1 files changed, 19 insertions, 25 deletions
diff --git a/Master/texmf-dist/tex/latex/hyperxmp/hyperxmp.sty b/Master/texmf-dist/tex/latex/hyperxmp/hyperxmp.sty
index 282bebe5177..1afc3a185e7 100644
--- a/Master/texmf-dist/tex/latex/hyperxmp/hyperxmp.sty
+++ b/Master/texmf-dist/tex/latex/hyperxmp/hyperxmp.sty
@@ -22,7 +22,7 @@
 %% 
 \NeedsTeXFormat{LaTeX2e}[1999/12/01]
 \ProvidesPackage{hyperxmp}
-    [2017/07/25 v3.3 Store hyperref metadata in XMP format]
+    [2017/11/26 v3.4 Store hyperref metadata in XMP format]
 \edef\hyxmp@dq@code{\the\catcode`\"}
 \catcode`\"=12
 \def\hyxmp@driver{hpdftex}
@@ -37,6 +37,9 @@
 \RequirePackage{stringenc}
 \RequirePackage{intcalc}
 \RequirePackage{ifxetex}
+\RequirePackage{ifmtarg}
+\def\@ifmtargexp#1{\expandafter\@ifmtarg\expandafter{#1}}
+\def\@ifnotmtargexp#1{\expandafter\@ifnotmtarg\expandafter{#1}}
 \newcommand{\hyxmp@pdfstringdef}[2]{%
   \let\hyxmp@textunderscore=\textunderscore
   \let\textunderscore=\hyxmp@uscore
@@ -208,18 +211,18 @@ provide metadata values to hyperxmp}%
     \else
       \edef\hyxmp@today{\@pdfdatetime}%
     \fi
-    \ifx\@pdftitle\@empty
-      \ifx\@title\@empty
-      \else
+    \@ifmtargexp{\@pdftitle}{%
+      \@ifnotmtargexp{\@title}{%
         \hypersetup{pdftitle={\@title}}%
-      \fi
-    \fi
-    \ifx\@pdfauthor\@empty
-      \ifx\@author\@empty
-      \else
+      }%
+    }%
+    {}%
+    \@ifmtargexp{\@pdfauthor}{%
+      \@ifnotmtargexp{\@author}{%
         \hypersetup{pdfauthor={\@author}}%
-      \fi
-    \fi
+      }%
+    }%
+    {}%
     \hyxmp@at@end{%
       \hyxmp@find@metadata
       \hyxmp@embed@packet
@@ -713,7 +716,7 @@ disabled}%
   \hyxmp@append@hex@iv#1%
 }
 \newcommand*{\hyxmp@def@DocumentID}{%
-  \edef\hyxmp@seed@string{\jobname:\@pdftitle:\@pdfauthor}%
+  \edef\hyxmp@seed@string{\jobname:\@pdftitle:\@pdfauthor:}%
   \expandafter\hyxmp@seed@rng\expandafter{\hyxmp@seed@string}%
   \edef\hyxmp@rand@num{\the\@tempcnta}%
   \hyxmp@create@uuid\hyxmp@DocumentID
@@ -800,11 +803,7 @@ _________<#1>\hyxmp@xmlified</#1>^^J%
   \fi
 }
 \newcommand*{\hyxmp@rdf@dc}[3][\iffalse]{%
-  \@tempswafalse
-  \ifx#3\@empty
-  \else
-    \@tempswatrue
-  \fi
+  \@ifmtargexp{#3}{\@tempswafalse}{\@tempswatrue}%
   #1
     \@tempswatrue
   \fi
@@ -839,11 +838,7 @@ _________</dc:#2>^^J%
   \fi
 }%
 \newcommand*{\hyxmp@list@to@xml}[4][\iffalse]{%
-  \@tempswafalse
-  \ifx#4\@empty
-  \else
-    \@tempswatrue
-  \fi
+  \@ifmtargexp{#4}{\@tempswafalse}{\@tempswatrue}%
   #1
     \@tempswatrue
   \fi
@@ -1001,8 +996,7 @@ ______</rdf:Description>^^J%
   \gdef\xmplinesep{&#xA;}
 \endgroup
 \newcommand*{\hyxmp@list@to@lines}[2]{%
-  \ifx#2\@empty
-  \else
+  \@ifnotmtargexp{#2}{%
     \bgroup
       \hyxmp@add@to@xml{%
 _________<#1>%
@@ -1020,7 +1014,7 @@ _________<#1>%
       \hyxmp@list
       \hyxmp@add@to@xml{</#1>^^J}%
     \egroup
-  \fi
+  }%
 }
 \gdef\hyxmp@photometa@schema{%
   \edef\hyxmp@photometa@data{%