package) in case you want to vary the way the
+name is displayed according to whether or not the parent is still
+present.
+
+\subsection{\csfmt{bibglsflattenedchildpresort}}
+\labelcs{bibglsflattenedchildpresort}
+
+\begin{definition}
+\cs{bibglsflattenedchildpresort}\margm{child name}\margm{parent name}
+\end{definition}
+
+Used by the \optref[presort]{flatten-lonely} option. This defaults
+to just \meta{child name}. If you want to change this, remember that
+you can let the interpreter know by adding the definition to
+\atentry{preamble}. For example:
+\begin{verbatim}
+@preamble{"\providecommand{\bibglsflattenedchildpresort}[2]{#1 (#2)}"}
+\end{verbatim}
+
+\subsection{\csfmt{bibglsflattenedchildpostsort}}
+\labelcs{bibglsflattenedchildpostsort}
+
+\begin{definition}
+\cs{bibglsflattenedchildpostsort}\margm{parent name}\margm{child name}
+\end{definition}
+
+Used by the \optref[postsort]{flatten-lonely} option. This defaults
+to \texttt{\meta{parent name}, \meta{child name}}.
+
+Note that the arguments are in the reverse order to those of the
+previous command. This is done to assist the automated first letter
+upper-casing. If either command is redefined to alter the ordering,
+then this can confuse the case-changing mechanism, in which case you
+may want to consider switching on the expansion of the \field{name}
+field using:
+\begin{verbatim}
+\glssetexpandfield{name}
+\end{verbatim}
+(before \cs{GlsXtrLoadResources}).
+
+\chapter{Converting Existing \filefmt{.tex} to \filefmt{.bib}}
+\label{sec:gls2bib}
+
+If you have already been using the \sty{glossaries} or
+\sty{glossaries-extra} package with a large file containing all your
+definitions using commands like \cs{newglossaryentry}, then you can
+use the supplementary tool \app{convertgls2bib} to convert the definitions
+to the \ext{bib} format required by \bibgls. The syntax is:
+\begin{alltt}
+convertgls2bib \oargm{options} \meta{tex file} \meta{bib file}
+\end{alltt}
+where \meta{tex file} is the \ext{tex} file and \meta{bib file} is
+the \ext{bib} file. This application is less secure than \bibgls\ as
+it doesn't use \app{kpsewhich} to check \texttt{openin\_any} and
+\texttt{openout\_any}. Take care not to accidentally overwrite
+existing \ext{bib} files as there's no check to determine if
+\meta{bib file} already exists.
+
+The \meta{options} are:
+\begin{description}
+\item[\longargfmt{texenc} \meta{encoding}] The character encoding of the
+\ext{tex} file. If omitted, the operating system's default encoding
+is assumed (or the Java Virtual Machine's).
+
+\item[\longargfmt{bibenc} \meta{encoding}] The character encoding of the
+\ext{bib} file. If omitted, the same encoding as the
+\ext{tex} file is assumed.
+
+\item[\longargfmt{space-sub} \meta{replacement}] The \ext{bib}
+format doesn't allow spaces in labels. If your original
+definitions in your \ext{tex} file have spaces, use this option to
+replace spaces in labels. Each space will be substituted with
+\meta{replacement}. The cross-referencing fields, \field{see},
+\field{seealso} and \field{alias}, will also be adjusted, but any
+references using \cs{gls} etc will have to be substituted manually
+(or use a global search and replace in your text editor).
+If you want to strip the spaces, use an empty string for
+\meta{replacement}. You'll need to delimit this according to your
+operating system. For example:
+\begin{verbatim}
+gls2bib --space-sub '' entries.tex entries.bib
+\end{verbatim}
+
+\item[\longargfmt{help} or \shortargfmt{h}] Display help message and
+quit.
+\item[\longargfmt{version} or \shortargfmt{v}] Display version
+information and quit.
+\end{description}
+
+This application recognises the commands listed below. Avoid any
+overly complicated code within the \ext{tex} file. The \TeX\ parser
+library isn't a \TeX\ engine!
+In all cases below, if \meta{\keyvallist} contains
+\begin{alltt}
+see=[\cs{seealsoname}]\margm{label(s)}
+\end{alltt}
+this will be substituted with
+\begin{alltt}
+seealso=\margm{label(s)}
+\end{alltt}
+For example:
+\begin{verbatim}
+\newterm[see={[\seealsoname]goose}]{duck}
+\end{verbatim}
+will be written as
+\begin{verbatim}
+@index{duck,
+ seealso = {goose}
+}
+\end{verbatim}
+(The \field{seealso} key is provided by \sty{glossaries-extra}
+v1.16+.)
+
+Additionally, if \meta{\keyvallist} contains
+\begin{alltt}
+type=\marg{\cs{glsdefaulttype}}
+\end{alltt}
+then this field will be ignored. (This \field{type} value is
+recommended in \meta{\keyvallist} when loading files with
+\cs{loadglsentries}\oargm{type}\margm{file} to allow the optional
+argument to set the \field{type}. With \bibgls\ you can use the
+\optref{type} option instead.)
+
+\section{\cs{newglossaryentry}}
+The base \sty{glossaries} package provides:
+\begin{definition}
+\cs{newglossaryentry}\margm{label}\margm{\keyvallist}
+\end{definition}
+
+This is converted to:
+\begin{alltt}
+\atentryref{entry}\marg{\meta{label},
+ \meta{\keyvallist}
+}
+\end{alltt}
+
+\cs{newentry} (provided by the \sty{glossaries-extra}
+\styopt{shortcuts} option) is recognised as a synonym of \cs{newglossaryentry}.
+
+\section{\cs{provideglossaryentry}}
+The base \sty{glossaries} package provides:
+\begin{definition}
+\cs{provideglossaryentry}\margm{label}\margm{\keyvallist}
+\end{definition}
+
+This is converted to:
+\begin{alltt}
+\atentryref{entry}\marg{\meta{label},
+ \meta{\keyvallist}
+}
+\end{alltt}
+but only if \meta{label} hasn't already been defined.
+
+\section{\cs{longnewglossaryentry}}
+The base \sty{glossaries} package provides:
+\begin{definition}
+\cs{longnewglossaryentry}\margm{label}\margm{\keyvallist}\margm{description}
+\end{definition}
+
+This is converted to:
+\begin{alltt}
+\atentryref{entry}\marg{\meta{label},
+ \meta{\keyvallist},
+ description = \margm{description}
+}
+\end{alltt}
+
+The starred version provided by the \sty{glossaries-extra} package
+is also recognised. The unstarred version strips trailing spaces
+from \meta{description}. (This doesn't add \cs{nopostdesc}, but
+\sty{glossaries-extra} defaults to \styopt{nopostdot}.)
+
+\section{\cs{longprovideglossaryentry}}
+
+The base \sty{glossaries} package provides:
+\begin{definition}
+\cs{longprovideglossaryentry}\margm{label}\margm{\keyvallist}\margm{description}
+\end{definition}
+
+As above, but only if \meta{label} hasn't already been defined.
+
+\section{\cs{newterm}}
+The base \sty{glossaries} package provides:
+\begin{definition}
+\cs{newterm}\oargm{\keyvallist}\margm{label}
+\end{definition}
+(when the \styopt{index} option is used).
+
+This is converted to:
+\begin{alltt}
+\atentryref{index}\marg{\meta{label},
+ \meta{\keyvallist}
+}
+\end{alltt}
+if the optional argument is present, otherwise it's just converted
+to:
+\begin{alltt}
+\atentryref{index}\marg{\meta{label}}
+\end{alltt}
+
+If \longargfmt{space-sub} is used and \meta{label} contains one or
+more spaces, then \field{name} will be set if not included in
+\meta{\keyvallist}. For example, if \texttt{entries.bib}
+contains
+\begin{verbatim}
+\newterm{sea lion}
+\newterm[seealso={sea lion}]{seal}
+\end{verbatim}
+then
+\begin{verbatim}
+gls2bib --space-sub '-' entries.bib entries.tex
+\end{verbatim}
+will write the terms to \texttt{entries.tex} as
+\begin{verbatim}
+@index{sea-lion,
+ name = {sea lion}
+}
+
+@index{seal,
+ seealso = {sea-lion}
+}
+\end{verbatim}
+whereas just
+\begin{verbatim}
+gls2bib entries.bib entries.tex
+\end{verbatim}
+will write the terms to \texttt{entries.tex} as
+\begin{verbatim}
+@index{sea lion}
+
+@index{seal,
+ seealso = {sea lion}
+}
+\end{verbatim}
+which will cause a problem when the \ext{bib} file is parsed
+by \bibgls\ (and will probably also cause a problem for
+bibliographic management systems).
+
+\section{\cs{newabbreviation}}
+The \sty{glossaries-extra} package provides:
+\begin{definition}
+\cs{newabbreviation}\oargm{\keyvallist}\margm{label}\margm{short}\margm{long}
+\end{definition}
+
+This is converted to:
+\begin{alltt}
+\atentryref{abbreviation}\marg{\meta{label},
+ short = \margm{short},
+ long = \margm{long},
+ \meta{\keyvallist}
+}
+\end{alltt}
+if the optional argument is present, otherwise it's converted to:
+\begin{alltt}
+\atentryref{abbreviation}\marg{\meta{label},
+ short = \margm{short},
+ long = \margm{long}
+}
+\end{alltt}
+
+\section{\cs{newacronym}}
+The base \sty{glossaries} package provides:
+\begin{definition}
+\cs{newacronym}\oargm{\keyvallist}\margm{label}\margm{short}\margm{long}
+\end{definition}
+(which is redefined by \sty{glossaries-extra} to use
+\cs{newabbreviation}).
+
+As above but uses \atentryref{acronym} instead.
+
+\section{\cs{glsxtrnewsymbol}}
+The \sty{glossaries-extra} package provides:
+\begin{definition}
+\cs{glsxtrnewsymbol}\oargm{\keyvallist}\margm{label}\margm{symbol}
+\end{definition}
+(when the \styopt{symbols} option is used).
+
+This is converted to:
+\begin{alltt}
+\atentryref{symbol}\marg{\meta{label},
+ name = \margm{symbol}
+}
+\end{alltt}
+if the optional argument is missing, otherwise it's converted to:
+\begin{alltt}
+\atentryref{symbol}\marg{\meta{label},
+ name = \margm{symbol},
+ \meta{\keyvallist}
+}
+\end{alltt}
+unless \meta{\keyvallist} contains the \field{name} field,
+in which case it's converted to:
+\begin{alltt}
+\atentryref{symbol}\marg{\meta{label},
+ \meta{\keyvallist}
+}
+\end{alltt}
+
+\cs{newsym} (provided by the \styopt{shortcuts} option) is recognised
+as a synonym for \cs{glsxtrnewsymbol}.
+
+\section{\cs{glsxtrnewnumber}}
+The \sty{glossaries-extra} package provides:
+\begin{definition}
+\cs{glsxtrnewnumber}\oargm{\keyvallist}\margm{label}
+\end{definition}
+(when the \styopt{numbers} option is used).
+
+This is converted to:
+\begin{alltt}
+\atentryref{number}\marg{\meta{label},
+ name = \margm{label}
+}
+\end{alltt}
+if the optional argument is missing, otherwise it's converted to:
+\begin{alltt}
+\atentryref{number}\marg{\meta{label},
+ name = \margm{label},
+ \meta{\keyvallist}
+}
+\end{alltt}
+if \field{name} isn't listed in \meta{\keyvallist},
+otherwise it's converted to:
+\begin{alltt}
+\atentryref{number}\marg{\meta{label},
+ \meta{\keyvallist}
+}
+\end{alltt}
+
+\cs{newnum} (provided by the \styopt{shortcuts} option) is
+recognised as a synonym for \cs{glsxtrnewnumber}.
+
+\section{\cs{newdualentry}}
+
+\begin{definition}
+\cs{newdualentry}\oargm{\keyvallist}\margm{label}\margm{short}\margm{long}\margm{description}
+\end{definition}
+
+This command isn't provided by either \sty{glossaries} or
+\sty{glossaries-extra} but is used as an example in the
+\sty{glossaries} user manual and in the sample file
+\file{sample-dual.tex} that accompanies the \sty{glossaries}
+package. Since this command seems to be used quite a bit (given the
+number of times it crops up on sites like
+\href{https://tex.stackexchange.com/}{\TeX\ on StackExchange}),
+\appfmt{convertgls2bib} also supports it unless this command is
+defined using \csfmt{newcommand} or \csfmt{renewcommand} in the
+input file. In which case the default definition will be overridden.
+
+If the command definition isn't overridden, then it's converted to
+\begin{alltt}
+\atentryref{dualentryabbreviation}\marg{\meta{label},
+ short = \margm{short},
+ long = \margm{long},
+ description = \margm{description},
+ \meta{\keyvallist}
+}
+\end{alltt}
+if \meta{\keyvallist} is supplied, otherwise it's converted to:
+\begin{alltt}
+\atentryref{dualentryabbreviation}\marg{\meta{label},
+ short = \margm{short},
+ long = \margm{long},
+ description = \margm{description}
+}
+\end{alltt}
+
+For example, if the original \filefmt{.tex} file contains
+\begin{verbatim}
+\newcommand*{\newdualentry}[5][]{%
+ \newglossaryentry{main-#2}{name={#4},%
+ text={#3\glsadd{#2}},%
+ description={#5},%
+ #1
+ }%
+ \newacronym{#2}{#3\glsadd{main-#2}}{#4}
+}
+
+\newdualentry{svm}% label
+ {SVM}% abbreviation
+ {support vector machine}% long form
+ {Statistical pattern recognition technique}% description
+\end{verbatim}
+then the \filefmt{.bib} file will contain
+\begin{verbatim}
+@entry{main-svm,
+ name = {support vector machine},
+ description = {Statistical pattern recognition technique},
+ text = {SVM\glsadd{svm}}
+}
+
+@acronym{svm,
+ short = {SVM\glsadd{main-svm}},
+ long = {support vector machine}
+}
+\end{verbatim}
+since \cs{newdualentry} was defined with \cs{newcommand}. However,
+if the original file uses \cs{providecommand} or omits the
+definition of \cs{newdualentry}, then the \filefmt{.bib} file will
+contain:
+\begin{verbatim}
+@dualentryabbreviation{svm,
+ short = {SVM},
+ description = {Statistical pattern recognition technique},
+ long = {support vector machine}
+}
+\end{verbatim}
+
+\resetsecnumdepth
+\printindex
+\end{document}
diff --git a/Master/texmf-dist/source/support/bib2gls/src/gls2bib-src.zip b/Master/texmf-dist/source/support/bib2gls/src/gls2bib-src.zip
new file mode 100644
index 00000000000..a99d9e215aa
--- /dev/null
+++ b/Master/texmf-dist/source/support/bib2gls/src/gls2bib-src.zip
Binary files differ
diff --git a/Master/texmf-dist/source/support/bib2gls/src/texparser-src.zip b/Master/texmf-dist/source/support/bib2gls/src/texparser-src.zip
new file mode 100644
index 00000000000..2d68d27209f
--- /dev/null
+++ b/Master/texmf-dist/source/support/bib2gls/src/texparser-src.zip
Binary files differ
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index 08da819aa52..b55d1f1c6c4 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -87,7 +87,7 @@ my @TLP_working = qw(
beebe begingreek begriff beilstein belleek bengali
bera berenisadf besjournals bestpapers betababel beton beuron
bewerbung bez123 bezos bgreek bgteubner bguq bhcexam
- bib-fr bibarts biber bibhtml
+ bib-fr bib2gls bibarts biber bibhtml
biblatex biblatex-abnt biblatex-anonymous biblatex-apa
biblatex-archaeology biblatex-arthistory-bonn
biblatex-bookinarticle biblatex-bookinother biblatex-bwl
diff --git a/Master/tlpkg/libexec/ctan2tds b/Master/tlpkg/libexec/ctan2tds
index 8c604f3a178..2d20b21ff6f 100755
--- a/Master/tlpkg/libexec/ctan2tds
+++ b/Master/tlpkg/libexec/ctan2tds
@@ -1293,6 +1293,7 @@ chomp ($Build = `cd $Master/../Build/source && pwd`);
'apalike' => '&POSTapalike',
'asapsym' => '&POSTasapsym',
'autosp' => '&POSTautosp',
+ 'bib2gls' => '&POSTbib2gls',
'biber' => '&POSTbiber',
'biblatex' => '&POSTbiblatex',
'bibtex' => '&POSTbibtex',
@@ -2263,6 +2264,7 @@ $standardsource = '(\.(bat|c|drv|dtx|fea|fdd|ins|sfd)'
'arabxetex', 'NULL', # dtx with others, why not
'babelbib', 'NULL', # dtx with others, why not
'bbold', $standardsource . '|fonttabl.sty',
+ 'bib2gls', 'src/',
'biber', '.', # everything, lots to do in post
'bibtexperllibs', '.', # everything
'bigints', 'NULL',
@@ -2760,6 +2762,7 @@ $standardttf = '\.ttf|\.TTC';
# scripts to install under texmf*/.../scripts, but not bindir.
%specialscripts_nobin = (
+ 'bib2gls' => '\.jar$',
'changes' => '\.bash$',
'cloze' => '\.lua$',
'epspdf' => '(epspdf(|\.help|boot|tk)|\.rb|makegray\.pro)$',
@@ -2793,6 +2796,7 @@ $standardttf = '\.ttf|\.TTC';
'adhocfilelist' => 'adhocfilelist\.sh$',
'arara' => 'arara\.sh$',
'authorindex' => 'authorindex$',
+ 'bib2gls' => '\.sh$',
'bibexport' => 'bibexport\.sh$',
'bundledoc' => '(arlatex|bundledoc)$',
'checkcites' => '\.lua$',
@@ -3661,8 +3665,9 @@ sub doscripts {
if $linkname eq "texdef"; # latexdef->texdef
} else {
- # Windows. If a shell script, usually skip. Else copy the wrapper.
- if ($s !~ /arara|texosquery/) { # java programs, want wrapper.
+ # Windows. If a shell script, usually skip, except for Java
+ # programs. Else copy the wrapper.
+ if ($s !~ /arara|bib2gls|convertgls2bib|texosquery/) {
next if $s =~ /\.sh$/ && $s !~ /-sys\.sh$/;
}
#
@@ -5418,6 +5423,15 @@ sub POSTautosp {
&preserve_man_pages ($package);
}
+sub POSTbib2gls {
+ print "POST$package - resources xml, src dir\n";
+ my $resources_dir = "$DEST/scripts/$package/resources";
+ &mv_with_mkdir ("$package-en.xml", $resources_dir);
+ #
+ my $source_dir = "$DEST/source/support/$package";
+ &SYSTEM ("$MV src $source_dir");
+}
+
sub POSTbiber {
print "POST$package - unpack and install binaries\n";
# we've started with everything under source/.
diff --git a/Master/tlpkg/tlpsrc/bib2gls.tlpsrc b/Master/tlpkg/tlpsrc/bib2gls.tlpsrc
new file mode 100644
index 00000000000..1b71f7bdd0d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/bib2gls.tlpsrc
@@ -0,0 +1,2 @@
+binpattern f bin/${ARCH}/${PKGNAME}
+binpattern f bin/${ARCH}/convertgls2bib
diff --git a/Master/tlpkg/tlpsrc/collection-bibtexextra.tlpsrc b/Master/tlpkg/tlpsrc/collection-bibtexextra.tlpsrc
index 59b7f3bf87b..90ea8e53f7c 100644
--- a/Master/tlpkg/tlpsrc/collection-bibtexextra.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-bibtexextra.tlpsrc
@@ -14,6 +14,7 @@ depend archaeologie
depend beebe
depend besjournals
depend bestpapers
+depend bib2gls
depend bibarts
depend biber
depend bibexport