projlib (12mar22) (branch)

git-svn-id: svn://tug.org/texlive/branches/branch2021.final@62662 c570f23f-e606-0410-a88d-b1316a301751

13 files changed, 5043 insertions, 171 deletions

diff --git a/Master/texmf-dist/doc/latex/projlib/README.md b/Master/texmf-dist/doc/latex/projlib/README.md
index 3b5a6fbcf87..b36f8f2437d 100644
--- a/Master/texmf-dist/doc/latex/projlib/README.md
+++ b/Master/texmf-dist/doc/latex/projlib/README.md
@@ -2,9 +2,9 @@
 
 # ProjLib Toolkit
 
-The bundle is dated 2022/03/09
+The bundle is dated 2022/03/11.
 
-Old modules are still dated 2021/12/16 and will *not* be modified. When all the new modules are finished, old files shall be removed from this bundle.
+Old modules are still dated 2021/12/16 and will *not* be modified. **When all the new modules and the corresponding documentations are finished, old files shall be removed from this bundle.**
 
 ## **Important note**
 
@@ -25,7 +25,7 @@ The new modules are:
 
 When all these modules are finished, the documentation will be updated accordingly.
 
-Below are the old README.
+Below is the content of the old README.
 
 ---
 
diff --git a/Master/texmf-dist/source/latex/projlib/ProjLib.dtx b/Master/texmf-dist/source/latex/projlib/ProjLib.dtx
new file mode 100644
index 00000000000..39ba3ccd037
--- /dev/null
+++ b/Master/texmf-dist/source/latex/projlib/ProjLib.dtx
@@ -0,0 +1,4569 @@
+% \iffalse meta-comment
+%
+% Copyright (C) 2021-2022 by Jinwen XU
+% ------------------------------------
+%
+% This file may be distributed and/or modified under the conditions of the LaTeX
+% Project Public License, either version 1.3c of this license or (at your option)
+% any later version. The latest version of this license is in:
+%
+%    http://www.latex-project.org/lppl.txt
+%
+% \fi
+%
+%<*driver>
+\ProvidesFile{ProjLib.dtx}
+%</driver>
+\NeedsTeXFormat{LaTeX2e}[2020-10-01]
+\RequirePackage{l3keys2e}
+%
+%<*ProjLib>
+\ProvidesExplPackage
+  {ProjLib}
+  {2022/03/11} {}
+  {Collective interface of the ProjLib toolkit}
+%</ProjLib>
+%
+%<*projlib-author>
+\ProvidesExplPackage
+  {projlib-author}
+  {2022/03/11} {}
+  {Enhanced author information block}
+%</projlib-author>
+%
+%<*projlib-datetime>
+\ProvidesExplPackage
+  {projlib-datetime}
+  {2022/03/11} {}
+  {Convert numeric date-time string to natural language}
+%</projlib-datetime>
+%
+%<*projlib-draft>
+\ProvidesExplPackage
+  {projlib-draft}
+  {2022/03/11} {}
+  {Useful commands during draft stage}
+%</projlib-draft>
+%
+%<*projlib-font>
+\ProvidesExplPackage
+  {projlib-font}
+  {2022/03/11} {}
+  {Font selection and configuration}
+%</projlib-font>
+%
+%<*projlib-language>
+\ProvidesExplPackage
+  {projlib-language}
+  {2022/03/11} {}
+  {Multi-language configuration}
+%</projlib-language>
+%
+%<*projlib-logo>
+\ProvidesExplPackage
+  {projlib-logo}
+  {2022/03/11} {}
+  {The ProjLib logo}
+%</projlib-logo>
+%
+%<*projlib-math>
+\ProvidesExplPackage
+  {projlib-math}
+  {2022/03/11} {}
+  {Efficient math setup}
+%</projlib-math>
+%
+%<*projlib-paper>
+\ProvidesExplPackage
+  {projlib-paper}
+  {2022/03/11} {}
+  {Configuration of the paper style}
+%</projlib-paper>
+%
+%<*projlib-theorem>
+\ProvidesExplPackage
+  {projlib-theorem}
+  {2022/03/11} {}
+  {Configuration of theorem-like environments}
+%</projlib-theorem>
+
+%<*ProjLib>
+\keys_define:nn { ProjLib }
+  {
+    , author          .bool_set:N         = \l__projlib_main_author_bool
+    , author          .initial:n          = { false }
+    , author-block    .bool_set:N         = \l__projlib_main_author_bool
+    , author~block    .bool_set:N         = \l__projlib_main_author_bool
+    , author block    .bool_set:N         = \l__projlib_main_author_bool
+    , ams-fashion     .bool_set:N         = \l__projlib_main_amsfashion_bool
+    , ams-fashion     .initial:n          = { false }
+    , ams~fashion     .bool_set:N         = \l__projlib_main_amsfashion_bool
+    , ams fashion     .bool_set:N         = \l__projlib_main_amsfashion_bool
+    , unknown         .code:n             = {
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-language }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-author }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-datetime }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-draft }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-font }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-logo }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-math }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-paper }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-theorem }
+                                            }
+  }
+\ProcessKeysOptions { ProjLib }
+
+\bool_if:NT \l__projlib_main_amsfashion_bool
+  {
+    \bool_set_true:N \l__projlib_main_author_bool
+    \PassOptionsToPackage { amsfashion } { projlib-author }
+  }
+
+\RequirePackage { projlib-language }
+
+\bool_if:NT \l__projlib_main_author_bool
+  {
+    \RequirePackage { projlib-author }
+  }
+\RequirePackage { projlib-datetime }
+\RequirePackage { projlib-draft }
+\RequirePackage { projlib-font }
+\RequirePackage { projlib-logo }
+\RequirePackage { projlib-math }
+\RequirePackage { projlib-paper }
+
+\RequirePackage { projlib-theorem }
+%</ProjLib>
+%
+%<*projlib-author>
+\keys_define:nn { projlib-author }
+  {
+    , ams-fashion .bool_set:N = \l__projlib_author_amsfashion_bool
+    , ams-fashion .initial:n  = { false }
+    , ams~fashion .bool_set:N = \l__projlib_author_amsfashion_bool
+    , ams fashion .bool_set:N = \l__projlib_author_amsfashion_bool
+    , unknown     .code:n     = {}
+  }
+\ProcessKeysOptions { projlib-author }
+
+\cs_if_exist:NT \subjclass { \endinput }
+
+\tl_new:N   \g__projlib_author_font_author_tl
+\tl_new:N   \g__projlib_author_font_address_tl
+\tl_new:N   \g__projlib_author_font_curraddr_tl
+\tl_new:N   \g__projlib_author_font_email_tl
+
+\tl_gset:Nn \g__projlib_author_font_author_tl      { \normalsize \normalfont \scshape }
+\tl_gset:Nn \g__projlib_author_font_address_tl     { \small \normalfont \itshape }
+\tl_gset:Nn \g__projlib_author_font_curraddr_tl    { \small \normalfont \itshape }
+\tl_gset:Nn \g__projlib_author_font_email_tl       { \small \normalfont \ttfamily }
+
+\dim_new:N  \g__projlib_author_length_innersep_dim
+\dim_new:N  \g__projlib_author_length_sep_dim
+\dim_new:N  \g__projlib_author_length_aftersep_dim
+
+\dim_set:Nn \g__projlib_author_length_innersep_dim { 0.3 \baselineskip }
+\dim_set:Nn \g__projlib_author_length_sep_dim      { 0.5 \baselineskip }
+\dim_set:Nn \g__projlib_author_length_aftersep_dim { 0.3 \baselineskip }
+
+
+\bool_new:N \g__projlib_author_affil_already_exist_bool
+
+\NewCommandCopy \projlib_author_backup_author:w \author
+\RenewDocumentCommand \author { m }
+  {
+    \hook_gput_code:nnn { cmd/@author/after } { projlib-author }
+      {
+        \phantom {A} \\[-\baselineskip]
+        \skip_vertical:n { \g__projlib_author_length_sep_dim }
+        { \g__projlib_author_font_author_tl #1 }
+        \bool_set_false:N \g__projlib_author_affil_already_exist_bool
+        \\ \phantom {}
+      }
+  }
+
+\ProvideDocumentCommand \address { m }
+  {
+    \hook_gput_code:nnn { cmd/@author/after } { projlib-author }
+      {
+        \phantom {A} \\[-\baselineskip]
+        \bool_if:NF \g__projlib_author_affil_already_exist_bool
+          {
+            \skip_vertical:n { \g__projlib_author_length_innersep_dim }
+          }
+        \bool_set_true:N \g__projlib_author_affil_already_exist_bool
+        { \g__projlib_author_font_address_tl #1 }
+        \\ \phantom {}
+      }
+  }
+
+\ProvideDocumentCommand \curraddr { m }
+  {
+    \hook_gput_code:nnn { cmd/@author/after } { projlib-author }
+      {
+        \phantom {A} \\[-\baselineskip]
+        \bool_if:NF \g__projlib_author_affil_already_exist_bool
+          {
+            \skip_vertical:n { \g__projlib_author_length_innersep_dim }
+          }
+        \bool_set_true:N \g__projlib_author_affil_already_exist_bool
+        { \g__projlib_author_font_curraddr_tl #1 }
+        \\ \phantom {}
+      }
+  }
+
+\ProvideDocumentCommand \email { m }
+  {
+    \hook_gput_code:nnn { cmd/@author/after } { projlib-author }
+      {
+        \phantom {A} \\[-\baselineskip]
+        \bool_if:NF \g__projlib_author_affil_already_exist_bool
+          {
+            \skip_vertical:n { \g__projlib_author_length_innersep_dim }
+          }
+        \bool_set_true:N \g__projlib_author_affil_already_exist_bool
+        { \g__projlib_author_font_email_tl #1 }
+        \\ \phantom {}
+      }
+  }
+
+\RequirePackage { regexpatch }
+
+\xpatchcmd { \@maketitle } { \begin{tabular}[t]{c} } {} {
+  \xpatchcmd { \@maketitle } { \end{tabular} } {} {} {}
+} {}
+
+\tl_set:cn {@author} {}
+
+\hook_gput_code:nnn { cmd/@maketitle/before } { projlib-author }
+  {
+    \hook_gput_code:nnn { cmd/@author/before } { projlib-author }
+      {
+        \skip_vertical:n { - \g__projlib_author_length_sep_dim }
+      }
+    \hook_gput_code:nnn { cmd/@author/after } { projlib-author }
+      {
+        \skip_vertical:n { - \baselineskip }
+        \bool_if:NT \g__projlib_author_affil_already_exist_bool
+          {
+            \skip_vertical:n { \g__projlib_author_length_aftersep_dim }
+          }
+      }
+  }
+
+\bool_if:NT \l__projlib_author_amsfashion_bool
+  {
+    \RequirePackage{ projlib-language }
+
+    \tl_new:N   \g_projlib_author_keywordsname_style_tl
+    \tl_gset:Nn \g_projlib_author_keywordsname_style_tl {}
+
+    \projlib_langauge_define_multilingual_text:Nn \keywordsname
+      {
+        EN = \textsc{Key~words~and~phrases}         ,
+        FR = \textsc{Mots~et~phrases~clés}          ,
+        DE = \textsc{Schlüsselwörter~und~Phrasen}   ,
+        IT = \textsc{Parole~e~frasi~chiave}         ,
+        PT = \textsc{Palavras~e~frases~chave}       ,
+        BR = \textsc{Palavras~e~frases~chave}       ,
+        ES = \textsc{Palabras~y~frases~clave}       ,
+        CN = 关键词                                 ,
+        TC = 關鍵詞                                 ,
+        JP = キーワード                             ,
+        RU = Ключевые~слова~и~фразы                 ,
+      }
+
+    \tl_new:N \g__projlib_author_keywords_tl
+    \NewDocumentCommand \keywords { m }
+      {
+        \tl_gset:Nn \g__projlib_author_keywords_tl { #1 }
+      }
+
+    \tl_new:N \g__projlib_author_dedicatory_tl
+    \NewDocumentCommand \dedicatory { m }
+      {
+        \tl_gset:Nn \g__projlib_author_dedicatory_tl { #1 }
+      }
+
+    \hook_gput_code:nnn { begindocument/before } { projlib-author }
+      {
+        \NewCommandCopy \projlib_author_backup_footnotemark: \footnotemark
+        \tl_gset:Nn \footnotemark {}
+
+        \NewCommandCopy \projlib_author_backup_thanks:w \thanks
+        \cs_undefine:N \thanks
+
+        % measure the width of "*"
+        \hbox_set:Nn \l_tmpa_box { * }
+        \dim_const:Nn \c__projlib_author_length_width_of_asterisk_dim { \box_wd:N \l_tmpa_box }
+
+        \cs_new_nopar:Nn \projlib_author_pre_thanks:n
+          {
+            \projlib_author_backup_thanks:w
+              {
+                \skip_horizontal:n { - \c__projlib_author_length_width_of_asterisk_dim }
+                #1
+              }
+          }
+
+        \NewDocumentCommand \thanks { m }
+          {
+            \tl_if_blank:nF { #1 }
+              {
+                \hook_gput_code:nnn { cmd/@title/after } { projlib-author }
+                  {
+                    \projlib_author_pre_thanks:n { #1 }
+                  }
+              }
+          }
+
+        \NewCommandCopy \projlib_author_backup_my_author:w \author
+        \RenewDocumentCommand \author { m }
+          {
+            \projlib_author_backup_my_author:w
+              {
+                \RenewCommandCopy \footnotemark \projlib_author_backup_footnotemark:
+                \RenewCommandCopy \thanks \projlib_author_backup_thanks:w
+                #1
+                \cs_undefine:N \footnotemark
+              }
+          }
+      }
+
+    \NewCommandCopy \projlib_author_backup_abstract: \abstract
+    \NewCommandCopy \projlib_author_backup_endabstract: \endabstract
+    \cs_undefine:N \abstract
+    \cs_undefine:N \endabstract
+
+    \bool_new:N \g__projlib_author_already_maketitle_bool
+    \bool_gset_false:N \g__projlib_author_already_maketitle_bool
+    \bool_new:N \g__projlib_author_abstract_before_maketitle_bool
+    \bool_gset_false:N \g__projlib_author_abstract_before_maketitle_bool
+
+    \msg_redirect_name:nnn { scontents } { unsupported-verbatim } { info }
+    \RequirePackage{ scontents }
+    \newenvsc{abstract}[store-env=projlib-author-abstract,print-env=false]
+
+    \hook_gput_code:nnn { env/abstract/after } { projlib-author }
+      {
+        \bool_if:NTF \g__projlib_author_already_maketitle_bool
+          {
+            \projlib_author_backup_abstract:
+              \getstored{projlib-author-abstract}
+            \projlib_author_backup_endabstract:
+          }
+          {
+            \bool_gset_true:N \g__projlib_author_abstract_before_maketitle_bool
+          }
+      }
+
+    \hook_gput_code:nnn { begindocument/before } { projlib-author }
+      {
+        \makeatletter
+        \xpatchcmd { \@maketitle } { \@date }
+          {
+            \tl_if_blank:eTF { \@date } { \skip_vertical:n { -2 \baselineskip } } { \@date }
+            \tl_if_blank:eF { \g__projlib_author_dedicatory_tl }
+              {
+                \tl_if_blank:eT { \@date } { \skip_vertical:n { 2 \baselineskip } }
+                \par
+                \skip_vertical:n { -\parskip }
+                \skip_vertical:n { \baselineskip }
+                \textit{ \g__projlib_author_dedicatory_tl }
+                \tl_if_blank:eT { \@date }
+                  {
+                    \skip_vertical:n { -\parskip }
+                    \skip_vertical:n { \dim_eval:n { -1.7 \baselineskip } }
+                  }
+              }
+          } {} {}
+        \makeatother
+
+        \hook_gput_code:nnn { cmd/maketitle/before } { projlib-author }
+          {
+            \tl_if_blank:eF { \g__projlib_author_keywords_tl }
+              {
+                \projlib_author_pre_thanks:n
+                  {
+                    \group_begin:
+                      \g_projlib_author_keywordsname_style_tl
+                      \keywordsname .
+                    \group_end:
+                    \c_space_tl
+                    \g__projlib_author_keywords_tl
+                  }
+              }
+          }
+
+        \hook_gput_code:nnn { cmd/maketitle/after } { projlib-author }
+          {
+            \bool_if:NT \g__projlib_author_abstract_before_maketitle_bool
+              {
+                \projlib_author_backup_abstract:
+                  \getstored{projlib-author-abstract}
+                \projlib_author_backup_endabstract:
+              }
+            \cs_undefine:N \address
+            \cs_undefine:N \curraddr
+            \cs_undefine:N \email
+            \cs_undefine:N \dedicatory
+            \cs_undefine:N \keywords
+            \bool_gset_true:N \g__projlib_author_already_maketitle_bool
+          }
+      }
+
+      \tl_new:N \l_projlib_author_subjclassname_tl
+      \tl_new:N \l_projlib_author_subjclass_tl
+      \msg_new:nnn { projlib-author }
+        { unknown-msc-edition }
+        { Unknown~edition~(#1)~of~Mathematics~Subject~Classification;~using~'2020' }
+      \NewDocumentCommand \subjclass { O{2020} m }
+        {
+          \tl_set:Nn \l_projlib_author_subjclass_tl { #2 }
+          \tl_if_exist:cTF { subjclassname_#1 }
+            {
+              \tl_set:Nn \l_projlib_author_subjclassname_tl { \tl_use:c { subjclassname_#1 } }
+            }
+            {
+              \msg_warning:nnn { projlib-author } { unknown-msc-edition } { #1 }
+              \tl_set:Nn \l_projlib_author_subjclassname_tl { \tl_use:c { subjclassname_2020 } }
+            }
+          \projlib_author_pre_thanks:n
+            {
+              \textit{ \l_projlib_author_subjclassname_tl . }
+              \enspace
+              \l_projlib_author_subjclass_tl .
+            }
+        }
+      \tl_const:cn { subjclassname_1991 } { \textup{1991}~Mathematics~Subject~Classification }
+      \tl_const:cn { subjclassname_2000 } { \textup{2000}~Mathematics~Subject~Classification }
+      \tl_const:cn { subjclassname_2010 } { \textup{2010}~Mathematics~Subject~Classification }
+      \tl_const:cn { subjclassname_2020 } { \textup{2020}~Mathematics~Subject~Classification }
+  }
+%</projlib-author>
+%
+%<*projlib-datetime>
+\tl_new:N   \g__projlib_datetime_input_format_tl
+\tl_gset:Nn \g__projlib_datetime_input_format_tl { year-month-day }
+
+\keys_define:nn { projlib-datetime }
+  {
+    , plain           .bool_set:N   = \l__projlib_datetime_plain_bool
+    , plain           .initial:n    = { false }
+    , year-month-day  .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+    , month-day-year  .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { month-day-year } }
+    , day-month-year  .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+    , year-month      .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+    , month-day       .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+    , month-year      .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+    , day-month       .code:n       = { \tl_gset:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+    , unknown         .code:n       = {}
+  }
+\ProcessKeysOptions { projlib-datetime }
+
+\bool_if:NT \l__projlib_datetime_plain_bool
+  {
+    \hook_gput_code:nnn { begindocument/before } { projlib-datetime }
+      {
+        \cs_set:Nn \projlib_datetime_text_superscript:n { #1 }
+      }
+  }
+
+\tl_new:N \l__projlib_datetime_output_format_tl
+\keys_define:nn { projlib-datetime-command }
+  {
+    , year-month-day  .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+    , month-day-year  .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { month-day-year } }
+    , day-month-year  .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+    , year-month      .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+    , month-day       .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+    , month-year      .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+    , day-month       .code:n       = { \tl_set:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+    , only-year-month .code:n       = { \tl_set:Nn \l__projlib_datetime_output_format_tl { only-year-month } }
+    , only-month-day  .code:n        = { \tl_set:Nn \l__projlib_datetime_output_format_tl { only-month-day } }
+    , only-year       .code:n        = { \tl_set:Nn \l__projlib_datetime_output_format_tl { only-year } }
+    , only-month      .code:n        = { \tl_set:Nn \l__projlib_datetime_output_format_tl { only-month } }
+    , only-day        .code:n        = { \tl_set:Nn \l__projlib_datetime_output_format_tl { only-day } }
+    , unknown         .code:n       = {}
+  }
+
+\msg_new:nnnn { projlib-datetime }
+  { non-supported-date-format }
+  { The~date~format~"#1"~is~not~supported. }
+  { The~only~formats~available~are~"year-month-day",~ "month-day-year"~and~"day-month-year". }
+
+\cs_new:Nn \projlib_datetime_set_input_format:n
+  {
+    \str_case:nnF { #1 }
+      {
+        { year-month-day } { \tl_gset:Nn \g__projlib_datetime_input_format_tl { year-month-day } }
+        { month-day-year } { \tl_gset:Nn \g__projlib_datetime_input_format_tl { month-day-year } }
+        { day-month-year } { \tl_gset:Nn \g__projlib_datetime_input_format_tl { day-month-year } }
+      }
+      {
+        \msg_error:nnn  { projlib-datetime } { non-supported-date-format } { #1 }
+      }
+  }
+
+\NewDocumentCommand \ProjLibSetDatetimeInputFormat { m }
+  {
+    \projlib_datetime_set_input_format:n { #1 }
+  }
+
+
+\seq_new:N \l__projlib_datetime_date_seq
+
+\cs_new_protected:Nn \projlib_datetime_text_superscript:n
+  {
+    \group_begin:
+      \small
+      \textsuperscript { #1 }
+    \group_end:
+  }
+
+
+\cs_new:Nn \__projlib_datetime_today:n
+  {
+    \str_case_e:nnF { \l__projlib_datetime_output_format_tl }
+        {
+          { only-year-month }
+            {
+              \cs_if_exist_use:c { projlib_datetime_display_year_month #1 _ \languagename :nn }
+                { \int_use:N \c_sys_year_int }
+                { \int_use:N \c_sys_month_int }
+            }
+          { only-month-day  }
+            {
+              \cs_if_exist_use:c { projlib_datetime_display_month_day #1 _ \languagename :nn }
+                { \int_use:N \c_sys_month_int }
+                { \int_use:N \c_sys_day_int }
+            }
+          { only-year       }
+            {
+              \cs_if_exist_use:cT { projlib_datetime_display_year #1 _ \languagename :n }
+                {
+                  { \int_use:N \c_sys_year_int }
+                }
+            }
+          { only-month      }
+            {
+              \cs_if_exist_use:cT { projlib_datetime_display_month #1 _ \languagename :n }
+                {
+                  { \int_use:N \c_sys_month_int }
+                }
+            }
+          { only-day        }
+            {
+              \cs_if_exist_use:cT { projlib_datetime_display_day #1 _ \languagename :n }
+                {
+                  { \int_use:N \c_sys_day_int }
+                }
+            }
+        }
+        {
+          \cs_if_exist_use:c { projlib_datetime_display_year_month_day #1 _ \languagename :nnn }
+            { \int_use:N \c_sys_year_int }
+            { \int_use:N \c_sys_month_int }
+            { \int_use:N \c_sys_day_int }
+        }
+  }
+
+\NewDocumentCommand \ProjLibtoday { O{} }
+  {
+    \group_begin:
+      \keys_set:nn { projlib-datetime-command } { #1 }
+      \__projlib_datetime_today:n {}
+    \group_end:
+  }
+
+\NewDocumentCommand \ProjLibToday { O{} }
+  {
+    \group_begin:
+      \keys_set:nn { projlib-datetime-command } { #1 }
+      \__projlib_datetime_today:n { _uppercase }
+    \group_end:
+  }
+
+
+\cs_new_protected:Nn \projlib_datetime_display_year_month_day:n
+  {
+    \__projlib_datetime_display_year_month_day:en { #1 } {}
+  }
+
+\cs_new_protected:Nn \projlib_datetime_display_year_month_day_uppercase:n
+  {
+    \__projlib_datetime_display_year_month_day:en { #1 } { _uppercase }
+  }
+
+\cs_new_protected:Nn \__projlib_datetime_display_year_month_day:nn
+  {
+    \regex_match:nnTF { \A \d{4}-\d{1,2}-\d{1,2} \Z } { #1 }
+      {
+        \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+        \cs_if_exist_use:c { projlib_datetime_display_year_month_day #2 _ \languagename :nnn }
+          { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % year
+          { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % month
+          { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 3 } } } % day
+      }
+      {
+        \regex_match:nnTF { \A \d{4}-\d{1,2} \Z } { #1 }
+          {
+            \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+            \cs_if_exist_use:c { projlib_datetime_display_year_month #2 _ \languagename :nn }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % year
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % month
+          }
+          {
+            \regex_match:nnTF { \A \d{1,2}-\d{1,2} \Z } { #1 }
+              {
+                \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+                \cs_if_exist_use:c { projlib_datetime_display_month_day #2 _ \languagename :nn }
+                  { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % month
+                  { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % day
+              }
+              {
+                #1
+              }
+          }
+      }
+  }
+\cs_generate_variant:Nn \__projlib_datetime_display_year_month_day:nn { en }
+
+
+\cs_new_protected:Nn \projlib_datetime_display_month_day_year:n
+{
+  \__projlib_datetime_display_month_day_year:en { #1 } {}
+}
+
+\cs_new_protected:Nn \projlib_datetime_display_month_day_year_uppercase:n
+{
+  \__projlib_datetime_display_month_day_year:en { #1 } { _uppercase }
+}
+
+\cs_new_protected:Nn \__projlib_datetime_display_month_day_year:nn
+{
+  \regex_match:nnTF { \A \d{1,2}-\d{1,2}-\d{4} \Z } { #1 }
+    {
+      \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+      \cs_if_exist_use:c { projlib_datetime_display_month_day_year #2 _ \languagename :nnn }
+        { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 3 } } } % year
+        { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % month
+        { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % day
+    }
+    {
+      \regex_match:nnTF { \A \d{1,2}-\d{4} \Z } { #1 }
+        {
+          \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+          \cs_if_exist_use:c { projlib_datetime_display_year_month #2 _ \languagename :nn }
+            { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % year
+            { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % month
+        }
+        {
+          \regex_match:nnTF { \A \d{1,2}-\d{1,2} \Z } { #1 }
+            {
+              \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+              \cs_if_exist_use:c { projlib_datetime_display_month_day #2 _ \languagename :nn }
+                { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % month
+                { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % day
+            }
+            {
+              #1
+            }
+        }
+    }
+}
+\cs_generate_variant:Nn \__projlib_datetime_display_month_day_year:nn { en }
+
+
+\cs_new_protected:Nn \projlib_datetime_display_day_month_year:n
+{
+  \__projlib_datetime_display_day_month_year:en { #1 } {}
+}
+
+\cs_new_protected:Nn \projlib_datetime_display_day_month_year_uppercase:n
+{
+  \__projlib_datetime_display_day_month_year:en { #1 } { _uppercase }
+}
+
+\cs_new_protected:Nn \__projlib_datetime_display_day_month_year:nn
+{
+  \regex_match:nnTF { \A \d{1,2}-\d{1,2}-\d{4} \Z } { #1 }
+    {
+      \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+      \cs_if_exist_use:c { projlib_datetime_display_day_month_year #2 _ \languagename :nnn }
+        { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 3 } } } % year
+        { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % month
+        { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % day
+    }
+    {
+      \regex_match:nnTF { \A \d{1,2}-\d{4} \Z } { #1 }
+        {
+          \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+          \cs_if_exist_use:c { projlib_datetime_display_year_month #2 _ \languagename :nn }
+            { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % year
+            { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % month
+        }
+        {
+          \regex_match:nnTF { \A \d{1,2}-\d{1,2} \Z } { #1 }
+            {
+              \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+              \cs_if_exist_use:c { projlib_datetime_display_month_day #2 _ \languagename :nn }
+                { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } } % month
+                { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } } % day
+            }
+            {
+              #1
+            }
+        }
+    }
+}
+\cs_generate_variant:Nn \__projlib_datetime_display_day_month_year:nn { en }
+
+
+\cs_new_protected:Nn \__projlib_datetime_date_parse_year_month_day:n
+  {
+    \regex_match:nnTF { \A \d{4}-\d{1,2}(|-\d{1,2}) \Z } { #1 }
+      {
+        \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+      }
+      {
+        \regex_match:nnT { \A \d{1,2}-\d{1,2} \Z } { #1 }
+          {
+            \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+            \seq_put_left:Nn \l__projlib_datetime_date_seq {}
+          }
+      }
+  }
+
+\cs_new_protected:Nn \__projlib_datetime_date_parse_month_day_year:n
+  {
+    \regex_match:nnTF { \A \d{1,2}(|-\d{1,2})-\d{4} \Z } { #1 }
+      {
+        \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+        \seq_pop_right:NN \l__projlib_datetime_date_seq \l_tmpa_tl
+        \seq_put_left:NV \l__projlib_datetime_date_seq \l_tmpa_tl
+      }
+      {
+        \regex_match:nnT { \A \d{1,2}-\d{1,2} \Z } { #1 }
+          {
+            \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+            \seq_put_left:Nn \l__projlib_datetime_date_seq {}
+          }
+      }
+  }
+
+\cs_new_protected:Nn \__projlib_datetime_date_parse_day_month_year:n
+  {
+    \regex_match:nnTF { \A \d{1,2}(|-\d{1,2})-\d{4} \Z } { #1 }
+      {
+        \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+        \seq_reverse:N \l__projlib_datetime_date_seq
+      }
+      {
+        \regex_match:nnT { \A \d{1,2}-\d{1,2} \Z } { #1 }
+          {
+            \seq_set_split:Nnn \l__projlib_datetime_date_seq { - } { #1 }
+            \seq_reverse:N \l__projlib_datetime_date_seq
+            \seq_put_left:Nn \l__projlib_datetime_date_seq {}
+          }
+      }
+  }
+
+\cs_new:Nn \__projlib_datetime_input_format_to_str:
+  {
+    \str_case_e:nn { \g__projlib_datetime_input_format_tl }
+      {
+        { year-month-day } { year_month_day }
+        { month-day-year } { month_day_year }
+        { day-month-year } { day_month_year }
+      }
+  }
+
+\cs_new_protected:Nn \__projlib_datetime_display_date_according_to_format:nn
+  {
+    \cs_if_exist_use:c { __projlib_datetime_date_parse_ \__projlib_datetime_input_format_to_str: :n } { #1 }
+    \str_case_e:nnF { \l__projlib_datetime_output_format_tl }
+      {
+        { only-year-month }
+          {
+            \cs_if_exist_use:c { projlib_datetime_display_year_month #2 _ \languagename :nn }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } }
+          }
+        { only-month-day  }
+          {
+            \cs_if_exist_use:c { projlib_datetime_display_month_day #2 _ \languagename :nn }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 3 } } }
+          }
+        { only-year       }
+          {
+            \cs_if_exist_use:c { projlib_datetime_display_year #2 _ \languagename :n }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } }
+          }
+        { only-month      }
+          {
+            \cs_if_exist_use:c { projlib_datetime_display_month #2 _ \languagename :n }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } }
+          }
+        { only-day        }
+          {
+            \cs_if_exist_use:c { projlib_datetime_display_day #2 _ \languagename :n }
+              { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 3 } } }
+          }
+      }
+      {
+        \cs_if_exist_use:c { projlib_datetime_display_ \__projlib_datetime_input_format_to_str: #2 :n } { #1 }
+      }
+  }
+
+\NewDocumentCommand \ProjLibdate { O{} m O{} }
+  {
+    \group_begin:
+      \tl_if_blank:eF { #1 } { \keys_set:nn { projlib-datetime-command } { #1 } }
+      \tl_if_blank:eF { #3 } { \keys_set:nn { projlib-datetime-command } { #3 } }
+      \tl_set:Nx \l_tmpa_tl { #2 }
+      \regex_replace_all:nnN { \D } { - } \l_tmpa_tl
+      \exp_args:Ne \__projlib_datetime_display_date_according_to_format:nn { \l_tmpa_tl } {}
+    \group_end:
+  }
+
+  \NewDocumentCommand \ProjLibDate { O{} m O{} }
+  {
+    \group_begin:
+      \tl_if_blank:eF { #1 } { \keys_set:nn { projlib-datetime-command } { #1 } }
+      \tl_if_blank:eF { #3 } { \keys_set:nn { projlib-datetime-command } { #3 } }
+      \tl_set:Nx \l_tmpa_tl { #2 }
+      \regex_replace_all:nnN { \D } { - } \l_tmpa_tl
+      \exp_args:Ne \__projlib_datetime_display_date_according_to_format:nn { \l_tmpa_tl } { _uppercase }
+    \group_end:
+  }
+
+\ProvideDocumentCommand \Thedate {} { \ProjLibdate }
+\ProvideDocumentCommand \TheDate {} { \ProjLibDate }
+
+
+\int_new:N \l__projlib_datetime_day_of_week_day_int
+\int_new:N \l__projlib_datetime_day_of_week_month_int
+\int_new:N \l__projlib_datetime_day_of_week_year_int
+\int_new:N \l__projlib_datetime_day_of_week_century_int
+\int_new:N \l__projlib_datetime_day_of_week_result_int
+\cs_new:Nn \__projlib_datetime_calculate_day_of_week_with_year_month_day:nnn
+  {
+    \int_set:Nn \l__projlib_datetime_day_of_week_day_int { #3 }
+    \int_compare:nNnTF { #2 } < { 3 }
+      {
+        \int_set:Nn \l__projlib_datetime_day_of_week_year_int { \int_eval:n { #1 - 1 } }
+      }
+      {
+        \int_set:Nn \l__projlib_datetime_day_of_week_year_int { #1 }
+      }
+    \int_set:Nn \l__projlib_datetime_day_of_week_century_int { \int_eval:n { \l__projlib_datetime_day_of_week_year_int / 100 } }
+    \int_set:Nn \l__projlib_datetime_day_of_week_year_int { \int_mod:nn { \l__projlib_datetime_day_of_week_year_int } { 100 } }
+    \int_set:Nn \l__projlib_datetime_day_of_week_month_int
+      {
+        \int_case:nnF { #2 }
+          {
+            {  1 } { 0 }
+            {  2 } { 3 }
+            {  3 } { 2 }
+            {  4 } { 5 }
+            {  5 } { 0 }
+            {  6 } { 3 }
+            {  7 } { 5 }
+            {  8 } { 1 }
+            {  9 } { 4 }
+            { 10 } { 6 }
+            { 11 } { 2 }
+            { 12 } { 4 }
+          }        { 0 }
+      }
+    \int_set:Nn \l__projlib_datetime_day_of_week_result_int
+      {
+        \int_eval:n
+          {
+              \l__projlib_datetime_day_of_week_day_int
+            + \l__projlib_datetime_day_of_week_month_int
+            +\l__projlib_datetime_day_of_week_year_int
+            + \int_div_truncate:nn { \l__projlib_datetime_day_of_week_year_int } { 4 }
+            + \int_div_truncate:nn { \l__projlib_datetime_day_of_week_century_int } { 4 }
+            - 2 * \l__projlib_datetime_day_of_week_century_int
+          }
+      }
+    \int_set:Nn \l__projlib_datetime_day_of_week_result_int
+      {
+        \int_mod:nn { \l__projlib_datetime_day_of_week_result_int } { 7 }
+      }
+    \int_compare:nNnT { \l__projlib_datetime_day_of_week_result_int } < { 1 }
+      {
+        \int_set:Nn \l__projlib_datetime_day_of_week_result_int
+          {
+            \int_eval:n { \l__projlib_datetime_day_of_week_result_int + 7 }
+          }
+      }
+  }
+
+
+\cs_new_protected:Nn \projlib_datetime_display_week:n
+  {
+    \__projlib_datetime_display_week_according_to_format:en { #1 } {}
+  }
+
+\cs_new_protected:Nn \projlib_datetime_display_week_uppercase:n
+  {
+    \__projlib_datetime_display_week_according_to_format:en { #1 } { _uppercase }
+  }
+
+\cs_new_protected:Nn \__projlib_datetime_display_week_according_to_format:nn
+  {
+    \projlib_datetime_calculate_week_according_to_format:n { #1 }
+    \cs_if_exist_use:c { projlib_datetime_display_week #2 _ \languagename :n } { \l__projlib_datetime_day_of_week_result_int }
+  }
+\cs_generate_variant:Nn \__projlib_datetime_display_week_according_to_format:nn { en }
+
+
+\cs_new_protected:Nn \projlib_datetime_calculate_week_according_to_format:n
+  {
+    \cs_if_exist_use:c { __projlib_datetime_date_parse_ \__projlib_datetime_input_format_to_str: :n } { #1 }
+    \__projlib_datetime_calculate_day_of_week_with_year_month_day:nnn
+      { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 1 } } }
+      { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 2 } } }
+      { \int_eval:n { \seq_item:Nn \l__projlib_datetime_date_seq { 3 } } }
+  }
+
+
+% For each language, there are 7 groups of functions:
+% 1) \projlib_datetime_display_year_month_day_<languagename>:nnn
+%    \projlib_datetime_display_year_month_day_uppercase_<languagename>:nnn
+% 2) \projlib_datetime_display_year_month_<languagename>:nn
+%    \projlib_datetime_display_year_month_uppercase_<languagename>:nn
+% 3) \projlib_datetime_display_month_day_<languagename>:nn
+%    \projlib_datetime_display_month_day_uppercase_<languagename>:nn
+% 4) \projlib_datetime_display_year_<languagename>:n
+%    \projlib_datetime_display_year_uppercase_<languagename>:n
+% 5) \projlib_datetime_display_month_<languagename>:n
+%    \projlib_datetime_display_month_uppercase_<languagename>:n
+% 6) \projlib_datetime_display_day_<languagename>:n
+%    \projlib_datetime_display_day_uppercase_<languagename>:n
+% 7) \projlib_datetime_display_week_<languagename>:n
+%    \projlib_datetime_display_week_uppercase_<languagename>:n
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_english:nnn
+  {
+    \projlib_datetime_display_month_day_english:nn { #2 } { #3 }
+    ,\nobreakspace
+    \projlib_datetime_display_year_english:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_english:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_english:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_english:nn { #2 } { #3 }
+    ,\nobreakspace
+    \projlib_datetime_display_year_english:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_english:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_english:nn
+  {
+    \projlib_datetime_display_month_english:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_english:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_english:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_english:nn
+  {
+    \projlib_datetime_display_month_uppercase_english:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_english:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_english:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_english:nn
+  {
+    \projlib_datetime_display_month_english:n { #1 }
+    \nobreakspace
+    \projlib_datetime_display_day_english:n { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_english:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_english:nn
+  {
+    \projlib_datetime_display_month_uppercase_english:n { #1 }
+    \nobreakspace
+    \projlib_datetime_display_day_english:n { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_english:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_english:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_english:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_english:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { January   }
+        { 2 }  { February  }
+        { 3 }  { March     }
+        { 4 }  { April     }
+        { 5 }  { May       }
+        { 6 }  { June      }
+        { 7 }  { July      }
+        { 8 }  { August    }
+        { 9 }  { September }
+        { 10 } { October   }
+        { 11 } { November  }
+        { 12 } { December  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_english:n
+  {
+    \projlib_datetime_display_month_english:n { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_english:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_english:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_english:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Monday    }
+        { 2 }  { Tuesday   }
+        { 3 }  { Wednesday }
+        { 4 }  { Thursday  }
+        { 5 }  { Friday    }
+        { 6 }  { Saturday  }
+        { 7 }  { Sunday    }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_english:n
+  {
+    \projlib_datetime_display_week_english:n { #1 }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_french:nnn
+  {
+    \projlib_datetime_display_month_day_french:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_french:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_french:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_french:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_french:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_french:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_french:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_french:nn
+  {
+    \projlib_datetime_display_month_french:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_french:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_french:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_french:nn
+  {
+    \projlib_datetime_display_month_uppercase_french:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_french:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_french:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_french:nn
+  {
+    \projlib_datetime_display_day_french:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_month_french:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_french:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_french:nn
+  {
+    \projlib_datetime_display_month_day_french:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_french:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_french:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_french:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_french:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { janvier   }
+        { 2 }  { février   }
+        { 3 }  { mars      }
+        { 4 }  { avril     }
+        { 5 }  { mai       }
+        { 6 }  { juin      }
+        { 7 }  { juillet   }
+        { 8 }  { août      }
+        { 9 }  { septembre }
+        { 10 } { octobre   }
+        { 11 } { novembre  }
+        { 12 } { décembre  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_french:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Janvier   }
+        { 2 }  { Février   }
+        { 3 }  { Mars      }
+        { 4 }  { Avril     }
+        { 5 }  { Mai       }
+        { 6 }  { Juin      }
+        { 7 }  { Juillet   }
+        { 8 }  { Août      }
+        { 9 }  { Septembre }
+        { 10 } { Octobre   }
+        { 11 } { Novembre  }
+        { 12 } { Décembre  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_french:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 } { 1 \projlib_datetime_text_superscript:n { er } }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_uppercase_french:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 } { 1 \projlib_datetime_text_superscript:n { er } }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_french:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { lundi    }
+        { 2 }  { mardi    }
+        { 3 }  { mercredi }
+        { 4 }  { jeudi    }
+        { 5 }  { vendredi }
+        { 6 }  { samedi   }
+        { 7 }  { dimanche }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_french:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Lundi    }
+        { 2 }  { Mardi    }
+        { 3 }  { Mercredi }
+        { 4 }  { Jeudi    }
+        { 5 }  { Vendredi }
+        { 6 }  { Samedi   }
+        { 7 }  { Dimanche }
+      } { ??? }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_ngerman:nnn
+  {
+    \projlib_datetime_display_month_day_ngerman:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_ngerman:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_ngerman:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_ngerman:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_ngerman:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_ngerman:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_ngerman:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_ngerman:nn
+  {
+    \projlib_datetime_display_month_ngerman:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_ngerman:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_ngerman:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_ngerman:nn
+  {
+    \projlib_datetime_display_month_uppercase_ngerman:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_ngerman:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_ngerman:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_ngerman:nn
+  {
+    \projlib_datetime_display_day_ngerman:n { #2 }
+    .\nobreakspace
+    \projlib_datetime_display_month_ngerman:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_ngerman:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_ngerman:nn
+  {
+    \projlib_datetime_display_month_day_ngerman:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_ngerman:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_ngerman:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_ngerman:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_ngerman:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Januar    }
+        { 2 }  { Februar   }
+        { 3 }  { März      }
+        { 4 }  { April     }
+        { 5 }  { Mai       }
+        { 6 }  { Juni      }
+        { 7 }  { Juli      }
+        { 8 }  { August    }
+        { 9 }  { September }
+        { 10 } { Oktober   }
+        { 11 } { November  }
+        { 12 } { Dezember  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_ngerman:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Januar    }
+        { 2 }  { Februar   }
+        { 3 }  { März      }
+        { 4 }  { April     }
+        { 5 }  { Mai       }
+        { 6 }  { Juni      }
+        { 7 }  { Juli      }
+        { 8 }  { August    }
+        { 9 }  { September }
+        { 10 } { Oktober   }
+        { 11 } { November  }
+        { 12 } { Dezember  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_ngerman:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_ngerman:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_ngerman:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Montag     }
+        { 2 }  { Dienstag   }
+        { 3 }  { Mittwoch   }
+        { 4 }  { Donnerstag }
+        { 5 }  { Freitag    }
+        { 6 }  { Samstag    }
+        { 7 }  { Sonntag    }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_ngerman:n
+  {
+    \projlib_datetime_display_week_ngerman:n { #1 }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_italian:nnn
+  {
+    \projlib_datetime_display_month_day_italian:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_italian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_italian:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_italian:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_italian:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_italian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_italian:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_italian:nn
+  {
+    \projlib_datetime_display_month_italian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_italian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_italian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_italian:nn
+  {
+    \projlib_datetime_display_month_uppercase_italian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_italian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_italian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_italian:nn
+  {
+    \projlib_datetime_display_day_italian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_month_italian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_italian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_italian:nn
+  {
+    \projlib_datetime_display_month_day_italian:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_italian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_italian:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_italian:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_italian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { gennaio   }
+        { 2 }  { febbraio  }
+        { 3 }  { marzo     }
+        { 4 }  { aprile    }
+        { 5 }  { maggio    }
+        { 6 }  { giugno    }
+        { 7 }  { luglio    }
+        { 8 }  { agosto    }
+        { 9 }  { settembre }
+        { 10 } { ottobre   }
+        { 11 } { novembre  }
+        { 12 } { dicembre  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_italian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Gennaio   }
+        { 2 }  { Febbraio  }
+        { 3 }  { Marzo     }
+        { 4 }  { Aprile    }
+        { 5 }  { Maggio    }
+        { 6 }  { Giugno    }
+        { 7 }  { Luglio    }
+        { 8 }  { Agosto    }
+        { 9 }  { Settembre }
+        { 10 } { Ottobre   }
+        { 11 } { Novembre  }
+        { 12 } { Dicembre  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_italian:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_italian:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_italian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { lunedì     }
+        { 2 }  { martedì    }
+        { 3 }  { mercoledì  }
+        { 4 }  { giovedì    }
+        { 5 }  { venerdì    }
+        { 6 }  { sabato     }
+        { 7 }  { domenica   }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_italian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Lunedì     }
+        { 2 }  { Martedì    }
+        { 3 }  { Mercoledì  }
+        { 4 }  { Giovedì    }
+        { 5 }  { Venerdì    }
+        { 6 }  { Sabato     }
+        { 7 }  { Domenica   }
+      } { ??? }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_portuguese:nnn
+  {
+    \projlib_datetime_display_month_day_portuguese:nn { #2 } { #3 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_portuguese:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_portuguese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_portuguese:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_portuguese:nn { #2 } { #3 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_portuguese:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_portuguese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_portuguese:nn
+  {
+    \projlib_datetime_display_month_portuguese:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_portuguese:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_portuguese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_portuguese:nn
+  {
+    \projlib_datetime_display_month_uppercase_portuguese:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_portuguese:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_portuguese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_portuguese:nn
+  {
+    \projlib_datetime_display_day_portuguese:n { #2 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_month_uppercase_portuguese:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_portuguese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_portuguese:nn
+  {
+    \projlib_datetime_display_month_day_portuguese:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_portuguese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_portuguese:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_portuguese:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_portuguese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { janeiro   }
+        { 2 }  { fevereiro }
+        { 3 }  { março     }
+        { 4 }  { abril     }
+        { 5 }  { maio      }
+        { 6 }  { junho     }
+        { 7 }  { julho     }
+        { 8 }  { agosto    }
+        { 9 }  { setembro  }
+        { 10 } { outubro   }
+        { 11 } { novembro  }
+        { 12 } { dezembro  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_portuguese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Janeiro   }
+        { 2 }  { Fevereiro }
+        { 3 }  { Março     }
+        { 4 }  { Abril     }
+        { 5 }  { Maio      }
+        { 6 }  { Junho     }
+        { 7 }  { Julho     }
+        { 8 }  { Agosto    }
+        { 9 }  { Setembro  }
+        { 10 } { Outubro   }
+        { 11 } { Novembro  }
+        { 12 } { Dezembro  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_portuguese:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_portuguese:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_portuguese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { segunda-feira }
+        { 2 }  { terça-feira   }
+        { 3 }  { quarta-feira  }
+        { 4 }  { quinta-feira  }
+        { 5 }  { sexta-feira   }
+        { 6 }  { sábado        }
+        { 7 }  { domingo       }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_portuguese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Segunda-feira }
+        { 2 }  { Terça-feira   }
+        { 3 }  { Quarta-feira  }
+        { 4 }  { Quinta-feira  }
+        { 5 }  { Sexta-feira   }
+        { 6 }  { Sábado        }
+        { 7 }  { Domingo       }
+      } { ??? }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_brazilian:nnn
+  {
+    \projlib_datetime_display_month_day_brazilian:nn { #2 } { #3 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_brazilian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_brazilian:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_brazilian:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_brazilian:nn { #2 } { #3 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_brazilian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_brazilian:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_brazilian:nn
+  {
+    \projlib_datetime_display_month_brazilian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_brazilian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_brazilian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_brazilian:nn
+  {
+    \projlib_datetime_display_month_uppercase_brazilian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_brazilian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_brazilian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_brazilian:nn
+  {
+    \projlib_datetime_display_day_brazilian:n { #2 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_month_uppercase_brazilian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_brazilian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_brazilian:nn
+  {
+    \projlib_datetime_display_month_day_brazilian:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_brazilian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_brazilian:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_brazilian:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_brazilian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { janeiro   }
+        { 2 }  { fevereiro }
+        { 3 }  { março     }
+        { 4 }  { abril     }
+        { 5 }  { maio      }
+        { 6 }  { junho     }
+        { 7 }  { julho     }
+        { 8 }  { agosto    }
+        { 9 }  { setembro  }
+        { 10 } { outubro   }
+        { 11 } { novembro  }
+        { 12 } { dezembro  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_brazilian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Janeiro   }
+        { 2 }  { Fevereiro }
+        { 3 }  { Março     }
+        { 4 }  { Abril     }
+        { 5 }  { Maio      }
+        { 6 }  { Junho     }
+        { 7 }  { Julho     }
+        { 8 }  { Agosto    }
+        { 9 }  { Setembro  }
+        { 10 } { Outubro   }
+        { 11 } { Novembro  }
+        { 12 } { Dezembro  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_brazilian:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_brazilian:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_brazilian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { segunda-feira }
+        { 2 }  { terça-feira   }
+        { 3 }  { quarta-feira  }
+        { 4 }  { quinta-feira  }
+        { 5 }  { sexta-feira   }
+        { 6 }  { sábado        }
+        { 7 }  { domingo       }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_brazilian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Segunda-feira }
+        { 2 }  { Terça-feira   }
+        { 3 }  { Quarta-feira  }
+        { 4 }  { Quinta-feira  }
+        { 5 }  { Sexta-feira   }
+        { 6 }  { Sábado        }
+        { 7 }  { Domingo       }
+      } { ??? }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_spanish:nnn
+  {
+    \projlib_datetime_display_month_day_spanish:nn { #2 } { #3 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_spanish:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_spanish:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_spanish:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_spanish:nn { #2 } { #3 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_spanish:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_spanish:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_spanish:nn
+  {
+    \projlib_datetime_display_month_spanish:n { #2 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_spanish:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_spanish:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_spanish:nn
+  {
+    \projlib_datetime_display_month_uppercase_spanish:n { #2 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_year_spanish:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_spanish:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_spanish:nn
+  {
+    \projlib_datetime_display_day_spanish:n { #2 }
+    \nobreakspace de \nobreakspace
+    \projlib_datetime_display_month_spanish:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_spanish:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_spanish:nn
+  {
+    \projlib_datetime_display_month_day_spanish:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_spanish:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_spanish:n { #1 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_spanish:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_month_spanish:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { enero      }
+        { 2 }  { febrero    }
+        { 3 }  { marzo      }
+        { 4 }  { abril      }
+        { 5 }  { mayo       }
+        { 6 }  { junio      }
+        { 7 }  { julio      }
+        { 8 }  { agosto     }
+        { 9 }  { septiembre }
+        { 10 } { octubre    }
+        { 11 } { noviembre  }
+        { 12 } { diciembre  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_spanish:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Enero      }
+        { 2 }  { Febrero    }
+        { 3 }  { Marzo      }
+        { 4 }  { Abril      }
+        { 5 }  { Mayo       }
+        { 6 }  { Junio      }
+        { 7 }  { Julio      }
+        { 8 }  { Agosto     }
+        { 9 }  { Septiembre }
+        { 10 } { Octubre    }
+        { 11 } { Noviembre  }
+        { 12 } { Diciembre  }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_spanish:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_spanish:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_spanish:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { lunes      }
+        { 2 }  { martes     }
+        { 3 }  { miércoles  }
+        { 4 }  { jueves     }
+        { 5 }  { viernes    }
+        { 6 }  { sábado     }
+        { 7 }  { domingo    }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_spanish:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Lunes      }
+        { 2 }  { Martes     }
+        { 3 }  { Miércoles  }
+        { 4 }  { Jueves     }
+        { 5 }  { Viernes    }
+        { 6 }  { Sábado     }
+        { 7 }  { Domingo    }
+      } { ??? }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_schinese:nnn
+  {
+    #1 年 #2 月 #3 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_schinese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_schinese:nnn
+  {
+    #1 年 #2 月 #3 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_schinese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_schinese:nn
+  {
+    #1 年 #2 月
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_schinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_schinese:nn
+  {
+    #1 年 #2 月
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_schinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_schinese:nn
+  {
+    #1 月 #2 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_schinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_schinese:nn
+  {
+    #1 月 #2 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_schinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_schinese:n { #1 年 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_schinese:n { #1 年 }
+\cs_new:Nn \projlib_datetime_display_month_schinese:n { #1 月 }
+\cs_new:Nn \projlib_datetime_display_month_uppercase_schinese:n { #1 月 }
+\cs_new:Nn \projlib_datetime_display_day_schinese:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_schinese:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_schinese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { 星期一    }
+        { 2 }  { 星期二    }
+        { 3 }  { 星期三    }
+        { 4 }  { 星期四    }
+        { 5 }  { 星期五    }
+        { 6 }  { 星期六    }
+        { 7 }  { 星期日    }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_schinese:n
+  {
+    \projlib_datetime_display_week_schinese:n { #1 }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_tchinese:nnn
+  {
+    #1 年 #2 月 #3 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_tchinese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_tchinese:nnn
+  {
+    #1 年 #2 月 #3 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_tchinese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_tchinese:nn
+  {
+    #1 年 #2 月
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_tchinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_tchinese:nn
+  {
+    #1 年 #2 月
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_tchinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_tchinese:nn
+  {
+    #1 月 #2 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_tchinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_tchinese:nn
+  {
+    #1 月 #2 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_tchinese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_tchinese:n { #1 年 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_tchinese:n { #1 年 }
+\cs_new:Nn \projlib_datetime_display_month_tchinese:n { #1 月 }
+\cs_new:Nn \projlib_datetime_display_month_uppercase_tchinese:n { #1 月 }
+\cs_new:Nn \projlib_datetime_display_day_tchinese:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_tchinese:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_tchinese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { 星期一    }
+        { 2 }  { 星期二    }
+        { 3 }  { 星期三    }
+        { 4 }  { 星期四    }
+        { 5 }  { 星期五    }
+        { 6 }  { 星期六    }
+        { 7 }  { 星期日    }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_tchinese:n
+  {
+    \projlib_datetime_display_week_tchinese:n { #1 }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_japanese:nnn
+  {
+    #1 年 #2 月 #3 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_japanese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_japanese:nnn
+  {
+    #1 年 #2 月 #3 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_japanese:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_japanese:nn
+  {
+    #1 年 #2 月
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_japanese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_japanese:nn
+  {
+    #1 年 #2 月
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_japanese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_japanese:nn
+  {
+    #1 月 #2 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_japanese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_japanese:nn
+  {
+    #1 月 #2 日
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_japanese:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_japanese:n { #1 年 }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_japanese:n { #1 年 }
+\cs_new:Nn \projlib_datetime_display_month_japanese:n { #1 月 }
+\cs_new:Nn \projlib_datetime_display_month_uppercase_japanese:n { #1 月 }
+\cs_new:Nn \projlib_datetime_display_day_japanese:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_japanese:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_japanese:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { 月曜日    }
+        { 2 }  { 火曜日    }
+        { 3 }  { 水曜日    }
+        { 4 }  { 木曜日    }
+        { 5 }  { 金曜日    }
+        { 6 }  { 土曜日    }
+        { 7 }  { 日曜日    }
+      } { ??? }
+  }
+
+\cs_new:Nn \projlib_datetime_display_week_uppercase_japanese:n
+  {
+    \projlib_datetime_display_week_japanese:n { #1 }
+  }
+
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_russian:nnn
+  {
+    \projlib_datetime_display_month_day_russian:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_russian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_russian:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_day_uppercase_russian:nnn
+  {
+    \projlib_datetime_display_month_day_uppercase_russian:nn { #2 } { #3 }
+    \nobreakspace
+    \projlib_datetime_display_year_russian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_day_uppercase_russian:nnn { VVV, eee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_russian:nn
+  {
+    \projlib_datetime_display_month_russian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_russian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_russian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_month_uppercase_russian:nn
+  {
+    \projlib_datetime_display_month_uppercase_russian:n { #2 }
+    \nobreakspace
+    \projlib_datetime_display_year_russian:n { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_year_month_uppercase_russian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_russian:nn
+  {
+    \projlib_datetime_display_day_russian:n { #2 }
+    \nobreakspace
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { января    }
+        { 2 }  { февраля   }
+        { 3 }  { марта     }
+        { 4 }  { апреля    }
+        { 5 }  { мая       }
+        { 6 }  { июня      }
+        { 7 }  { июля      }
+        { 8 }  { августа   }
+        { 9 }  { сентября  }
+        { 10 } { октября   }
+        { 11 } { ноября    }
+        { 12 } { декабря   }
+      } { #1 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_russian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_month_day_uppercase_russian:nn
+  {
+    \projlib_datetime_display_month_day_russian:nn { #1 } { #2 }
+  }
+\cs_generate_variant:Nn \projlib_datetime_display_month_day_uppercase_russian:nn { VV, ee }
+
+\cs_new:Nn \projlib_datetime_display_year_russian:n { #1 ~ г. }
+\cs_new:Nn \projlib_datetime_display_year_uppercase_russian:n { #1 ~ г. }
+
+\cs_new:Nn \projlib_datetime_display_month_russian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { январь    }
+        { 2 }  { февраль   }
+        { 3 }  { март      }
+        { 4 }  { апрель    }
+        { 5 }  { май       }
+        { 6 }  { июнь      }
+        { 7 }  { июль      }
+        { 8 }  { август    }
+        { 9 }  { сентябрь  }
+        { 10 } { октябрь   }
+        { 11 } { ноябрь    }
+        { 12 } { декабрь   }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_month_uppercase_russian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Январь    }
+        { 2 }  { Февраль   }
+        { 3 }  { Март      }
+        { 4 }  { Апрель    }
+        { 5 }  { Май       }
+        { 6 }  { Июнь      }
+        { 7 }  { Июль      }
+        { 8 }  { Август    }
+        { 9 }  { Сентябрь  }
+        { 10 } { Октябрь   }
+        { 11 } { Ноябрь    }
+        { 12 } { Декабрь   }
+      } { #1 }
+  }
+
+\cs_new:Nn \projlib_datetime_display_day_russian:n { #1 }
+\cs_new:Nn \projlib_datetime_display_day_uppercase_russian:n { #1 }
+
+\cs_new:Nn \projlib_datetime_display_week_russian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { понедельник }
+        { 2 }  { вторник     }
+        { 3 }  { среда       }
+        { 4 }  { четверг     }
+        { 5 }  { пятница     }
+        { 6 }  { суббота     }
+        { 7 }  { воскресенье }
+      } { ??? }
+  }
+\cs_new:Nn \projlib_datetime_display_week_uppercase_russian:n
+  {
+    \int_case:nnF { #1 }
+      {
+        { 1 }  { Понедельник }
+        { 2 }  { Вторник     }
+        { 3 }  { Среда       }
+        { 4 }  { Четверг     }
+        { 5 }  { Пятница     }
+        { 6 }  { Суббота     }
+        { 7 }  { Воскресенье }
+      } { ??? }
+  }
+%</projlib-datetime>
+%
+%<*projlib-draft>
+\keys_define:nn { projlib-draft }
+  {
+    , draft   .bool_set:N   = \l__projlib_draft_fast_bool
+    , draft   .initial:n    = { false }
+    , fast    .bool_set:N   = \l__projlib_draft_fast_bool
+    , unknown .code:n       = {}
+  }
+\ProcessKeysOptions { projlib-draft }
+
+\RequirePackage { projlib-language }
+\RequirePackage { xcolor }
+
+\bool_if:NTF \l__projlib_draft_fast_bool
+  {
+    \NewDocumentCommand \projlib_draft_plain_box { O{-paper} m }
+      {
+        \group_begin:
+          \color { #1 }
+          \dim_set:Nn \fboxsep  { 1.5pt }
+          \dim_set:Nn \fboxrule { 1.5pt }
+          \fbox { #2 }
+        \group_end:
+      }
+  }
+  {
+    \PassOptionsToPackage { many } { tcolorbox }
+    \RequirePackage { tcolorbox }
+    \NewTCBox \projlib_draft_plain_box { O{-paper} }
+      {
+        enhanced~jigsaw, breakable,
+        on~line, arc = 1.2pt, outer~arc = 1pt,
+        colframe = #1, colupper = #1, opacityback = 0,
+        boxsep = 1pt, boxrule = 1.2pt,
+        left = 1pt, right = 1pt, top = 0pt, bottom = 0pt,
+      }
+  }
+
+\projlib_langauge_define_multilingual_text:Nn \__dnf_text
+  {
+    EN = To\ be\ finished     ,
+    FR = Pas\ encore\ fini    ,
+    DE = Nicht\ beendet       ,
+    IT = Per\ essere\ finito  ,
+    PT = Não\ terminou        ,
+    BR = Não\ terminou        ,
+    ES = Estar\ terminado     ,
+    CN = 这里尚未完成         ,
+    TC = 這裡尚未完成         ,
+    JP = 終わってない         ,
+    RU = Не\ закончен         ,
+  }
+
+\projlib_langauge_define_multilingual_text:Nn \__dnf_report_text
+  {
+    EN = { Below\ is\ a\ list\ of\ outstanding\ items,
+           \ followed\ by\ the\ corresponding\ page\ numbers.         }     ,
+    FR = { Voici\ la\ liste\ des\ éléments\ en\ suspens,
+           \ suivie\ des\ numéros\ de\ page\ correspondants.          }     ,
+    DE = { Unten\ ist\ eine\ Liste\ der\ ausstehenden\ Posten,
+           \ gefolgt\ von\ den\ entsprechenden\ Seitenzahlen.         }     ,
+    IT = { Qui\ sotto\ c'è\ una\ lista\ di\ voci\ in\ sospeso,
+           \ seguita\ dai\ numeri\ di\ pagina\ corrispondenti.        }     ,
+    PT = { Abaixo\ está\ uma\ lista\ de\ itens\ pendentes,
+           \ seguida\ dos\ números\ de\ página\ correspondentes.      }     ,
+    BR = { Abaixo\ está\ uma\ lista\ de\ itens\ pendentes,
+           \ seguida\ dos\ números\ de\ página\ correspondentes.      }     ,
+    ES = { Aquí está\ la\ lista\ de\ elementos\ pendientes,
+           \ seguida\ de\ los\ números\ de\ página\ correspondientes. }     ,
+    CN = { 以下是未完成事项列表，括号内注明了对应的页码。             }     ,
+    TC = { 以下是未完成事項的列表，括號內註明了對應頁碼。             }     ,
+    JP = { 以下は、未解決の項目とそれに対応するページ番号の一覧です。 }     ,
+    RU = { Ниже\ приведен\ список\ невыполненных\ пунктов
+           \ с\ соответствующими\ номерами\ страниц\ в\ скобках.      }     ,
+  }
+
+\tl_new:c    { __dnf_font }
+\tl_gset:cn  { __dnf_font }        { \normalfont \ttfamily \bfseries \small }
+
+\definecolor { __dnf_color }       { RGB } {  21, 122,  20 }
+
+\newcounter  { __dnf_counter }
+
+\tl_new:N \g__projlib_draft_dnf_report_tl
+
+\NewDocumentCommand \dnf { d<> }
+  {
+    \noindent
+    \projlib_draft_plain_box [ __dnf_color ]
+      {
+        \stepcounter { __dnf_counter }
+        \__dnf_font
+        \__dnf_text
+        \c_space_tl
+        \# \the__dnf_counter
+        \IfNoValueF { #1 } { \, : ~ #1 }
+        \tl_gput_right:Nx \g__projlib_draft_dnf_report_tl
+          {
+            \# \,
+            \int_value:w \the__dnf_counter
+            \c_space_tl \c_space_tl
+            $\langle$
+            \skip_horizontal:n { 0.1em }
+            \cs_if_exist:cTF { hyperlink }
+              {
+                \exp_not:N \hyperlink { page.\thepage } { \thepage }
+              }
+              {
+                \thepage
+              }
+            \skip_horizontal:n { 0.1em }
+            $\rangle$
+            \c_space_tl
+            \IfNoValueF { #1 } { : ~ #1 }
+            \\
+          }
+      }
+  }
+
+\hook_gput_code:nnn { enddocument } { projlib-draft }
+  {
+    \tl_if_blank:VF \g__projlib_draft_dnf_report_tl
+      {
+        \clearpage \noindent
+        \color { __dnf_color }
+        \__dnf_font
+        \__dnf_report_text \\[0.75\baselineskip]
+        \g__projlib_draft_dnf_report_tl
+      }
+  }
+%</projlib-draft>
+%
+%<*projlib-font>
+\keys_define:nn { projlib-font }
+  {
+    , useosf           .bool_set:N   = \l__projlib_font_useosf_bool
+    , useosf           .initial:n    = { false }
+    , old-style-figures.bool_set:N   = \l__projlib_font_useosf_bool
+    , old~style~figures.bool_set:N   = \l__projlib_font_useosf_bool
+    , old style figures.bool_set:N   = \l__projlib_font_useosf_bool
+    , lmodern          .bool_set:N   = \l__projlib_font_lmodern_bool
+    , lmodern          .initial:n    = { false }
+    , latin-modern     .bool_set:N   = \l__projlib_font_lmodern_bool
+    , latin~modern     .bool_set:N   = \l__projlib_font_lmodern_bool
+    , latin modern     .bool_set:N   = \l__projlib_font_lmodern_bool
+    , palatino         .bool_set:N   = \l__projlib_font_palatino_bool
+    , palatino         .initial:n    = { false }
+    , times            .bool_set:N   = \l__projlib_font_times_bool
+    , times            .initial:n    = { false }
+    , garamond         .bool_set:N   = \l__projlib_font_garamond_bool
+    , garamond         .initial:n    = { false }
+    , noto             .bool_set:N   = \l__projlib_font_noto_bool
+    , noto             .initial:n    = { false }
+    , biolinum         .bool_set:N   = \l__projlib_font_biolinum_bool
+    , biolinum         .initial:n    = { false }
+    , unknown          .code:n       = {}
+  }
+\ProcessKeysOptions { projlib-font }
+
+\bool_new:N \g_projlib_font_already_set_bool
+\bool_gset_false:N \g_projlib_font_already_set_bool
+
+\RequirePackage { setspace }
+
+\cs_new:Nn \projlib_font_set_linespacing_latin:n
+  {
+    \cs_if_exist:NTF \projlib_language_set_linespacing_latin:n
+      {
+        \projlib_language_set_linespacing_latin:n { #1 }
+      }
+      {
+        #1
+      }
+  }
+
+\bool_if:NT \l__projlib_font_lmodern_bool
+  {
+    \RequirePackage { amssymb }
+    \bool_if:NTF \l__projlib_font_useosf_bool
+      {
+        \RequirePackage { cfr-lm }
+      }
+      {
+        \RequirePackage { lmodern }
+      }
+    \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
+  }
+
+\bool_if:NT \l__projlib_font_palatino_bool
+  {
+    \sys_if_engine_pdftex:TF
+    {
+      \RequirePackage { mathpazo }
+      \PassOptionsToPackage { defaultsups } { newpxtext }
+      \RequirePackage { newpxtext }
+      \cs_undefine:c { openbox }
+      \bool_if:NT \l__projlib_font_useosf_bool { \useosf }
+    }
+    {
+      \PassOptionsToPackage { warnings-off = { mathtools-colon, mathtools-overbracket } } { unicode-math }
+      \RequirePackage { unicode-math }
+      \defaultfontfeatures{ Scale=MatchLowercase, Ligatures=TeX }
+      \bool_if:NTF \l__projlib_font_useosf_bool
+        {
+          \setmainfont { TeXGyrePagellaX-Regular.otf }
+            [
+              BoldFont       = TeXGyrePagellaX-Bold.otf ,
+              ItalicFont     = TeXGyrePagellaX-Italic.otf ,
+              BoldItalicFont = TeXGyrePagellaX-BoldItalic.otf,
+              Numbers        = OldStyle ]
+        }
+        {
+          \setmainfont { TeXGyrePagellaX-Regular.otf }
+            [
+              BoldFont       = TeXGyrePagellaX-Bold.otf ,
+              ItalicFont     = TeXGyrePagellaX-Italic.otf ,
+              BoldItalicFont = TeXGyrePagellaX-BoldItalic.otf,
+            ]
+        }
+      \setmathfont { texgyrepagella-math.otf }
+    }
+    \projlib_font_set_linespacing_latin:n { \setstretch { 1.07 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
+  }
+
+\bool_if:NT \l__projlib_font_times_bool
+  {
+    \sys_if_engine_pdftex:TF
+      {
+        \PassOptionsToPackage { defaultsups } { newtxtext }
+        \RequirePackage { newtxtext }
+        \RequirePackage { newtxmath }
+        \cs_undefine:c { openbox }
+        \bool_if:NT \l__projlib_font_useosf_bool { \useosf }
+      }
+      {
+        \PassOptionsToPackage { warnings-off = { mathtools-colon, mathtools-overbracket } } { unicode-math }
+        \RequirePackage { unicode-math }
+        \defaultfontfeatures{ Scale=MatchLowercase, Ligatures=TeX }
+        \bool_if:NTF \l__projlib_font_useosf_bool
+          {
+            \setmainfont { TeXGyreTermesX-Regular.otf }
+              [
+                BoldFont       = TeXGyreTermesX-Bold.otf ,
+                ItalicFont     = TeXGyreTermesX-Italic.otf ,
+                BoldItalicFont = TeXGyreTermesX-BoldItalic.otf,
+                Numbers        = OldStyle ]
+          }
+          {
+            \setmainfont { TeXGyreTermesX-Regular.otf }
+              [
+                BoldFont       = TeXGyreTermesX-Bold.otf ,
+                ItalicFont     = TeXGyreTermesX-Italic.otf ,
+                BoldItalicFont = TeXGyreTermesX-BoldItalic.otf,
+              ]
+          }
+        \setmathfont { texgyretermes-math.otf }
+      }
+    \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
+  }
+
+\bool_if:NT \l__projlib_font_garamond_bool
+  {
+    \bool_if:NF \l__projlib_font_useosf_bool
+      {
+        \PassOptionsToPackage { lining } { ebgaramond }
+      }
+    \RequirePackage [ cmintegrals, cmbraces ] { newtxmath }
+    \cs_undefine:c { openbox }
+    \RequirePackage { ebgaramond-maths }
+    \RequirePackage { ebgaramond }
+    \cs_undefine:c { Bbbk }
+    \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
+  }
+
+\bool_if:NT \l__projlib_font_noto_bool
+  {
+    \bool_if:NT \l__projlib_font_useosf_bool
+      {
+        \PassOptionsToPackage { oldstyle } { notomath }
+      }
+    \RequirePackage { anyfontsize }
+    \RequirePackage { notomath }
+    \cs_undefine:c { Bbbk }
+    \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
+  }
+
+\bool_if:NT \l__projlib_font_biolinum_bool
+  {
+    \RequirePackage [ OT1 ] { eulervm }
+    \sys_if_engine_pdftex:TF
+      {
+        \bool_if:NT \l__projlib_font_useosf_bool
+          {
+            \PassOptionsToPackage { osf } { biolinum }
+          }
+          \RequirePackage { biolinum }
+          \tl_gset:Nn \familydefault { \biolinum@family }
+      }
+      {
+        \PassOptionsToPackage { no-math } { fontspec }
+        \RequirePackage { fontspec }
+        \bool_if:NTF \l__projlib_font_useosf_bool
+          {
+            \setmainfont { LinBiolinum_R.otf } [
+              BoldFont       = LinBiolinum_RB.otf  ,
+              ItalicFont     = LinBiolinum_RI.otf  ,
+              BoldItalicFont = LinBiolinum_RBO.otf ,
+              Numbers        = OldStyle            , ]
+          }
+          {
+            \setmainfont { LinBiolinum_R.otf } [
+              BoldFont       = LinBiolinum_RB.otf  ,
+              ItalicFont     = LinBiolinum_RI.otf  ,
+              BoldItalicFont = LinBiolinum_RBO.otf , ]
+          }
+      }
+    \projlib_font_set_linespacing_latin:n { \setstretch { 1.05 } }
+    \RequirePackage [ italic, defaultmathsizes ] { mathastext }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
+  }
+
+\PassOptionsToPackage { verbose = silent } { microtype }
+\RequirePackage { microtype }
+%</projlib-font>
+%
+%<*projlib-language>
+\clist_const:Nn \c__projlib_language_supported_clist
+  {
+    english     ,
+    french      ,
+    ngerman     ,
+    italian     ,
+    portuguese  ,
+    brazilian   ,
+    spanish     ,
+    schinese    ,
+    tchinese    ,
+    japanese    ,
+    russian     ,
+  }
+
+\clist_new:N \g__projlib_language_babel_option_clist
+
+\str_new:N \g__projlib_language_main_str
+
+\bool_new:N        \g__projlib_language_enabled_all_bool
+\bool_gset_true:N  \g__projlib_language_enabled_all_bool
+
+\clist_map_inline:Nn \c__projlib_language_supported_clist
+  {
+    \bool_new:c        { g__projlib_language_enabled_ #1 _bool }
+    \bool_gset_false:c { g__projlib_language_enabled_ #1 _bool }
+  }
+
+\cs_new:Nn \projlib_language_set_option_no_babel:n
+  {
+    \bool_gset_false:N \g__projlib_language_enabled_all_bool
+    \bool_gset_true:c { g__projlib_language_enabled_ #1 _bool }
+    \str_if_empty:NT \g__projlib_language_main_str
+      {
+        \str_gset:Nn \g__projlib_language_main_str { #1 }
+      }
+  }
+\cs_new:Nn \projlib_language_set_option:n
+  {
+    \projlib_language_set_option_no_babel:n { #1 }
+    \clist_gput_left:Nn \g__projlib_language_babel_option_clist { #1 }
+  }
+
+\keys_define:nn { projlib-language }
+  {
+    , EN                  .meta:n       = { english }
+    , english             .code:n       = { \projlib_language_set_option:n { english } }
+    , English             .meta:n       = { english }
+    , FR                  .meta:n       = { french }
+    , french              .code:n       = { \projlib_language_set_option:n { french } }
+    , French              .meta:n       = { french }
+    , DE                  .meta:n       = { ngerman }
+    , german              .meta:n       = { ngerman }
+    , ngerman             .code:n       = { \projlib_language_set_option:n { ngerman } }
+    , German              .meta:n       = { ngerman }
+    , IT                  .meta:n       = { italian }
+    , italian             .code:n       = { \projlib_language_set_option:n { italian } }
+    , Italian             .meta:n       = { italian }
+    , PT                  .meta:n       = { portuguese }
+    , portuguese          .code:n       = { \projlib_language_set_option:n { portuguese } }
+    , Portuguese          .meta:n       = { portuguese }
+    , BR                  .meta:n       = { brazilian }
+    , brazilian           .code:n       = { \projlib_language_set_option:n { brazilian } }
+    , Brazilian           .meta:n       = { brazilian }
+    , ES                  .meta:n       = { spanish }
+    , spanish             .code:n       = { \clist_gput_left:Nn \g__projlib_language_babel_option_clist { es-notilde, es-noquoting }
+                                            \projlib_language_set_option:n { spanish } }
+    , Spanish             .meta:n       = { spanish }
+    , CN                  .meta:n       = { schinese }
+    , chinese             .meta:n       = { schinese }
+    , schinese            .code:n       = { \projlib_language_set_option_no_babel:n { schinese } }
+    , simplified-chinese  .meta:n       = { schinese }
+    , simplified~chinese  .meta:n       = { schinese }
+    , simplified chinese  .meta:n       = { schinese }
+    , Chinese             .meta:n       = { schinese }
+    , SChinese            .meta:n       = { schinese }
+    , Simplified-Chinese  .meta:n       = { schinese }
+    , Simplified~Chinese  .meta:n       = { schinese }
+    , Simplified Chinese  .meta:n       = { schinese }
+    , TC                  .meta:n       = { tchinese }
+    , tchinese            .code:n       = { \projlib_language_set_option_no_babel:n { tchinese } }
+    , traditional-chinese .meta:n       = { tchinese }
+    , traditional~chinese .meta:n       = { tchinese }
+    , traditional chinese .meta:n       = { tchinese }
+    , TChinese            .meta:n       = { tchinese }
+    , Traditional-Chinese .meta:n       = { tchinese }
+    , Traditional~Chinese .meta:n       = { tchinese }
+    , Traditional Chinese .meta:n       = { tchinese }
+    , JP                  .meta:n       = { japanese }
+    , japanese            .code:n       = { \projlib_language_set_option:n { japanese } }
+    , Japanese            .meta:n       = { japanese }
+    , RU                  .meta:n       = { russian }
+    , russian             .code:n       = { \projlib_language_set_option:n { russian } }
+    , Russian             .meta:n       = { russian }
+    , unknown             .code:n       = {}
+  }
+\ProcessKeysOptions { projlib-language }
+
+\cs_new_protected:Nn \projlib_language_clear_global_option:n
+  {
+    \clist_remove_all:cn { @classoptionslist } { #1 }
+  }
+
+\projlib_language_clear_global_option:n { chinese }
+\projlib_language_clear_global_option:n { Chinese }
+
+\clist_gput_right:Nn \g__projlib_language_babel_option_clist { shorthands = off }
+
+\str_if_empty:NT \g__projlib_language_main_str
+  {
+    \str_gset:Nn \g__projlib_language_main_str { english }
+  }
+
+\bool_if:NT \g__projlib_language_enabled_all_bool
+  {
+    \clist_map_inline:Nn \c__projlib_language_supported_clist
+      {
+        \bool_gset_true:c { g__projlib_language_enabled_ #1 _bool }
+      }
+  }
+
+
+\cs_new:Nn \projlib_language_str_to_languagename:n
+  {
+    \str_case_e:nnF { \str_foldcase:n { #1 } }
+      {
+        { all                }    { common     }
+        { common             }    { common     }
+        { cn                 }    { schinese   }
+        { chinese            }    { schinese   }
+        { schinese           }    { schinese   }
+        { simplifiedchinese  }    { schinese   }
+        { simplified-chinese }    { schinese   }
+        { tc                 }    { tchinese   }
+        { tchinese           }    { tchinese   }
+        { traditionalchinese }    { tchinese   }
+        { traditional-chinese}    { tchinese   }
+        { jp                 }    { japanese   }
+        { japanese           }    { japanese   }
+        { en                 }    { english    }
+        { english            }    { english    }
+        { fr                 }    { french     }
+        { french             }    { french     }
+        { de                 }    { ngerman    }
+        { german             }    { ngerman    }
+        { ngerman            }    { ngerman    }
+        { it                 }    { italian    }
+        { italian            }    { italian    }
+        { pt                 }    { portuguese }
+        { portuguese         }    { portuguese }
+        { br                 }    { brazilian  }
+        { brazilian          }    { brazilian  }
+        { es                 }    { spanish    }
+        { spanish            }    { spanish    }
+        { ru                 }    { russian    }
+        { russian            }    { russian    }
+      }
+      { #1 }
+  }
+
+\cs_new:Nn \projlib_language_str_to_languagetype:n
+  {
+    \str_case_e:nn { \str_foldcase:n { #1 } }
+      {
+        { cn                 }    {  cjk  }
+        { chinese            }    {  cjk  }
+        { schinese           }    {  cjk  }
+        { simplifiedchinese  }    {  cjk  }
+        { simplified-chinese }    {  cjk  }
+        { tc                 }    {  cjk  }
+        { tchinese           }    {  cjk  }
+        { traditionalchinese }    {  cjk  }
+        { traditional-chinese}    {  cjk  }
+        { jp                 }    {  cjk  }
+        { japanese           }    {  cjk  }
+        { en                 }    { latin }
+        { english            }    { latin }
+        { fr                 }    { latin }
+        { french             }    { latin }
+        { de                 }    { latin }
+        { german             }    { latin }
+        { ngerman            }    { latin }
+        { it                 }    { latin }
+        { italian            }    { latin }
+        { pt                 }    { latin }
+        { portuguese         }    { latin }
+        { br                 }    { latin }
+        { brazilian          }    { latin }
+        { es                 }    { latin }
+        { spanish            }    { latin }
+        { ru                 }    { latin }
+        { russian            }    { latin }
+      }
+  }
+
+\sys_if_engine_pdftex:T
+  {
+    \RequirePackage [T1] { fontenc }
+  }
+
+\bool_if:NTF \g__projlib_language_enabled_all_bool
+  {
+    \sys_if_engine_pdftex:F
+      {
+        \PassOptionsToPackage { japanese, russian } { babel }
+      }
+    \PassOptionsToPackage { italian, portuguese, brazilian, spanish, es-notilde, es-noquoting, ngerman, french, english, shorthands = off } { babel }
+  }
+  {
+    \PassOptionsToPackage { \g__projlib_language_babel_option_clist } { babel }
+  }
+
+\PassOptionsToPackage { italian, brazilian, spanish, ngerman, french, english } { cleveref }
+\RequirePackage { babel }
+
+
+\bool_if:NT \g__projlib_language_enabled_french_bool
+  {
+    \frenchsetup { PartNameFull = false }
+  }
+
+\bool_if:NT \g__projlib_language_enabled_portuguese_bool
+  {
+    \NewCommandCopy \__projlib_language_babel_ord: \ord
+    \cs_undefine:N \ord
+    \hook_gput_code:nnn { begindocument } { projlib-language }
+      {
+        \cs_if_exist:NT \ord
+          {
+            \NewCommandCopy \__projlib_language_user_ord: \ord
+            \cs_set_protected:Npn \ord
+              {
+                \mode_if_math:TF
+                  { \__projlib_language_user_ord:  }
+                  { \__projlib_language_babel_ord: }
+              }
+          }
+      }
+  }
+
+\babelprovide { schinese }
+\babelprovide { tchinese }
+
+
+\NewCommandCopy \projlib_language_backup_today:n \today
+
+\tl_new:N \g_projlib_language_settings_common_tl
+\clist_map_inline:Nn \c__projlib_language_supported_clist
+  {
+    \tl_new:c { g_projlib_language_settings_ #1 _tl }
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_common_tl
+  {
+    \cs_if_exist:NT \ProjLibToday
+      {
+        \RenewCommandCopy \today \ProjLibToday
+      }
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_schinese_tl
+  {
+    \g_projlib_language_settings_common_tl
+    \tl_gset:Nn \languagename          { schinese }
+    \tl_gset:cn { abstractname   }     { 摘要     }
+    \tl_gset:cn { proofname      }     { 证明     }
+    \tl_gset:cn { contentsname   }     { 目录     }
+    \tl_gset:cn { listfigurename }     { 插图     }
+    \tl_gset:cn { listtablename  }     { 表格     }
+    \tl_gset:cn { figurename     }     { 图       }
+    \tl_gset:cn { tablename      }     { 表       }
+    \tl_gset:cn { indexname      }     { 索引     }
+    \tl_gset:cn { appendixname   }     { 附录     }
+    \tl_gset:cn { refname        }     { 参考文献 }
+    \tl_gset:cn { bibname        }     { 参考文献 }
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_tchinese_tl
+  {
+    \g_projlib_language_settings_common_tl
+    \tl_gset:Nn \languagename          { tchinese }
+    \tl_gset:cn { abstractname   }     { 摘要     }
+    \tl_gset:cn { proofname      }     { 證明     }
+    \tl_gset:cn { contentsname   }     { 目錄     }
+    \tl_gset:cn { listfigurename }     { 插圖     }
+    \tl_gset:cn { listtablename  }     { 表格     }
+    \tl_gset:cn { figurename     }     { 圖       }
+    \tl_gset:cn { tablename      }     { 表       }
+    \tl_gset:cn { indexname      }     { 索引     }
+    \tl_gset:cn { appendixname   }     { 附錄     }
+    \tl_gset:cn { refname        }     { 參考文獻 }
+    \tl_gset:cn { bibname        }     { 參考文獻 }
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_japanese_tl
+  {
+    \selectlanguage { japanese }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_english_tl
+  {
+    \selectlanguage { english }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_french_tl
+  {
+    \selectlanguage { french }
+    \g_projlib_language_settings_common_tl
+    \tl_gset:cn { frenchpartname } { Partie }
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_ngerman_tl
+  {
+    \selectlanguage { ngerman }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_italian_tl
+  {
+    \selectlanguage { italian }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_portuguese_tl
+  {
+    \selectlanguage { portuguese }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_brazilian_tl
+  {
+    \selectlanguage { brazilian }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_spanish_tl
+  {
+    \selectlanguage { spanish }
+    \g_projlib_language_settings_common_tl
+  }
+
+\tl_gput_right:Nn \g_projlib_language_settings_russian_tl
+  {
+    \selectlanguage { russian }
+    \g_projlib_language_settings_common_tl
+  }
+
+\NewDocumentCommand \AddLanguageSetting { O{} m }
+  {
+    \tl_if_empty:nTF { #1 }
+      {
+        \tl_gput_right:Nn \g_projlib_language_settings_common_tl { #2 }
+      }
+      {
+        \tl_gput_right:cn { g_projlib_language_settings_ \projlib_language_str_to_languagename:n { #1 } _tl } { #2 }
+      }
+  }
+
+
+\RequirePackage { setspace }
+
+\tl_new:N  \g_projlib_language_linespacing_latin_tl
+\tl_new:N  \g_projlib_language_linespacing_cjk_tl
+
+\tl_gset:Nn \g_projlib_language_linespacing_latin_tl
+  {
+    \setstretch { 1.00 }
+  }
+\tl_gset:Nn \g_projlib_language_linespacing_cjk_tl
+  {
+    \onehalfspacing
+  }
+
+\cs_new:Nn \projlib_language_set_linespacing_latin:n
+  {
+    \tl_gset:Nn \g_projlib_language_linespacing_latin_tl { #1 }
+  }
+\cs_new:Nn \projlib_language_set_linespacing_cjk:n
+  {
+    \tl_gset:Nn \g_projlib_language_linespacing_cjk_tl { #1 }
+  }
+
+\tl_new:N  \g_projlib_language_parindent_latin_tl
+\tl_new:N  \g_projlib_language_parindent_cjk_tl
+
+\@ifclassloaded{beamer}
+  {
+    \tl_gset:Nn \g_projlib_language_parindent_latin_tl
+      {
+        \dim_set:Nn \parindent { 0em }
+      }
+    \tl_gset:Nn \g_projlib_language_parindent_cjk_tl
+      {
+        \dim_set:Nn \parindent { 0em }
+      }
+  }
+  {
+    \tl_gset:Nn \g_projlib_language_parindent_latin_tl
+      {
+        \dim_set:Nn \parindent { 1.5em }
+      }
+    \tl_gset:Nn \g_projlib_language_parindent_cjk_tl
+      {
+        \dim_set:Nn \parindent { 2em }
+      }
+  }
+
+\hook_gput_code:nnn { begindocument } { projlib-language }
+  {
+    \@ifpackageloaded{parskip}
+      {
+        \tl_gset:Nn \g_projlib_language_parindent_latin_tl
+          {
+            \dim_set:Nn \parindent { 0em }
+          }
+        \tl_gset:Nn \g_projlib_language_parindent_cjk_tl
+          {
+            \dim_set:Nn \parindent { 0em }
+          }
+      } {}
+  }
+
+\cs_new:Nn \projlib_language_set_parindent_latin:n
+  {
+    \tl_gset:Nn \g_projlib_language_parindent_latin_tl { #1 }
+  }
+\cs_new:Nn \projlib_language_set_parindent_cjk:n
+  {
+    \tl_gset:Nn \g_projlib_language_parindent_cjk_tl { #1 }
+  }
+
+\NewDocumentCommand \ProjLibLanguageSet { m m m }
+  % #1 = the thing to set
+  % #2 = language or type
+  % #3 = the setting
+  {
+    \use:c { projlib_language_set_ #1 _ #2 :n } { #3 }
+  }
+
+
+\cs_new:Nn \projlib_language_use_language_pure:n
+  {
+    \tl_use:c { g_projlib_language_settings_ \projlib_language_str_to_languagename:n { #1 } _tl }
+  }
+\cs_generate_variant:Nn \projlib_language_use_language_pure:n { e }
+
+\cs_new:Nn \projlib_language_use_language:n
+  {
+    \projlib_language_use_language_pure:n { #1 }
+    \tl_use:c { g_projlib_language_linespacing_ \projlib_language_str_to_languagetype:n { #1 } _tl }
+    \tl_use:c { g_projlib_language_parindent_ \projlib_language_str_to_languagetype:n { #1 } _tl }
+  }
+\cs_generate_variant:Nn \projlib_language_use_language:n { e }
+
+\NewDocumentCommand \UseLanguage { m }
+  {
+    \hook_gput_code:nnn { begindocument } { projlib-language }
+      {
+        \projlib_language_use_language:e { #1 }
+      }
+  }
+\NewDocumentCommand \UseOtherLanguage { m m }
+  {
+    \group_begin:
+      \projlib_language_use_language_pure:e { #1 }
+      #2
+    \group_end:
+  }
+
+\UseLanguage { \g__projlib_language_main_str }
+
+
+\cs_new:Nn \projlib_langauge_define_multilingual_text:Nn
+  { % #1 = command name (with backslash)
+    % #2 = key-value name configuration
+    \keyval_parse:nnn
+      {}
+      { \__projlib_langauge_define_multilingual_text_do:nnn { \cs_to_str:N #1 } }
+      { #2 }
+    \tl_gset:Nn #1
+      {
+        \tl_use:c { \cs_to_str:N #1 _projlib_language_text_ \languagename }
+      }
+  }
+\cs_generate_variant:Nn \projlib_langauge_define_multilingual_text:Nn { cn }
+
+\cs_new:Nn \__projlib_langauge_define_multilingual_text_do:nnn
+  { % #1 = command name
+    % #2 = language name
+    % #3 = the text
+    \exp_args:Ne \tl_gset:cn { #1 _projlib_language_text_ \projlib_language_str_to_languagename:n { #2 } } { #3 }
+  }
+
+\NewDocumentCommand \DefineMultilingualText { m m }
+  % #1 = command name
+  % #2 = key-value name configuration
+  {
+    \projlib_langauge_define_multilingual_text:Nn #1 { #2 }
+  }
+%</projlib-language>
+%
+%<*projlib-logo>
+\keys_define:nn { projlib-logo }
+  {
+    , draft   .bool_set:N   = \l__projlib_logo_fast_bool
+    , draft   .initial:n    = { false }
+    , fast    .bool_set:N   = \l__projlib_logo_fast_bool
+    , unknown .code:n       = {}
+  }
+\ProcessKeysOptions { projlib-logo }
+
+\bool_if:NT \l__projlib_logo_fast_bool
+  {
+    \DeclareRobustCommand * \ProjLib
+      {
+        \group_begin:
+          \normalfont ProjLib
+        \group_end:
+      }
+    \endinput
+  }
+
+\cs_if_exist:cTF { fontspec }
+  {
+    \newfontface \__projlib_logo_font: { LinBiolinum_R.otf }
+  }
+  {
+    \RequirePackage [T1] { fontenc }
+    \cs_gset:Nn \__projlib_logo_font:
+      { \fontfamily { LinuxBiolinumT-TLF } \selectfont }
+  }
+
+\tl_new:N   \g__projlib_logo_sigma_j_tl
+\tl_gset:Nn \g__projlib_logo_sigma_j_tl
+  {
+    \vbox:n
+      {
+        \offinterlineskip
+        \hbox_overlap_center:n
+          {
+            \skip_horizontal:n { 0.75ex }
+            \hbox_set:Nn    \l_tmpa_box { \usefont{U}{zeur}{b}{n} \symbol{"06} }
+            \box_rotate:Nn  \l_tmpa_box { -10 }
+            \box_scale:Nnn  \l_tmpa_box {.4} {.4}
+            \box_use:N      \l_tmpa_box
+          }
+        \skip_vertical:n { 0.15ex }
+        \hbox:n { \j }
+      }
+  }
+
+% \RequirePackage { xcolor }
+% \cs_new_protected:Nn \projlib_logo_generic:n
+%   {
+%     \group_begin:
+%       \normalfont
+%       \__projlib_logo_font:
+%       \textcolor { blue!55!cyan }       { P }
+%       \textcolor { blue!45!cyan }       { r }
+%       \textcolor { blue!30!cyan }       { o }
+%       \textcolor { green!70!black!70 }  { #1 }
+%       \textcolor { red!20!yellow }      { L }
+%       \textcolor { red!40!yellow }      { i }
+%       \textcolor { red!55!yellow }      { b }
+%     \group_end:
+%   }
+\cs_new_protected:Nn \projlib_logo_generic:n
+  {
+    \group_begin:
+      \normalfont
+      \__projlib_logo_font:
+      \color_group_begin:
+        \color_select:n { blue!60!cyan }      { P }
+        \color_select:n { blue!45!cyan }      { r }
+        \color_select:n { blue!30!cyan }      { o }
+        \color_select:n { green!70!black!70 } { #1 }
+        \color_select:n { red!20!yellow }     { L }
+        \color_select:n { red!40!yellow }     { i }
+        \color_select:n { red!60!yellow }     { b }
+      \color_group_end:
+    \group_end:
+  }
+
+\DeclareRobustCommand * \ProjLib
+  {
+    \projlib_logo_generic:n { \g__projlib_logo_sigma_j_tl }
+  }
+\DeclareRobustCommand * \ProjLibText
+  {
+    \projlib_logo_generic:n { j }
+  }
+%</projlib-logo>
+%
+%<*projlib-math>
+\keys_define:nn { projlib-math }
+  {
+    , unknown     .code:n     = {}
+  }
+\ProcessKeysOptions { projlib-math }
+
+\RequirePackage { mathtools }
+\RequirePackage { mathrsfs }
+\PassOptionsToPackage { warnings-off = { mathtools-colon, mathtools-overbracket } } { unicode-math }
+\@ifpackageloaded { unicode-math } {} { \RequirePackage { amssymb } }
+
+
+\msg_new:nnn { projlib-math }
+  { operator-not-define }
+  { The~math~operator~"\iow_char:N \\#1"~cannot~be~defined,~a~command~with~the~same~name~has~already~existed. }
+
+\keys_define:nn { projlib-math-operator }
+  {
+    , style        .tl_set:N     = \l__projlib_math_operator_style_tl
+    , unknown      .code:n       = {}
+  }
+
+\cs_new_protected:Nn \projlib_math_define_operator:nnn
+  % #1 = bool for star or empty
+  % #2 = list of operators
+  % #3 = the option
+  {
+    \tl_clear:N \l__projlib_math_operator_style_tl
+    \keys_set:nn { projlib-math-operator } { #3 }
+    \clist_map_inline:nn { #2 }
+      {
+        \str_if_in:nnTF { ##1 } { = }
+          {
+            \seq_set_split:Nnn \l_tmpa_seq { = } { ##1 }
+            \__projlib_math_define_operator:nee { #1 } { \seq_item:Nn \l_tmpa_seq { 1 } } { \seq_item:Nn \l_tmpa_seq { 2 } }
+          }
+          {
+            \__projlib_math_define_operator:nee { #1 } { ##1 } { ##1 }
+          }
+      }
+  }
+
+\cs_new_protected:Nn \__projlib_math_define_operator:nnn
+  % #1 = bool for star or empty
+  % #2 = the operator
+  % #3 = the content
+  {
+    \cs_if_exist:cTF { #2 }
+      {
+        \msg_warning:nnn  { projlib-math } { operator-not-define } { #2 }
+      }
+      {
+        \bool_if:NTF #1
+          {
+            \exp_args:Nnf \use:n
+              { \exp_args:Nnc \use:n { \DeclareMathOperator* } { #2 } }
+          }
+          {
+            \exp_args:Nnf \use:n
+              { \exp_args:Nc \DeclareMathOperator { #2 } }
+          }
+          % This is the f-argument of  \exp_args:Nnf :
+          {
+            \exp_args:NnV \use:nn
+              { \exp_stop_f: }
+              { \l__projlib_math_operator_style_tl } { #3 }
+          }
+      }
+  }
+\cs_generate_variant:Nn \__projlib_math_define_operator:nnn { nee }
+
+\NewDocumentCommand \DefineOperator { s O{} m O{} }
+  {
+    \tl_if_blank:nTF { #2 }
+      {
+        \projlib_math_define_operator:nnn { #1 } { #3 } { #4 }
+      }
+      {
+        \projlib_math_define_operator:nnn { #1 } { #3 } { #2 }
+      }
+  }
+
+
+\msg_new:nnn { projlib-math }
+  { shortcut-not-define }
+  { The~shortcut~"\iow_char:N \\#1"~cannot~be~defined,~a~command~with~the~same~name~has~already~existed. }
+
+\msg_new:nnn { projlib-math }
+  { shortcut-type-not-define }
+  { The~shortcut~type~"#1"~is~not~available,~a~command~with~the~same~name~has~already~existed. }
+
+\keys_define:nn { projlib-math-shortcut }
+  {
+    , prefix       .clist_set:N  = \l__projlib_math_shortcut_prefix_clist
+    , type         .tl_set:N     = \l__projlib_math_shortcut_type_tl
+    , style        .tl_set:N     = \l__projlib_math_shortcut_style_tl
+    , unknown      .code:n       = {}
+  }
+
+\cs_new_protected:Nn \projlib_math_define_shortcut:nnn
+  % #1 = bool for star or empty
+  % (currently the starred version is the same as normal version)
+  % #2 = list of shortcuts
+  % #3 = the option
+  {
+    \clist_clear:N \l__projlib_math_shortcut_prefix_clist
+    \tl_clear:N \l__projlib_math_shortcut_type_tl
+    \tl_clear:N \l__projlib_math_shortcut_style_tl
+    \keys_set:nn { projlib-math-shortcut } { #3 }
+    \tl_if_empty:NF \l__projlib_math_shortcut_type_tl
+      {
+        \cs_if_exist:cTF { \l__projlib_math_shortcut_type_tl }
+          {
+            \exp_args:Nne \use:n
+              { \msg_warning:nnn  { projlib-math } { shortcut-type-not-define } }
+              { \l__projlib_math_shortcut_type_tl }
+          }
+          {
+            \exp_args:Nno \use:n
+              {
+                \exp_args:Nc \NewDocumentCommand { \l__projlib_math_shortcut_type_tl } { m }
+              }
+              {
+                \l__projlib_math_shortcut_style_tl { ##1 }
+              }
+          }
+      }
+    \clist_map_inline:nn { #2 }
+      {
+        \str_if_in:nnTF { ##1 } { = }
+          {
+            \seq_set_split:Nnn \l_tmpa_seq { = } { ##1 }
+            \clist_if_empty:NTF \l__projlib_math_shortcut_prefix_clist
+              {
+                \__projlib_math_define_shortcut:ee { \seq_item:Nn \l_tmpa_seq { 1 } } { \seq_item:Nn \l_tmpa_seq { 2 } }
+              }
+              {
+                \clist_map_inline:Nn \l__projlib_math_shortcut_prefix_clist
+                  {
+                    \__projlib_math_define_shortcut:ee { ####1 \seq_item:Nn \l_tmpa_seq { 1 } } { \seq_item:Nn \l_tmpa_seq { 2 } }
+                  }
+              }
+          }
+          {
+            \clist_if_empty:NTF \l__projlib_math_shortcut_prefix_clist
+              {
+                \__projlib_math_define_shortcut:ee { ##1 } { ##1 }
+              }
+              {
+                \clist_map_inline:Nn \l__projlib_math_shortcut_prefix_clist
+                  {
+                    \__projlib_math_define_shortcut:ee { ####1 ##1 } { ##1 }
+                  }
+              }
+          }
+      }
+  }
+
+\cs_new_protected:Nn \__projlib_math_define_shortcut:nn
+  % #1 = command name
+  % #2 = the content
+  {
+    \cs_if_exist:cTF { #1 }
+      {
+        \msg_warning:nnn { projlib-math } { shortcut-type-not-define } { #1 }
+      }
+      {
+        \exp_args:Nno \use:n
+          { \exp_args:Nc \NewDocumentCommand { #1 } {} }
+          { \l__projlib_math_shortcut_style_tl { #2 } }
+      }
+  }
+\cs_generate_variant:Nn \__projlib_math_define_shortcut:nn { ee }
+
+\NewDocumentCommand \DefineShortcut { s O{} m O{} }
+  {
+    \tl_if_blank:nTF { #2 }
+      {
+        \projlib_math_define_shortcut:nnn { #1 } { #3 } { #4 }
+      }
+      {
+        \projlib_math_define_shortcut:nnn { #1 } { #3 } { #2 }
+      }
+  }
+%</projlib-math>
+%
+%<*projlib-paper>
+\keys_define:nn { projlib-paper }
+  {
+    , preview-mode      .bool_set:N         = \l__projlib_paper_preview_bool
+    , preview-mode      .initial:n          = { false }
+    , paper-style       .tl_set:N           = \l__projlib_paper_paperstyle_tl
+    , paper-style       .initial:n          = { normal }
+    , paper-style       .value_required:n   = true
+    , paper~style       .tl_set:N           = \l__projlib_paper_paperstyle_tl
+    , paper style       .tl_set:N           = \l__projlib_paper_paperstyle_tl
+    , yellow-paper      .meta:n             = { paperstyle = yellow     }
+    , yellow~paper      .meta:n             = { paperstyle = yellow     }
+    , yellow paper      .meta:n             = { paperstyle = yellow     }
+    , parchment-paper   .meta:n             = { paperstyle = parchment  }
+    , parchment~paper   .meta:n             = { paperstyle = parchment  }
+    , parchment paper   .meta:n             = { paperstyle = parchment  }
+    , green-paper       .meta:n             = { paperstyle = green      }
+    , green~paper       .meta:n             = { paperstyle = green      }
+    , green paper       .meta:n             = { paperstyle = green      }
+    , light-gray-paper  .meta:n             = { paperstyle = lightgray  }
+    , light~gray~paper  .meta:n             = { paperstyle = lightgray  }
+    , light gray-paper  .meta:n             = { paperstyle = lightgray  }
+    , light gray~paper  .meta:n             = { paperstyle = lightgray  }
+    , light gray paper  .meta:n             = { paperstyle = lightgray  }
+    , gray-paper        .meta:n             = { paperstyle = gray       }
+    , gray~paper        .meta:n             = { paperstyle = gray       }
+    , gray paper        .meta:n             = { paperstyle = gray       }
+    , nord-paper        .meta:n             = { paperstyle = nord       }
+    , nord~paper        .meta:n             = { paperstyle = nord       }
+    , nord paper        .meta:n             = { paperstyle = nord       }
+    , dark-paper        .meta:n             = { paperstyle = dark       }
+    , dark~paper        .meta:n             = { paperstyle = dark       }
+    , dark paper        .meta:n             = { paperstyle = dark       }
+    , unknown           .code:n             = {}
+  }
+\ProcessKeysOptions { projlib-paper }
+
+\cs_new:Nn \projlib_paper_preview_disable:
+  {
+    \bool_set_false:c { l__projlib_paper_preview_bool }
+  }
+
+\hook_gput_code:nnn { begindocument/before } { projlib-paper }
+  {
+    \bool_if:NT \l__projlib_paper_preview_bool
+      {
+        \dim_set:Nn \paperwidth
+          {
+            \dim_eval:n { \textwidth * 21 / 20 }
+          }
+        \dim_set:Nn \paperheight
+          {
+            \dim_eval:n { ( \textheight + \headheight + \headsep + \footskip ) * 21 / 20 }
+          }
+        \dim_set:Nn \oddsidemargin
+          {
+            \dim_eval:n { ( \paperwidth - \textwidth ) / 2 - 1in }
+          }
+        \dim_set:Nn \evensidemargin
+          {
+            \dim_eval:n { ( \paperwidth - \textwidth ) / 2 - 1in }
+          }
+        \dim_set:Nn \topmargin
+          {
+            \dim_eval:n { ( \paperheight - \textheight - \headheight - \headsep - \footskip ) / 2 - 1in }
+          }
+      }
+  }
+
+\RequirePackage { xcolor }
+
+\definecolor { paper }     { RGB } { 255, 255, 255 }
+\definecolor { main-text } { RGB } {   0,   0,   0 }
+
+\str_case_e:nn { \l__projlib_paper_paperstyle_tl }
+  {
+    { yellow      } { \definecolor { paper }     { RGB } { 247, 246, 233 } }
+    { parchment   } { \definecolor { paper }     { RGB } { 224, 204, 160 } }
+    { green       } { \definecolor { paper }     { RGB } { 207, 231, 207 } }
+    { lightgray   } { \definecolor { paper }     { RGB } { 236, 239, 244 }
+                      \definecolor { main-text } { RGB } {  37,  41,  46 } }
+    { light-gray  } { \definecolor { paper }     { RGB } { 236, 239, 244 }
+                      \definecolor { main-text } { RGB } {  37,  41,  46 } }
+    { gray        } { \definecolor { paper }     { RGB } { 127, 130, 136 }
+                      \definecolor { main-text } { RGB } { 236, 239, 244 } }
+    { nord        } { \definecolor { paper }     { RGB } {  46,  52,  64 }
+                      \definecolor { main-text } { RGB } { 214, 220, 230 } }
+    { dark        } { \definecolor { paper }     { RGB } {  28,  29,  33 }
+                      \definecolor { main-text } { RGB } { 210, 213, 217 } }
+  }
+
+\cs_new:Nn \projlib_paper_set_page_color:n
+  {
+    \pagecolor { #1 }
+  }
+\cs_new:Nn \projlib_paper_set_text_color:n
+  {
+    \color { #1 }
+    \cs_gset_eq:cc { default@color } { current@color }
+  }
+
+\projlib_paper_set_page_color:n { paper }
+\projlib_paper_set_text_color:n { main-text }
+
+\hook_gput_code:nnn { begindocument/before } { projlib-paper }
+  {
+    \cs_if_exist:NT \tcbset
+      { \tcbset { colupper = main-text, collower = main-text } }
+  }
+%</projlib-paper>
+%
+%<*projlib-theorem>
+\keys_define:nn { projlib-theorem }
+  {
+    , no-theorems           .bool_set:N         = \l__projlib_theorem_no_theorems_bool
+    , no-theorems           .initial:n          = { false }
+    , no~theorems           .bool_set:N         = \l__projlib_theorem_no_theorems_bool
+    , no theorems           .bool_set:N         = \l__projlib_theorem_no_theorems_bool
+    , nothms                .bool_set:N         = \l__projlib_theorem_no_theorems_bool
+    , no-theorem-numbering  .bool_set:N         = \l__projlib_theorem_no_theorem_numbering_bool
+    , no-theorem-numbering  .initial:n          = { false }
+    , no~theorem~numbering  .bool_set:N               = \l__projlib_theorem_no_theorem_numbering_bool
+    , no theorem numbering  .bool_set:N         = \l__projlib_theorem_no_theorem_numbering_bool
+    , nothmnum              .bool_set:N         = \l__projlib_theorem_no_theorem_numbering_bool
+    , theorem-numbering     .tl_set:N           = \l__projlib_theorem_theorem_numbering_tl
+    , theorem-numbering     .default:n          = { * }
+    , theorem~numbering     .tl_set:N           = \l__projlib_theorem_theorem_numbering_tl
+    , theorem~numbering     .default:n          = { * }
+    , theorem numbering     .tl_set:N           = \l__projlib_theorem_theorem_numbering_tl
+    , theorem numbering     .default:n          = { * }
+    , thmnum                .tl_set:N           = \l__projlib_theorem_theorem_numbering_tl
+    , thmnum                .default:n          = { * }
+    , complex-name          .bool_set:N         = \l__projlib_theorem_complexname_bool
+    , complex-name          .initial:n          = { true }
+    , complex~name          .bool_set:N         = \l__projlib_theorem_complexname_bool
+    , complex name          .bool_set:N         = \l__projlib_theorem_complexname_bool
+    , simple-name           .bool_set_inverse:N = \l__projlib_theorem_complexname_bool
+    , simple~name           .bool_set_inverse:N = \l__projlib_theorem_complexname_bool
+    , simple name           .bool_set_inverse:N = \l__projlib_theorem_complexname_bool
+    , no-preset-names       .bool_set_inverse:N = \l__projlib_theorem_presetname_bool
+    , no-preset-names       .initial:n          = { false }
+    , no~preset~names       .bool_set_inverse:N = \l__projlib_theorem_presetname_bool
+    , no preset names       .bool_set_inverse:N = \l__projlib_theorem_presetname_bool
+    , unknown               .code:n       = { \PassOptionsToPackage { \CurrentOption } { create-theorem } }
+  }
+\ProcessKeysOptions { projlib-theorem }
+
+\clist_const:Nn \c_projlib_theorem_supported_clist
+  {
+    assertion                 ,
+    assumption                ,
+    axiom                     ,
+    conclusion                ,
+    conjecture                ,
+    convention                ,
+    corollary                 ,
+    definition                ,
+    example                   ,
+    exercise                  ,
+    fact                      ,
+    hypothesis                ,
+    lemma                     ,
+    notation                  ,
+    observation               ,
+    postulate                 ,
+    problem                   ,
+    property                  ,
+    proposition               ,
+    question                  ,
+    remark                    ,
+    theorem                   ,
+    definition-proposition    ,
+    definition-theorem        ,
+  }
+
+\@ifclassloaded { beamer }
+  {
+    \RequirePackage { silence }
+    \WarningFilter { cleveref } { hyperref~package~loaded~with~implicit=false~option }
+    \bool_set_true:N \l__projlib_theorem_no_theorem_numbering_bool
+    \bool_if:NF \l__projlib_theorem_no_theorems_bool
+      {
+        \cs_undefine:c { theorem    }
+        \cs_undefine:c { lemma      }
+        \cs_undefine:c { corollary  }
+        \cs_undefine:c { definition }
+        \cs_undefine:c { fact       }
+        \cs_undefine:c { example    }
+        \cs_undefine:c { problem    }
+      }
+  } {}
+
+\RequirePackage { projlib-language }
+
+% \bool_if:NF \l__projlib_theorem_complexname_bool
+%   {
+%     \PassOptionsToPackage { no preset names } { create-theorem }
+%   }
+
+\RequirePackage { amsthm }
+\RequirePackage { create-theorem }
+
+
+\bool_if:NF \l__projlib_theorem_no_theorems_bool
+  {
+    \bool_if:NTF \l__projlib_theorem_no_theorem_numbering_bool
+      {
+        \exp_args:Nv \CreateTheorem { c_projlib_theorem_supported_clist } { numberless }
+      }
+      {
+        \tl_if_blank:eTF \l__projlib_theorem_theorem_numbering_tl
+          {
+            \cs_if_exist:cTF { c@chapter }
+              { % with \chapter
+                \CreateTheorem {theorem} { parent counter = chapter }
+              }
+              { % without \chapter
+                \CreateTheorem {theorem} { parent counter = section }
+              }
+          }
+          {
+            \tl_if_eq:NnTF \l__projlib_theorem_theorem_numbering_tl { * }
+              {
+                \CreateTheorem {theorem} { }
+              }
+              {
+                \CreateTheorem {theorem} { parent counter = \l__projlib_theorem_theorem_numbering_tl }
+              }
+          }
+
+        \exp_args:Nv \CreateTheorem { c_projlib_theorem_supported_clist } { shared counter = theorem, quiet }
+      }
+  }
+
+
+\AddLanguageSetting [ schinese ]
+  {
+    \crefname { equation } { 式 } { 式 }
+    \crefname { figure } { 图 } { 图 }
+    \crefname { table } { 表 } { 表 }
+    \crefname { appendix } { 附录 } { 附录 }
+    \Crefname { equation } { 式 } { 式 }
+    \Crefname { figure } { 图 } { 图 }
+    \Crefname { table } { 表 } { 表 }
+    \Crefname { appendix } { 附录 } { 附录 }
+    \tl_gset:Nn { \crefpairconjunction } { 、 }
+    \tl_gset:Nn { \crefmiddleconjunction } { 、 }
+    \tl_gset:Nn { \creflastconjunction } { \nobreakspace 和 \nobreakspace }
+    \tl_gset:Nn { \crefpairgroupconjunction } { \nobreakspace 和 \nobreakspace }
+    \tl_gset:Nn { \crefmiddlegroupconjunction } { 、 }
+    \tl_gset:Nn { \creflastgroupconjunction } { \nobreakspace 以及 \nobreakspace }
+    \tl_gset:Nn { \crefrangeconjunction } { ～ }
+  }
+
+\AddLanguageSetting [ tchinese ]
+  {
+    \crefname { equation } { 式 } { 式 }
+    \crefname { figure } { 圖 } { 圖 }
+    \crefname { table } { 表 } { 表 }
+    \crefname { appendix } { 附錄 } { 附錄 }
+    \Crefname { equation } { 式 } { 式 }
+    \Crefname { figure } { 圖 } { 圖 }
+    \Crefname { table } { 表 } { 表 }
+    \Crefname { appendix } { 附錄 } { 附錄 }
+    \tl_gset:Nn { \crefpairconjunction } { 、 }
+    \tl_gset:Nn { \crefmiddleconjunction } { 、 }
+    \tl_gset:Nn { \creflastconjunction } { \nobreakspace 與 \nobreakspace }
+    \tl_gset:Nn { \crefpairgroupconjunction } { \nobreakspace 與 \nobreakspace }
+    \tl_gset:Nn { \crefmiddlegroupconjunction } { 、 }
+    \tl_gset:Nn { \creflastgroupconjunction } { \nobreakspace 以及 \nobreakspace }
+    \tl_gset:Nn { \crefrangeconjunction } { ～ }
+  }
+
+\AddLanguageSetting [ japanese ]
+  {
+    \crefname { equation } { 式 } { 式 }
+    \crefname { figure } { 図 } { 図 }
+    \crefname { table } { 表 } { 表 }
+    \Crefname { appendix } { 付録 } { 付録 }
+    \Crefname { equation } { 式 } { 式 }
+    \Crefname { figure } { 図 } { 図 }
+    \Crefname { table } { 表 } { 表 }
+    \Crefname { appendix } { 付録 } { 付録 }
+    \tl_gset:Nn { \crefpairconjunction } { \nobreakspace と \nobreakspace }
+    \tl_gset:Nn { \crefmiddleconjunction } { \nobreakspace と \nobreakspace }
+    \tl_gset:Nn { \creflastconjunction } { \nobreakspace と \nobreakspace }
+    \tl_gset:Nn { \crefpairgroupconjunction } { \nobreakspace と \nobreakspace }
+    \tl_gset:Nn { \crefmiddlegroupconjunction } { \nobreakspace と \nobreakspace }
+    \tl_gset:Nn { \creflastgroupconjunction } { \nobreakspace 及び \nobreakspace }
+    \tl_gset:Nn { \crefrangeconjunction } { ～ }
+  }
+
+\AddLanguageSetting [ russian ]
+  {
+    \crefname { equation } { уравнение } { уравнения }
+    \crefname { figure } { рис. } { рис. }
+    \crefname { table } { таблица } { таблицы }
+    \crefname { appendix } { приложение } { приложения }
+    \Crefname { equation } { Уравнение } { Уравнения }
+    \Crefname { figure } { Рис. } { Рис. }
+    \Crefname { table } { Таблица } { Таблицы }
+    \Crefname { appendix } { Приложение } { Приложения }
+    \tl_gset:Nn { \crefpairconjunction } { \nobreakspace и \nobreakspace }
+    \tl_gset:Nn { \crefmiddleconjunction } { , \nobreakspace }
+    \tl_gset:Nn { \creflastconjunction } { \nobreakspace и \nobreakspace }
+    \tl_gset:Nn { \crefpairgroupconjunction } { \nobreakspace и \nobreakspace }
+    \tl_gset:Nn { \crefmiddlegroupconjunction } { , \nobreakspace  }
+    \tl_gset:Nn { \creflastgroupconjunction } { \nobreakspace и \nobreakspace }
+    \tl_gset:Nn { \crefrangeconjunction } { \nobreakspace \textasciitilde \nobreakspace }
+  }
+
+\AddLanguageSetting [ portuguese ]
+  {
+    \crefname { equation } { eq. } { eqs. }
+    \crefname { figure } { fig. } { figs. }
+    \crefname { table } { tabela } { tabelas }
+    \crefname { appendix } { apêndice } { apêndices }
+    \Crefname { equation } { Eq. } { Eqs. }
+    \Crefname { figure } { Fig. } { Figs. }
+    \Crefname { table } { Tabela } { Tabelas }
+    \Crefname { appendix } { Apêndice } { Apêndices }
+    \tl_gset:Nn { \crefpairconjunction } { \nobreakspace e \nobreakspace }
+    \tl_gset:Nn { \crefmiddleconjunction } { , \nobreakspace }
+    \tl_gset:Nn { \creflastconjunction } { \nobreakspace e \nobreakspace }
+    \tl_gset:Nn { \crefpairgroupconjunction } { \nobreakspace e \nobreakspace }
+    \tl_gset:Nn { \crefmiddlegroupconjunction } { , \nobreakspace }
+    \tl_gset:Nn { \creflastgroupconjunction } { \nobreakspace e \nobreakspace }
+    \tl_gset:Nn { \crefrangeconjunction } { \nobreakspace a \nobreakspace }
+  }
+
+
+\bool_if:NF \l__projlib_theorem_presetname_bool { \endinput }
+\bool_if:NT \l__projlib_theorem_complexname_bool { \endinput }
+
+
+\NameTheorem { assertion }
+  {
+    , heading =   {
+                    , english     = Assertion
+                    , french      = Assertion
+                    , ngerman     = Behauptung
+                    , italian     = Asserzione
+                    , portuguese  = Asserção
+                    , brazilian   = Asserção
+                    , spanish     = Aserción
+                    , schinese    = 断言
+                    , tchinese    = 斷言
+                    , japanese    = アサーション
+                    , russian     = Утверждение
+                  }
+    , crefname =  {
+                    , english     = {Assertion}{Assertion}
+                    , french      = [l']{Assertion}[les]{Assertion}
+                    , ngerman     = {Behauptung}{Behauptung}
+                    , italian     = [l']{Asserzione}[le]{Asserzione}
+                    , portuguese  = [a]{Asserção}[as]{Asserção}
+                    , brazilian   = [a]{Asserção}[as]{Asserção}
+                    , spanish     = [la]{Aserción}[las]{Aserción}
+                    , schinese    = {断言}{断言}
+                    , tchinese    = {斷言}{斷言}
+                    , japanese    = {アサーション}{アサーション}
+                    , russian     = {Утверждение}{Утверждение}
+                  }
+    , Crefname =  {
+                    , english     = {Assertion}{Assertion}
+                    , french      = [L']{Assertion}[Les]{Assertion}
+                    , ngerman     = {Behauptung}{Behauptung}
+                    , italian     = [L']{Asserzione}[Le]{Asserzione}
+                    , portuguese  = [A]{Asserção}[As]{Asserção}
+                    , brazilian   = [A]{Asserção}[As]{Asserção}
+                    , spanish     = [La]{Aserción}[Las]{Aserción}
+                    , schinese    = {断言}{断言}
+                    , tchinese    = {斷言}{斷言}
+                    , japanese    = {アサーション}{アサーション}
+                    , russian     = {Утверждение}{Утверждение}
+                  }
+  }
+
+\NameTheorem { assumption }
+  {
+    , heading =   {
+                    , english     = Assumption
+                    , french      = Supposition
+                    , ngerman     = Annahme
+                    , italian     = Supposizione
+                    , portuguese  = Suposição
+                    , brazilian   = Suposição
+                    , spanish     = Suposición
+                    , schinese    = 假定
+                    , tchinese    = 假定
+                    , japanese    = 仮定
+                    , russian     = Предположение
+                  }
+    , crefname =  {
+                    , english     = {Assumption}{Assumption}
+                    , french      = [la]{Supposition}[les]{Supposition}
+                    , ngerman     = {Annahme}{Annahme}
+                    , italian     = [la]{Supposizione}[le]{Supposizione}
+                    , portuguese  = [a]{Suposição}[as]{Suposição}
+                    , brazilian   = [a]{Suposição}[as]{Suposição}
+                    , spanish     = [la]{Suposición}[las]{Suposición}
+                    , schinese    = {假定}{假定}
+                    , tchinese    = {假定}{假定}
+                    , japanese    = {仮定}{仮定}
+                    , russian     = {Предположение}{Предположение}
+                  }
+    , Crefname =  {
+                    , english     = {Assumption}{Assumption}
+                    , french      = [La]{Supposition}[Les]{Supposition}
+                    , ngerman     = {Annahme}{Annahme}
+                    , italian     = [la]{Supposizione}[le]{Supposizione}
+                    , portuguese  = [A]{Suposição}[As]{Suposição}
+                    , brazilian   = [A]{Suposição}[As]{Suposição}
+                    , spanish     = [La]{Suposición}[Las]{Suposición}
+                    , schinese    = {假定}{假定}
+                    , tchinese    = {假定}{假定}
+                    , japanese    = {仮定}{仮定}
+                    , russian     = {Предположение}{Предположение}
+                  }
+  }
+
+\NameTheorem { axiom }
+  {
+    , heading =   {
+                    , english     = Axiom
+                    , french      = Axiome
+                    , ngerman     = Axiom
+                    , italian     = Assioma
+                    , portuguese  = Axioma
+                    , brazilian   = Axioma
+                    , spanish     = Axioma
+                    , schinese    = 公理
+                    , tchinese    = 公理
+                    , japanese    = 公理
+                    , russian     = Аксиома
+                  }
+    , crefname =  {
+                    , english     = {Axiom}{Axiom}
+                    , french      = [l']{Axiome}[les]{Axiome}
+                    , ngerman     = {Axiom}{Axiom}
+                    , italian     = [l']{Assioma}[gli]{Assioma}
+                    , portuguese  = [o]{Axioma}[os]{Axioma}
+                    , brazilian   = [o]{Axioma}[os]{Axioma}
+                    , spanish     = [el]{Axioma}[los]{Axioma}
+                    , schinese    = {公理}{公理}
+                    , tchinese    = {公理}{公理}
+                    , japanese    = {公理}{公理}
+                    , russian     = {Аксиома}{Аксиома}
+                  }
+    , Crefname =  {
+                    , english     = {Axiom}{Axiom}
+                    , french      = [L']{Axiome}[Les]{Axiome}
+                    , ngerman     = {Axiom}{Axiom}
+                    , italian     = [L']{Assioma}[Gli]{Assioma}
+                    , portuguese  = [O]{Axioma}[Os]{Axioma}
+                    , brazilian   = [O]{Axioma}[Os]{Axioma}
+                    , spanish     = [El]{Axioma}[Los]{Axioma}
+                    , schinese    = {公理}{公理}
+                    , tchinese    = {公理}{公理}
+                    , japanese    = {公理}{公理}
+                    , russian     = {Аксиома}{Аксиома}
+                  }
+  }
+
+\NameTheorem { conclusion }
+  {
+    , heading =   {
+                    , english     = Conclusion
+                    , french      = Conclusion
+                    , ngerman     = Schlussfolgerung
+                    , italian     = Conclusione
+                    , portuguese  = Conclusão
+                    , brazilian   = Conclusão
+                    , spanish     = Conclusión
+                    , schinese    = 结论
+                    , tchinese    = 結論
+                    , japanese    = 結論
+                    , russian     = Вывод
+                  }
+    , crefname =  {
+                    , english     = {Conclusion}{Conclusion}
+                    , french      = [la]{Conclusion}[Les]{Conclusion}
+                    , ngerman     = {Schlussfolgerung}{Schlussfolgerung}
+                    , italian     = [la]{Conclusione}[le]{Conclusione}
+                    , portuguese  = [a]{Conclusão}[as]{Conclusão}
+                    , brazilian   = [a]{Conclusão}[as]{Conclusão}
+                    , spanish     = [la]{Conclusión}[las]{Conclusión}
+                    , schinese    = {结论}{结论}
+                    , tchinese    = {結論}{結論}
+                    , japanese    = {結論}{結論}
+                    , russian     = {Вывод}{Вывод}
+                  }
+    , Crefname =  {
+                    , english     = {Conclusion}{Conclusion}
+                    , french      = [La]{Conclusion}[Les]{Conclusion}
+                    , ngerman     = {Schlussfolgerung}{Schlussfolgerung}
+                    , italian     = [La]{Conclusione}[Le]{Conclusione}
+                    , portuguese  = [A]{Conclusão}[As]{Conclusão}
+                    , brazilian   = [A]{Conclusão}[As]{Conclusão}
+                    , spanish     = [La]{Conclusión}[Las]{Conclusión}
+                    , schinese    = {结论}{结论}
+                    , tchinese    = {結論}{結論}
+                    , japanese    = {結論}{結論}
+                    , russian     = {Вывод}{Вывод}
+                  }
+  }
+
+\NameTheorem { conjecture }
+  {
+    , heading =   {
+                    , english     = Conjecture
+                    , french      = Conjecture
+                    , ngerman     = Vermutung
+                    , italian     = Congettura
+                    , portuguese  = Conjetura
+                    , brazilian   = Conjectura
+                    , spanish     = Conjetura
+                    , schinese    = 猜想
+                    , tchinese    = 猜想
+                    , japanese    = 予想
+                    , russian     = Гипотеза
+                  }
+    , crefname =  {
+                    , english     = {Conjecture}{Conjecture}
+                    , french      = [la]{Conjecture}[les]{Conjecture}
+                    , ngerman     = {Vermutung}{Vermutung}
+                    , italian     = [la]{Congettura}[le]{Congettura}
+                    , portuguese  = [a]{Conjetura}[as]{Conjetura}
+                    , brazilian   = [a]{Conjectura}[as]{Conjectura}
+                    , spanish     = [la]{Conjetura}[las]{Conjetura}
+                    , schinese    = {猜想}{猜想}
+                    , tchinese    = {猜想}{猜想}
+                    , japanese    = {予想}{予想}
+                    , russian     = {Гипотеза}{Гипотеза}
+                  }
+    , Crefname =  {
+                    , english     = {Conjecture}{Conjecture}
+                    , french      = [La]{Conjecture}[Les]{Conjecture}
+                    , ngerman     = {Vermutung}{Vermutung}
+                    , italian     = [La]{Congettura}[Le]{Congettura}
+                    , portuguese  = [A]{Conjetura}[As]{Conjetura}
+                    , brazilian   = [A]{Conjectura}[As]{Conjectura}
+                    , spanish     = [La]{Conjetura}[Las]{Conjetura}
+                    , schinese    = {猜想}{猜想}
+                    , tchinese    = {猜想}{猜想}
+                    , japanese    = {予想}{予想}
+                    , russian     = {Гипотеза}{Гипотеза}
+                  }
+  }
+
+\NameTheorem { convention }
+  {
+    , heading =   {
+                    , english     = Convention
+                    , french      = Convention
+                    , ngerman     = Konvention
+                    , italian     = Convenzione
+                    , portuguese  = Convenção
+                    , brazilian   = Convenção
+                    , spanish     = Convención
+                    , schinese    = 约定
+                    , tchinese    = 約定
+                    , japanese    = 慣例
+                    , russian     = Конвенция
+                  }
+    , crefname =  {
+                    , english     = {Convention}{Convention}
+                    , french      = [la]{Convention}[les]{Convention}
+                    , ngerman     = {Konvention}{Konvention}
+                    , italian     = [la]{Convenzione}[le]{Convenzione}
+                    , portuguese  = [a]{Convenção}[as]{Convenção}
+                    , brazilian   = [a]{Convenção}[as]{Convenção}
+                    , spanish     = [la]{Convención}[las]{Convención}
+                    , schinese    = {约定}{约定}
+                    , tchinese    = {約定}{約定}
+                    , japanese    = {慣例}{慣例}
+                    , russian     = {Конвенция}{Конвенция}
+                  }
+    , Crefname =  {
+                    , english     = {Convention}{Convention}
+                    , french      = [La]{Convention}[Les]{Convention}
+                    , ngerman     = {Konvention}{Konvention}
+                    , italian     = [La]{Convenzione}[Le]{Convenzione}
+                    , portuguese  = [A]{Convenção}[As]{Convenção}
+                    , brazilian   = [A]{Convenção}[As]{Convenção}
+                    , spanish     = [La]{Convención}[Las]{Convención}
+                    , schinese    = {约定}{约定}
+                    , tchinese    = {約定}{約定}
+                    , japanese    = {慣例}{慣例}
+                    , russian     = {Конвенция}{Конвенция}
+                  }
+  }
+
+\NameTheorem { corollary }
+  {
+    , heading =   {
+                    , english     = Corollary
+                    , french      = Corollaire
+                    , ngerman     = Korollar
+                    , italian     = Corollario
+                    , portuguese  = Corolário
+                    , brazilian   = Corolário
+                    , spanish     = Corolario
+                    , schinese    = 推论
+                    , tchinese    = 推論
+                    , japanese    = 系
+                    , russian     = Следствие
+                  }
+    , crefname =  {
+                    , english     = {Corollary}{Corollary}
+                    , french      = [le]{Corollaire}[les]{Corollaire}
+                    , ngerman     = {Korollar}{Korollar}
+                    , italian     = [il]{Corollario}[i]{Corollario}
+                    , portuguese  = [o]{Corolário}[os]{Corolário}
+                    , brazilian   = [o]{Corolário}[os]{Corolário}
+                    , spanish     = [el]{Corolario}[los]{Corolario}
+                    , schinese    = {推论}{推论}
+                    , tchinese    = {推論}{推論}
+                    , japanese    = {系}{系}
+                    , russian     = {Следствие}{Следствие}
+                  }
+    , Crefname =  {
+                    , english     = {Corollary}{Corollary}
+                    , french      = [Le]{Corollaire}[Les]{Corollaire}
+                    , ngerman     = {Korollar}{Korollar}
+                    , italian     = [Il]{Corollario}[I]{Corollario}
+                    , portuguese  = [O]{Corolário}[Os]{Corolário}
+                    , brazilian   = [O]{Corolário}[Os]{Corolário}
+                    , spanish     = [El]{Corolario}[Los]{Corolario}
+                    , schinese    = {推论}{推论}
+                    , tchinese    = {推論}{推論}
+                    , japanese    = {系}{系}
+                    , russian     = {Следствие}{Следствие}
+                  }
+  }
+
+\NameTheorem { definition }
+  {
+    , heading =   {
+                    , english     = Definition
+                    , french      = Définition
+                    , ngerman     = Definition
+                    , italian     = Definizione
+                    , portuguese  = Definição
+                    , brazilian   = Definição
+                    , spanish     = Definición
+                    , schinese    = 定义
+                    , tchinese    = 定義
+                    , japanese    = 定義
+                    , russian     = Определение
+                  }
+    , crefname =  {
+                    , english     = {Definition}{Definition}
+                    , french      = [la]{Définition}[les]{Définition}
+                    , ngerman     = {Definition}{Definition}
+                    , italian     = [la]{Definizione}[le]{Definizione}
+                    , portuguese  = [a]{Definição}[as]{Definição}
+                    , brazilian   = [a]{Definição}[as]{Definição}
+                    , spanish     = [la]{Definición}[las]{Definición}
+                    , schinese    = {定义}{定义}
+                    , tchinese    = {定義}{定義}
+                    , japanese    = {定義}{定義}
+                    , russian     = {Определение}{Определение}
+                  }
+    , Crefname =  {
+                    , english     = {Definition}{Definition}
+                    , french      = [La]{Définition}[Les]{Définition}
+                    , ngerman     = {Definition}{Definition}
+                    , italian     = [La]{Definizione}[Le]{Definizione}
+                    , portuguese  = [A]{Definição}[As]{Definição}
+                    , brazilian   = [A]{Definição}[As]{Definição}
+                    , spanish     = [La]{Definición}[Las]{Definición}
+                    , schinese    = {定义}{定义}
+                    , tchinese    = {定義}{定義}
+                    , japanese    = {定義}{定義}
+                    , russian     = {Определение}{Определение}
+                  }
+  }
+
+\NameTheorem { example }
+  {
+    , heading =   {
+                    , english     = Example
+                    , french      = Exemple
+                    , ngerman     = Beispiel
+                    , italian     = Esempio
+                    , portuguese  = Exemplo
+                    , brazilian   = Exemplo
+                    , spanish     = Ejemplo
+                    , schinese    = 例
+                    , tchinese    = 例
+                    , japanese    = 例
+                    , russian     = Пример
+                  }
+    , crefname =  {
+                    , english     = {Example}{Example}
+                    , french      = [l']{Example}[les]{Example}
+                    , ngerman     = {Beispiel}{Beispiel}
+                    , italian     = [l']{Esempio}[gli]{Esempio}
+                    , portuguese  = [o]{Exemplo}[os]{Exemplo}
+                    , brazilian   = [o]{Exemplo}[os]{Exemplo}
+                    , spanish     = [el]{Ejemplo}[los]{Ejemplo}
+                    , schinese    = {例}{例}
+                    , tchinese    = {例}{例}
+                    , japanese    = {例}{例}
+                    , russian     = {Пример}{Пример}
+                  }
+    , Crefname =  {
+                    , english     = {Example}{Example}
+                    , french      = [L']{Example}[Les]{Example}
+                    , ngerman     = {Beispiel}{Beispiel}
+                    , italian     = [L']{Esempio}[Gli]{Esempio}
+                    , portuguese  = [O]{Exemplo}[Os]{Exemplo}
+                    , brazilian   = [O]{Exemplo}[Os]{Exemplo}
+                    , spanish     = [El]{Ejemplo}[Los]{Ejemplo}
+                    , schinese    = {例}{例}
+                    , tchinese    = {例}{例}
+                    , japanese    = {例}{例}
+                    , russian     = {Пример}{Пример}
+                  }
+  }
+
+\NameTheorem { exercise }
+  {
+    , heading =   {
+                    , english     = Exercise
+                    , french      = Exercice
+                    , ngerman     = Übung
+                    , italian     = Esercizio
+                    , portuguese  = Exercício
+                    , brazilian   = Exercício
+                    , spanish     = Ejercicio
+                    , schinese    = 练习
+                    , tchinese    = 練習
+                    , japanese    = 練習
+                    , russian     = Упражнение
+                  }
+    , crefname =  {
+                    , english     = {Exercise}{Exercise}
+                    , french      = [l']{Exercice}[les]{Exercice}
+                    , ngerman     = {Übung}{Übung}
+                    , italian     = [l']{Esercizio}[gli]{Esercizio}
+                    , portuguese  = [o]{Exercício}[os]{Exercício}
+                    , brazilian   = [o]{Exercício}[os]{Exercício}
+                    , spanish     = [el]{Ejercicio}[los]{Ejercicio}
+                    , schinese    = {练习}{练习}
+                    , tchinese    = {練習}{練習}
+                    , japanese    = {練習}{練習}
+                    , russian     = {Упражнение}{Упражнение}
+                  }
+    , Crefname =  {
+                    , english     = {Exercise}{Exercise}
+                    , french      = [L']{Exercice}[Les]{Exercice}
+                    , ngerman     = {Übung}{Übung}
+                    , italian     = [L']{Esercizio}[Gli]{Esercizio}
+                    , portuguese  = [O]{Exercício}[Os]{Exercício}
+                    , brazilian   = [O]{Exercício}[Os]{Exercício}
+                    , spanish     = [El]{Ejercicio}[Los]{Ejercicio}
+                    , schinese    = {练习}{练习}
+                    , tchinese    = {練習}{練習}
+                    , japanese    = {練習}{練習}
+                    , russian     = {Упражнение}{Упражнение}
+                  }
+  }
+
+\NameTheorem { fact }
+  {
+    , heading =   {
+                    , english     = Fact
+                    , french      = Fait
+                    , ngerman     = Fakt
+                    , italian     = Fatto
+                    , portuguese  = Facto
+                    , brazilian   = Fato
+                    , spanish     = Hecho
+                    , schinese    = 事实
+                    , tchinese    = 事實
+                    , japanese    = 事実
+                    , russian     = Факт
+                  }
+    , crefname =  {
+                    , english     = {Fact}{Fact}
+                    , french      = [le]{Fait}[les]{Fait}
+                    , ngerman     = {Fakt}{Fakt}
+                    , italian     = [il]{Fatto}[i]{Fatto}
+                    , portuguese  = [o]{Facto}[os]{Facto}
+                    , brazilian   = [o]{Fato}[os]{Fato}
+                    , spanish     = [el]{Hecho}[los]{Hecho}
+                    , schinese    = {事实}{事实}
+                    , tchinese    = {事實}{事實}
+                    , japanese    = {事実}{事実}
+                    , russian     = {Факт}{Факт}
+                  }
+    , Crefname =  {
+                    , english     = {Fact}{Fact}
+                    , french      = [Le]{Fait}[Les]{Fait}
+                    , ngerman     = {Fakt}{Fakt}
+                    , italian     = [Il]{Fatto}[I]{Fatto}
+                    , portuguese  = [O]{Facto}[Os]{Facto}
+                    , brazilian   = [O]{Fato}[Os]{Fato}
+                    , spanish     = [El]{Hecho}[Los]{Hecho}
+                    , schinese    = {事实}{事实}
+                    , tchinese    = {事實}{事實}
+                    , japanese    = {事実}{事実}
+                    , russian     = {Факт}{Факт}
+                  }
+  }
+
+\NameTheorem { hypothesis }
+  {
+    , heading =   {
+                    , english     = Hypothesis
+                    , french      = Hypothèse
+                    , ngerman     = Hypothese
+                    , italian     = Ipotesi
+                    , portuguese  = Hipótese
+                    , brazilian   = Hipótese
+                    , spanish     = Hipótesis
+                    , schinese    = 假设
+                    , tchinese    = 假設
+                    , japanese    = 仮設
+                    , russian     = Гипотеза
+                  }
+    , crefname =  {
+                    , english     = {Hypothesis}{Hypothesis}
+                    , french      = [l']{Hypothèse}[les]{Hypothèse}
+                    , ngerman     = {Hypothese}{Hypothese}
+                    , italian     = [l']{Ipotesi}[le]{Ipotesi}
+                    , portuguese  = [a]{Hipótese}[as]{Hipótese}
+                    , brazilian   = [a]{Hipótese}[as]{Hipótese}
+                    , spanish     = [la]{Hipótesis}[las]{Hipótesis}
+                    , schinese    = {假设}{假设}
+                    , tchinese    = {假設}{假設}
+                    , japanese    = {仮設}{仮設}
+                    , russian     = {Гипотеза}{Гипотеза}
+                  }
+    , Crefname =  {
+                    , english     = {Hypothesis}{Hypothesis}
+                    , french      = [L']{Hypothèse}[Les]{Hypothèse}
+                    , ngerman     = {Hypothese}{Hypothese}
+                    , italian     = [L']{Ipotesi}[Le]{Ipotesi}
+                    , portuguese  = [A]{Hipótese}[As]{Hipótese}
+                    , brazilian   = [A]{Hipótese}[As]{Hipótese}
+                    , spanish     = [La]{Hipótesis}[Las]{Hipótesis}
+                    , schinese    = {假设}{假设}
+                    , tchinese    = {假設}{假設}
+                    , japanese    = {仮設}{仮設}
+                    , russian     = {Гипотеза}{Гипотеза}
+                  }
+  }
+
+\NameTheorem { lemma }
+  {
+    , heading   = {
+                    , english     = Lemma
+                    , french      = Lemme
+                    , ngerman     = Lemma
+                    , italian     = Lemma
+                    , portuguese  = Lema
+                    , brazilian   = Lema
+                    , spanish     = Lema
+                    , schinese    = 引理
+                    , tchinese    = 引理
+                    , japanese    = 補題
+                    , russian     = Лемма
+                  }
+    , crefname  = {
+                    , english     = {Lemma}{Lemma}
+                    , french      = [le]{Lemme}[les]{Lemme}
+                    , ngerman     = {Lemma}{Lemma}
+                    , italian     = [il]{Lemma}[i]{Lemma}
+                    , portuguese  = [o]{Lema}[os]{Lema}
+                    , brazilian   = [o]{Lema}[os]{Lema}
+                    , spanish     = [el]{Lema}[las]{Lema}
+                    , schinese    = {引理}{引理}
+                    , tchinese    = {引理}{引理}
+                    , japanese    = {補題}{補題}
+                    , russian     = {Лемма}{Лемма}
+                  }
+    , Crefname  = {
+                    , english     = {Lemma}{Lemma}
+                    , french      = [Le]{Lemme}[Les]{Lemme}
+                    , ngerman     = {Lemma}{Lemma}
+                    , italian     = [Il]{Lemma}[I]{Lemma}
+                    , portuguese  = [O]{Lema}[Os]{Lema}
+                    , brazilian   = [O]{Lema}[Os]{Lema}
+                    , spanish     = [el]{Lema}[las]{Lema}
+                    , schinese    = {引理}{引理}
+                    , tchinese    = {引理}{引理}
+                    , japanese    = {補題}{補題}
+                    , russian     = {Лемма}{Лемма}
+                  }
+  }
+
+\NameTheorem { notation }
+  {
+    , heading =   {
+                    , english     = Notation
+                    , french      = Notation
+                    , ngerman     = Notation
+                    , italian     = Notazione
+                    , portuguese  = Notação
+                    , brazilian   = Notação
+                    , spanish     = Notación
+                    , schinese    = 记号
+                    , tchinese    = 記號
+                    , japanese    = 記法
+                    , russian     = Нотация
+                  }
+    , crefname =  {
+                    , english     = {Notation}{Notation}
+                    , french      = [la]{Notation}[les]{Notation}
+                    , ngerman     = {Notation}{Notation}
+                    , italian     = [la]{Notazione}[le]{Notazione}
+                    , portuguese  = [a]{Notação}[as]{Notação}
+                    , brazilian   = [a]{Notação}[as]{Notação}
+                    , spanish     = [la]{Notación}[las]{Notación}
+                    , schinese    = {记号}{记号}
+                    , tchinese    = {記號}{記號}
+                    , japanese    = {記法}{記法}
+                    , russian     = {Нотация}{Нотация}
+                  }
+    , Crefname =  {
+                    , english     = {Notation}{Notation}
+                    , french      = [La]{Notation}[Les]{Notation}
+                    , ngerman     = {Notation}{Notation}
+                    , italian     = [La]{Notazione}[Le]{Notazione}
+                    , portuguese  = [A]{Notação}[As]{Notação}
+                    , brazilian   = [A]{Notação}[As]{Notação}
+                    , spanish     = [La]{Notación}[Las]{Notación}
+                    , schinese    = {记号}{记号}
+                    , tchinese    = {記號}{記號}
+                    , japanese    = {記法}{記法}
+                    , russian     = {Нотация}{Нотация}
+                  }
+  }
+
+\NameTheorem { observation }
+  {
+    , heading =   {
+                    , english     = Observation
+                    , french      = Observation
+                    , ngerman     = Beobachtung
+                    , italian     = Osservazione
+                    , portuguese  = Observação
+                    , brazilian   = Observação
+                    , spanish     = Observación
+                    , schinese    = 观察
+                    , tchinese    = 觀察
+                    , japanese    = 観察
+                    , russian     = Наблюдение
+                  }
+    , crefname =  {
+                    , english     = {Observation}{Observation}
+                    , french      = [la]{Observation}[les]{Observation}
+                    , ngerman     = {Beobachtung}{Beobachtung}
+                    , italian     = [l']{Osservazione}[le]{Osservazione}
+                    , portuguese  = [a]{Observação}[as]{Observação}
+                    , brazilian   = [a]{Observação}[as]{Observação}
+                    , spanish     = [la]{Observación}[las]{Observación}
+                    , schinese    = {观察}{观察}
+                    , tchinese    = {觀察}{觀察}
+                    , japanese    = {観察}{観察}
+                    , russian     = {Наблюдение}{Наблюдение}
+                  }
+    , Crefname =  {
+                    , english     = {Observation}{Observation}
+                    , french      = [La]{Observation}[Les]{Observation}
+                    , ngerman     = {Beobachtung}{Beobachtung}
+                    , italian     = [L']{Osservazione}[Le]{Osservazione}
+                    , portuguese  = [A]{Observação}[As]{Observação}
+                    , brazilian   = [A]{Observação}[As]{Observação}
+                    , spanish     = [La]{Observación}[Las]{Observación}
+                    , schinese    = {观察}{观察}
+                    , tchinese    = {觀察}{觀察}
+                    , japanese    = {観察}{観察}
+                    , russian     = {Наблюдение}{Наблюдение}
+                  }
+  }
+
+\NameTheorem { postulate }
+  {
+    , heading =   {
+                    , english     = Postulate
+                    , french      = Postulat
+                    , ngerman     = Postulat
+                    , italian     = Postulato
+                    , portuguese  = Postulado
+                    , brazilian   = Postulado
+                    , spanish     = Postulado
+                    , schinese    = 公设
+                    , tchinese    = 公設
+                    , japanese    = 公準
+                    , russian     = Постулат
+                  }
+    , crefname =  {
+                    , english     = {Postulate}{Postulate}
+                    , french      = [le]{Postulat}[les]{Postulat}
+                    , ngerman     = {Postulat}{Postulat}
+                    , italian     = [il]{Postulato}[i]{Postulato}
+                    , portuguese  = [o]{Postulado}[os]{Postulado}
+                    , brazilian   = [o]{Postulado}[os]{Postulado}
+                    , spanish     = [el]{Postulado}[los]{Postulado}
+                    , schinese    = {公设}{公设}
+                    , tchinese    = {公設}{公設}
+                    , japanese    = {公準}{公準}
+                    , russian     = {Постулат}{Постулат}
+                  }
+    , Crefname =  {
+                    , english     = {Postulate}{Postulate}
+                    , french      = [Le]{Postulat}[Les]{Postulat}
+                    , ngerman     = {Postulat}{Postulat}
+                    , italian     = [Il]{Postulato}[I]{Postulato}
+                    , portuguese  = [O]{Postulado}[Os]{Postulado}
+                    , brazilian   = [O]{Postulado}[Os]{Postulado}
+                    , spanish     = [El]{Postulado}[Los]{Postulado}
+                    , schinese    = {公设}{公设}
+                    , tchinese    = {公設}{公設}
+                    , japanese    = {公準}{公準}
+                    , russian     = {Постулат}{Постулат}
+                  }
+  }
+
+\NameTheorem { problem }
+  {
+    , heading =   {
+                    , english     = Problem
+                    , french      = Problème
+                    , ngerman     = Problem
+                    , italian     = Problema
+                    , portuguese  = Problema
+                    , brazilian   = Problema
+                    , spanish     = Problema
+                    , schinese    = 问题
+                    , tchinese    = 問題
+                    , japanese    = 問題
+                    , russian     = Проблема
+                  }
+    , crefname =  {
+                    , english     = {Problem}{Problem}
+                    , french      = [le]{Problème}[les]{Problème}
+                    , ngerman     = {Problem}{Problem}
+                    , italian     = [il]{Problema}[i]{Problema}
+                    , portuguese  = [o]{Problema}[os]{Problema}
+                    , brazilian   = [o]{Problema}[os]{Problema}
+                    , spanish     = [el]{Problema}[los]{Problema}
+                    , schinese    = {问题}{问题}
+                    , tchinese    = {問題}{問題}
+                    , japanese    = {問題}{問題}
+                    , russian     = {Проблема}{Проблема}
+                  }
+    , Crefname =  {
+                    , english     = {Problem}{Problem}
+                    , french      = [Le]{Problème}[Les]{Problème}
+                    , ngerman     = {Problem}{Problem}
+                    , italian     = [Il]{Problema}[I]{Problema}
+                    , portuguese  = [O]{Problema}[Os]{Problema}
+                    , brazilian   = [O]{Problema}[Os]{Problema}
+                    , spanish     = [El]{Problema}[Los]{Problema}
+                    , schinese    = {问题}{问题}
+                    , tchinese    = {問題}{問題}
+                    , japanese    = {問題}{問題}
+                    , russian     = {Проблема}{Проблема}
+                  }
+  }
+
+\NameTheorem { property }
+  {
+    , heading =   {
+                    , english     = Property
+                    , french      = Propriété
+                    , ngerman     = Eigenschaft
+                    , italian     = Proprietà
+                    , portuguese  = Propriedade
+                    , brazilian   = Propriedade
+                    , spanish     = Propiedad
+                    , schinese    = 性质
+                    , tchinese    = 性質
+                    , japanese    = 性質
+                    , russian     = Имущество
+                  }
+    , crefname =  {
+                    , english     = {Property}{Property}
+                    , french      = [la]{Propriété}[les]{Propriété}
+                    , ngerman     = {Eigenschaft}{Eigenschaft}
+                    , italian     = [la]{Proprietà}[le]{Proprietà}
+                    , portuguese  = [a]{Propriedade}[as]{Propriedade}
+                    , brazilian   = [a]{Propriedade}[as]{Propriedade}
+                    , spanish     = [la]{Propiedad}[las]{Propiedad}
+                    , schinese    = {性质}{性质}
+                    , tchinese    = {性質}{性質}
+                    , japanese    = {性質}{性質}
+                    , russian     = {Имущество}{Имущество}
+                  }
+    , Crefname =  {
+                    , english     = {Property}{Property}
+                    , french      = [La]{Propriété}[Les]{Propriété}
+                    , ngerman     = {Eigenschaft}{Eigenschaft}
+                    , italian     = [La]{Proprietà}[Le]{Proprietà}
+                    , portuguese  = [A]{Propriedade}[As]{Propriedade}
+                    , brazilian   = [A]{Propriedade}[As]{Propriedade}
+                    , spanish     = [La]{Propiedad}[Las]{Propiedad}
+                    , schinese    = {性质}{性质}
+                    , tchinese    = {性質}{性質}
+                    , japanese    = {性質}{性質}
+                    , russian     = {Имущество}{Имущество}
+                  }
+  }
+
+\NameTheorem { proposition }
+  {
+    , heading =   {
+                    , english     = Proposition
+                    , french      = Proposition
+                    , ngerman     = Proposition
+                    , italian     = Proposizione
+                    , portuguese  = Proposição
+                    , brazilian   = Proposição
+                    , spanish     = Proposición
+                    , schinese    = 命题
+                    , tchinese    = 命題
+                    , japanese    = 命題
+                    , russian     = Предложение
+                  }
+    , crefname =  {
+                    , english     = {Proposition}{Proposition}
+                    , french      = [la]{Proposition}[les]{Proposition}
+                    , ngerman     = {Proposition}{Proposition}
+                    , italian     = [la]{Proposizione}[le]{Proposizione}
+                    , portuguese  = [a]{Proposição}[as]{Proposição}
+                    , brazilian   = [a]{Proposição}[as]{Proposição}
+                    , spanish     = [la]{Proposición}[las]{Proposición}
+                    , schinese    = {命题}{命题}
+                    , tchinese    = {命題}{命題}
+                    , japanese    = {命題}{命題}
+                    , russian     = {Предложение}{Предложение}
+                  }
+    , Crefname =  {
+                    , english     = {Proposition}{Proposition}
+                    , french      = [La]{Proposition}[Les]{Proposition}
+                    , ngerman     = {Proposition}{Proposition}
+                    , italian     = [La]{Proposizione}[Le]{Proposizione}
+                    , portuguese  = [A]{Proposição}[As]{Proposição}
+                    , brazilian   = [A]{Proposição}[As]{Proposição}
+                    , spanish     = [La]{Proposición}[Las]{Proposición}
+                    , schinese    = {命题}{命题}
+                    , tchinese    = {命題}{命題}
+                    , japanese    = {命題}{命題}
+                    , russian     = {Предложение}{Предложение}
+                  }
+  }
+
+\NameTheorem { question }
+  {
+    , heading =   {
+                    , english     = Question
+                    , french      = Question
+                    , ngerman     = Frage
+                    , italian     = Domanda
+                    , portuguese  = Pergunta
+                    , brazilian   = Pergunta
+                    , spanish     = Pregunta
+                    , schinese    = 问题
+                    , tchinese    = 問題
+                    , japanese    = 問題
+                    , russian     = Вопрос
+                  }
+    , crefname =  {
+                    , english     = {Question}{Question}
+                    , french      = [la]{Question}[les]{Question}
+                    , ngerman     = {Frage}{Frage}
+                    , italian     = [la]{Domanda}[le]{Domanda}
+                    , portuguese  = [a]{Pergunta}[as]{Pergunta}
+                    , brazilian   = [a]{Pergunta}[as]{Pergunta}
+                    , spanish     = [la]{Pregunta}[las]{Pregunta}
+                    , schinese    = {问题}{问题}
+                    , tchinese    = {問題}{問題}
+                    , japanese    = {問題}{問題}
+                    , russian     = {Вопрос}{Вопрос}
+                  }
+    , Crefname =  {
+                    , english     = {Question}{Question}
+                    , french      = [La]{Question}[Les]{Question}
+                    , ngerman     = {Frage}{Frage}
+                    , italian     = [La]{Domanda}[Le]{Domanda}
+                    , portuguese  = [A]{Pergunta}[As]{Pergunta}
+                    , brazilian   = [A]{Pergunta}[As]{Pergunta}
+                    , spanish     = [La]{Pregunta}[Las]{Pregunta}
+                    , schinese    = {问题}{问题}
+                    , tchinese    = {問題}{問題}
+                    , japanese    = {問題}{問題}
+                    , russian     = {Вопрос}{Вопрос}
+                  }
+  }
+
+\NameTheorem { remark }
+  {
+    , heading =   {
+                    , english     = Remark
+                    , french      = Remarque
+                    , ngerman     = Bemerkung
+                    , italian     = Commento
+                    , portuguese  = Comentário
+                    , brazilian   = Comentário
+                    , spanish     = Comentario
+                    , schinese    = 备注
+                    , tchinese    = 備註
+                    , japanese    = 注釈
+                    , russian     = Замечание
+                  }
+    , crefname =  {
+                    , english     = {Remark}{Remark}
+                    , french      = [la]{Remarque}[les]{Remarque}
+                    , ngerman     = {Bemerkung}{Bemerkung}
+                    , italian     = [il]{Commento}[i]{Commento}
+                    , portuguese  = [o]{Comentário}[os]{Comentário}
+                    , brazilian   = [o]{Comentário}[os]{Comentário}
+                    , spanish     = [el]{Comentario}[los]{Comentario}
+                    , schinese    = {备注}{备注}
+                    , tchinese    = {備註}{備註}
+                    , japanese    = {注釈}{注釈}
+                    , russian     = {Замечание}{Замечание}
+                  }
+    , Crefname =  {
+                    , english     = {Remark}{Remark}
+                    , french      = [La]{Remarque}[Les]{Remarque}
+                    , ngerman     = {Bemerkung}{Bemerkung}
+                    , italian     = [Il]{Commento}[I]{Commento}
+                    , portuguese  = [O]{Comentário}[Os]{Comentário}
+                    , brazilian   = [O]{Comentário}[Os]{Comentário}
+                    , spanish     = [El]{Comentario}[Los]{Comentario}
+                    , schinese    = {备注}{备注}
+                    , tchinese    = {備註}{備註}
+                    , japanese    = {注釈}{注釈}
+                    , russian     = {Замечание}{Замечание}
+                  }
+  }
+
+\NameTheorem { theorem }
+  {
+    , heading =   {
+                    , english     = Theorem
+                    , french      = Théorème
+                    , ngerman     = Satz
+                    , italian     = Teorema
+                    , portuguese  = Teorema
+                    , brazilian   = Teorema
+                    , spanish     = Teorema
+                    , schinese    = 定理
+                    , tchinese    = 定理
+                    , japanese    = 定理
+                    , russian     = Теорема
+                  }
+    , crefname =  {
+                    , english     = {Theorem}{Theorem}
+                    , french      = [le]{Théorème}[les]{Théorème}
+                    , ngerman     = {Satz}{Satz}
+                    , italian     = [il]{Teorema}[i]{Teorema}
+                    , portuguese  = [o]{Teorema}[os]{Teorema}
+                    , brazilian   = [o]{Teorema}[os]{Teorema}
+                    , spanish     = [el]{Teorema}[los]{Teorema}
+                    , schinese    = {定理}{定理}
+                    , tchinese    = {定理}{定理}
+                    , japanese    = {定理}{定理}
+                    , russian     = {Теорема}{Теорема}
+                  }
+    , Crefname =  {
+                    , english     = {Theorem}{Theorem}
+                    , french      = [Le]{Théorème}[Les]{Théorème}
+                    , ngerman     = {Satz}{Satz}
+                    , italian     = [Il]{Teorema}[I]{Teorema}
+                    , portuguese  = [O]{Teorema}[Os]{Teorema}
+                    , brazilian   = [O]{Teorema}[Os]{Teorema}
+                    , spanish     = [El]{Teorema}[Los]{Teorema}
+                    , schinese    = {定理}{定理}
+                    , tchinese    = {定理}{定理}
+                    , japanese    = {定理}{定理}
+                    , russian     = {Теорема}{Теорема}
+                  }
+  }
+
+\NameTheorem { definition-proposition }
+  {
+    , heading =   {
+                    , english     = Definition-Proposition
+                    , french      = Définition-Proposition
+                    , ngerman     = Definition-Proposition
+                    , italian     = Definizione-Proposizione
+                    , portuguese  = Definição-Proposição
+                    , brazilian   = Definição-Proposição
+                    , spanish     = Definición-Proposición
+                    , schinese    = 定义-命题
+                    , tchinese    = 定義-命題
+                    , japanese    = 定義-命題
+                    , russian     = Определение-Предложение
+                  }
+    , crefname =  {
+                    , english     = {Definition-Proposition}{Definition-Proposition}
+                    , french      = [la]{Définition-Proposition}[les]{Définition-Proposition}
+                    , ngerman     = {Definition-Proposition}{Definition-Proposition}
+                    , italian     = [la]{Definizione-Proposizione}[le]{Definizione-Proposizione}
+                    , portuguese  = [a]{Definição-Proposição}[as]{Definição-Proposição}
+                    , brazilian   = [a]{Definição-Proposição}[as]{Definição-Proposição}
+                    , spanish     = [la]{Definición-Proposición}[las]{Definición-Proposición}
+                    , schinese    = {定义-命题}{定义-命题}
+                    , tchinese    = {定義-命題}{定義-命題}
+                    , japanese    = {定義-命題}{定義-命題}
+                    , russian     = {Определение-Предложение}{Определение-Предложение}
+                  }
+    , Crefname =  {
+                    , english     = {Definition-Proposition}{Definition-Proposition}
+                    , french      = [La]{Définition-Proposition}[Les]{Définition-Proposition}
+                    , ngerman     = {Definition-Proposition}{Definition-Proposition}
+                    , italian     = [La]{Definizione-Proposizione}[Le]{Definizione-Proposizione}
+                    , portuguese  = [A]{Definição-Proposição}[As]{Definição-Proposição}
+                    , brazilian   = [A]{Definição-Proposição}[As]{Definição-Proposição}
+                    , spanish     = [La]{Definición-Proposición}[Las]{Definición-Proposición}
+                    , schinese    = {定义-命题}{定义-命题}
+                    , tchinese    = {定義-命題}{定義-命題}
+                    , japanese    = {定義-命題}{定義-命題}
+                    , russian     = {Определение-Предложение}{Определение-Предложение}
+                  }
+  }
+
+\NameTheorem { definition-theorem }
+  {
+    , heading =   {
+                    , english     = Definition-Theorem
+                    , french      = Définition-Théorème
+                    , ngerman     = Definition-Satz
+                    , italian     = Definizione-Teorema
+                    , portuguese  = Definição-Teorema
+                    , brazilian   = Definição-Teorema
+                    , spanish     = Definición-Teorema
+                    , schinese    = 定义-定理
+                    , tchinese    = 定義-定理
+                    , japanese    = 定義-定理
+                    , russian     = Определение-Теорема
+                  }
+    , crefname =  {
+                    , english     = {Definition-Theorem}{Definition-Theorem}
+                    , french      = [la]{Définition-Théorème}[les]{Définition-Théorème}
+                    , ngerman     = {Definition-Satz}{Definition-Satz}
+                    , italian     = [la]{Definizione-Teorema}[le]{Definizione-Teorema}
+                    , portuguese  = [a]{Definição-Teorema}[as]{Definição-Teorema}
+                    , brazilian   = [a]{Definição-Teorema}[as]{Definição-Teorema}
+                    , spanish     = [la]{Definición-Teorema}[las]{Definición-Teorema}
+                    , schinese    = {定义-定理}{定义-定理}
+                    , tchinese    = {定義-定理}{定義-定理}
+                    , japanese    = {定義-定理}{定義-定理}
+                    , russian     = {Определение-Теорема}{Определение-Теорема}
+                  }
+    , Crefname =  {
+                    , english     = {Definition-Theorem}{Definition-Theorem}
+                    , french      = [La]{Définition-Théorème}[Les]{Définition-Théorème}
+                    , ngerman     = {Definition-Satz}{Definition-Satz}
+                    , italian     = [La]{Definizione-Teorema}[Le]{Definizione-Teorema}
+                    , portuguese  = [A]{Definição-Teorema}[As]{Definição-Teorema}
+                    , brazilian   = [A]{Definição-Teorema}[As]{Definição-Teorema}
+                    , spanish     = [La]{Definición-Teorema}[Las]{Definición-Teorema}
+                    , schinese    = {定义-定理}{定义-定理}
+                    , tchinese    = {定義-定理}{定義-定理}
+                    , japanese    = {定義-定理}{定義-定理}
+                    , russian     = {Определение-Теорема}{Определение-Теорема}
+                  }
+  }
+%</projlib-theorem>
+
+\endinput
\ No newline at end of file
diff --git a/Master/texmf-dist/source/latex/projlib/ProjLib.ins b/Master/texmf-dist/source/latex/projlib/ProjLib.ins
new file mode 100644
index 00000000000..ca73cff4465
--- /dev/null
+++ b/Master/texmf-dist/source/latex/projlib/ProjLib.ins
@@ -0,0 +1,74 @@
+%%
+%% Copyright (C) 2021-2022 by Jinwen XU
+%%
+%% This file may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License, either version 1.3c of this license
+%% or (at your option) any later version.  The latest version of this
+%% license is in:
+%%
+%%    http://www.latex-project.org/lppl.txt
+%%
+
+\input docstrip.tex
+\keepsilent
+\askforoverwritefalse
+
+\begingroup
+\catcode`\^^M=\active%
+\obeyspaces%
+\gdef\copyright{%
+\ds@heading% This is file... generated with the docstrip utility.
+
+Copyright (C) 2021-2022 by Jinwen XU
+
+This is part of the ProjLib Toolkit.
+}%
+\gdef\lppllicense{%
+
+This work may be distributed and/or modified under the conditions of the
+LaTeX Project Public License, either version 1.3c of this license or (at
+your option) any later version. The latest version of this license is in
+
+    http://www.latex-project.org/lppl.txt
+
+and version 1.3c or later is part of all distributions of LaTeX version
+2005/12/01 or later.
+}%
+\endgroup
+
+\def\mypreamble{\copyright\lppllicense}
+\usepreamble\mypreamble
+
+\generate{\file{ProjLib.sty}{\from{ProjLib.dtx}{ProjLib}}}
+\generate{\file{projlib-author.sty}{\from{ProjLib.dtx}{projlib-author}}}
+\generate{\file{projlib-datetime.sty}{\from{ProjLib.dtx}{projlib-datetime}}}
+\generate{\file{projlib-draft.sty}{\from{ProjLib.dtx}{projlib-draft}}}
+\generate{\file{projlib-font.sty}{\from{ProjLib.dtx}{projlib-font}}}
+\generate{\file{projlib-language.sty}{\from{ProjLib.dtx}{projlib-language}}}
+\generate{\file{projlib-logo.sty}{\from{ProjLib.dtx}{projlib-logo}}}
+\generate{\file{projlib-math.sty}{\from{ProjLib.dtx}{projlib-math}}}
+\generate{\file{projlib-paper.sty}{\from{ProjLib.dtx}{projlib-paper}}}
+\generate{\file{projlib-theorem.sty}{\from{ProjLib.dtx}{projlib-theorem}}}
+
+\obeyspaces
+\Msg{*************************************************************}
+\Msg{*                                                           *}
+\Msg{* To finish the installation you have to move the following *}
+\Msg{* files into a directory searched by TeX:                   *}
+\Msg{*                                                           *}
+\Msg{*     ProjLib.sty                                           *}
+\Msg{*     projlib-author.sty                                    *}
+\Msg{*     projlib-datetime.sty                                  *}
+\Msg{*     projlib-draft.sty                                     *}
+\Msg{*     projlib-font.sty                                      *}
+\Msg{*     projlib-language.sty                                  *}
+\Msg{*     projlib-logo.sty                                      *}
+\Msg{*     projlib-math.sty                                      *}
+\Msg{*     projlib-paper.sty                                     *}
+\Msg{*     projlib-theorem.sty                                   *}
+\Msg{*                                                           *}
+\Msg{* Happy TeXing!                                             *}
+\Msg{*                                                           *}
+\Msg{*************************************************************}
+
+\endbatchfile
diff --git a/Master/texmf-dist/tex/latex/projlib/ProjLib.sty b/Master/texmf-dist/tex/latex/projlib/ProjLib.sty
index 0e0cdd3666c..cf262b3fe19 100644
--- a/Master/texmf-dist/tex/latex/projlib/ProjLib.sty
+++ b/Master/texmf-dist/tex/latex/projlib/ProjLib.sty
@@ -1,29 +1,64 @@
+%%
+%% This is file `ProjLib.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {ProjLib}
-  {2022/03/09} {}
+  {2022/03/11} {}
   {Collective interface of the ProjLib toolkit}
 
 \keys_define:nn { ProjLib }
   {
-    , unknown .code:n = {
-                          \PassOptionsToPackage { \CurrentOption } { projlib-language }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-author }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-datetime }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-draft }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-font }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-logo }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-math }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-paper }
-                          \PassOptionsToPackage { \CurrentOption } { projlib-theorem }
-                        }
+    , author          .bool_set:N         = \l__projlib_main_author_bool
+    , author          .initial:n          = { false }
+    , author-block    .bool_set:N         = \l__projlib_main_author_bool
+    , author~block    .bool_set:N         = \l__projlib_main_author_bool
+    , author block    .bool_set:N         = \l__projlib_main_author_bool
+    , ams-fashion     .bool_set:N         = \l__projlib_main_amsfashion_bool
+    , ams-fashion     .initial:n          = { false }
+    , ams~fashion     .bool_set:N         = \l__projlib_main_amsfashion_bool
+    , ams fashion     .bool_set:N         = \l__projlib_main_amsfashion_bool
+    , unknown         .code:n             = {
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-language }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-author }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-datetime }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-draft }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-font }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-logo }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-math }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-paper }
+                                              \PassOptionsToPackage { \CurrentOption } { projlib-theorem }
+                                            }
   }
 \ProcessKeysOptions { ProjLib }
 
+\bool_if:NT \l__projlib_main_amsfashion_bool
+  {
+    \bool_set_true:N \l__projlib_main_author_bool
+    \PassOptionsToPackage { amsfashion } { projlib-author }
+  }
+
 \RequirePackage { projlib-language }
 
-\RequirePackage { projlib-author }
+\bool_if:NT \l__projlib_main_author_bool
+  {
+    \RequirePackage { projlib-author }
+  }
 \RequirePackage { projlib-datetime }
 \RequirePackage { projlib-draft }
 \RequirePackage { projlib-font }
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-author.sty b/Master/texmf-dist/tex/latex/projlib/projlib-author.sty
index 2ad44ff6a3e..e3929df4e51 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-author.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-author.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-author.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-author}
-  {2022/03/09} {}
+  {2022/03/11} {}
   {Enhanced author information block}
 
 \keys_define:nn { projlib-author }
@@ -35,7 +52,6 @@
 \dim_set:Nn \g__projlib_author_length_sep_dim      { 0.5 \baselineskip }
 \dim_set:Nn \g__projlib_author_length_aftersep_dim { 0.3 \baselineskip }
 
-
 \bool_new:N \g__projlib_author_affil_already_exist_bool
 
 \NewCommandCopy \projlib_author_backup_author:w \author
@@ -98,8 +114,9 @@
 
 \RequirePackage { regexpatch }
 
-\xpatchcmd { \@maketitle } { \begin{tabular}[t]{c} } {} {} { \FAIL }
-\xpatchcmd { \@maketitle } { \end{tabular} } {} {} { \FAIL }
+\xpatchcmd { \@maketitle } { \begin{tabular}[t]{c} } {} {
+  \xpatchcmd { \@maketitle } { \end{tabular} } {} {} {}
+} {}
 
 \tl_set:cn {@author} {}
 
@@ -176,7 +193,7 @@
 
         \NewDocumentCommand \thanks { m }
           {
-            \tl_if_blank:eF { #1 }
+            \tl_if_blank:nF { #1 }
               {
                 \hook_gput_code:nnn { cmd/@title/after } { projlib-author }
                   {
@@ -208,6 +225,7 @@
     \bool_new:N \g__projlib_author_abstract_before_maketitle_bool
     \bool_gset_false:N \g__projlib_author_abstract_before_maketitle_bool
 
+    \msg_redirect_name:nnn { scontents } { unsupported-verbatim } { info }
     \RequirePackage{ scontents }
     \newenvsc{abstract}[store-env=projlib-author-abstract,print-env=false]
 
@@ -243,7 +261,7 @@
                     \skip_vertical:n { \dim_eval:n { -1.7 \baselineskip } }
                   }
               }
-          } {} { \FAIL }
+          } {} {}
         \makeatother
 
         \hook_gput_code:nnn { cmd/maketitle/before } { projlib-author }
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-datetime.sty b/Master/texmf-dist/tex/latex/projlib/projlib-datetime.sty
index 07c1473171a..aa182abe7c0 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-datetime.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-datetime.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-datetime.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-datetime}
-  {2022/03/03} {}
+  {2022/03/11} {}
   {Convert numeric date-time string to natural language}
 
 \tl_new:N   \g__projlib_datetime_input_format_tl
@@ -72,7 +89,6 @@
     \projlib_datetime_set_input_format:n { #1 }
   }
 
-
 \seq_new:N \l__projlib_datetime_date_seq
 
 \cs_new_protected:Nn \projlib_datetime_text_superscript:n
@@ -83,7 +99,6 @@
     \group_end:
   }
 
-
 \cs_new:Nn \__projlib_datetime_today:n
   {
     \str_case_e:nnF { \l__projlib_datetime_output_format_tl }
@@ -146,10 +161,6 @@
     \group_end:
   }
 
-\ProvideDocumentCommand \Thedate {} { \ProjLibdate }
-\ProvideDocumentCommand \TheDate {} { \ProjLibDate }
-
-
 \cs_new_protected:Nn \projlib_datetime_display_year_month_day:n
   {
     \__projlib_datetime_display_year_month_day:en { #1 } {}
@@ -194,7 +205,6 @@
   }
 \cs_generate_variant:Nn \__projlib_datetime_display_year_month_day:nn { en }
 
-
 \cs_new_protected:Nn \projlib_datetime_display_month_day_year:n
 {
   \__projlib_datetime_display_month_day_year:en { #1 } {}
@@ -239,7 +249,6 @@
 }
 \cs_generate_variant:Nn \__projlib_datetime_display_month_day_year:nn { en }
 
-
 \cs_new_protected:Nn \projlib_datetime_display_day_month_year:n
 {
   \__projlib_datetime_display_day_month_year:en { #1 } {}
@@ -284,7 +293,6 @@
 }
 \cs_generate_variant:Nn \__projlib_datetime_display_day_month_year:nn { en }
 
-
 \cs_new_protected:Nn \__projlib_datetime_date_parse_year_month_day:n
   {
     \regex_match:nnTF { \A \d{4}-\d{1,2}(|-\d{1,2}) \Z } { #1 }
@@ -382,26 +390,30 @@
       }
   }
 
-\NewDocumentCommand \ProjLibdate { O{} m }
+\NewDocumentCommand \ProjLibdate { O{} m O{} }
   {
     \group_begin:
-      \keys_set:nn { projlib-datetime-command } { #1 }
-      \tl_set:Nn \l_tmpa_tl { #2 }
+      \tl_if_blank:eF { #1 } { \keys_set:nn { projlib-datetime-command } { #1 } }
+      \tl_if_blank:eF { #3 } { \keys_set:nn { projlib-datetime-command } { #3 } }
+      \tl_set:Nx \l_tmpa_tl { #2 }
       \regex_replace_all:nnN { \D } { - } \l_tmpa_tl
-      \__projlib_datetime_display_date_according_to_format:nn { \l_tmpa_tl } {}
+      \exp_args:Ne \__projlib_datetime_display_date_according_to_format:nn { \l_tmpa_tl } {}
     \group_end:
   }
 
-\NewDocumentCommand \ProjLibDate { O{} m }
+  \NewDocumentCommand \ProjLibDate { O{} m O{} }
   {
     \group_begin:
-      \keys_set:nn { projlib-datetime-command } { #1 }
-      \tl_set:Nn \l_tmpa_tl { #2 }
+      \tl_if_blank:eF { #1 } { \keys_set:nn { projlib-datetime-command } { #1 } }
+      \tl_if_blank:eF { #3 } { \keys_set:nn { projlib-datetime-command } { #3 } }
+      \tl_set:Nx \l_tmpa_tl { #2 }
       \regex_replace_all:nnN { \D } { - } \l_tmpa_tl
-      \__projlib_datetime_display_date_according_to_format:nn { \l_tmpa_tl } { _uppercase }
+      \exp_args:Ne \__projlib_datetime_display_date_according_to_format:nn { \l_tmpa_tl } { _uppercase }
     \group_end:
   }
 
+\ProvideDocumentCommand \Thedate {} { \ProjLibdate }
+\ProvideDocumentCommand \TheDate {} { \ProjLibDate }
 
 \int_new:N \l__projlib_datetime_day_of_week_day_int
 \int_new:N \l__projlib_datetime_day_of_week_month_int
@@ -463,7 +475,6 @@
       }
   }
 
-
 \cs_new_protected:Nn \projlib_datetime_display_week:n
   {
     \__projlib_datetime_display_week_according_to_format:en { #1 } {}
@@ -481,7 +492,6 @@
   }
 \cs_generate_variant:Nn \__projlib_datetime_display_week_according_to_format:nn { en }
 
-
 \cs_new_protected:Nn \projlib_datetime_calculate_week_according_to_format:n
   {
     \cs_if_exist_use:c { __projlib_datetime_date_parse_ \__projlib_datetime_input_format_to_str: :n } { #1 }
@@ -492,22 +502,6 @@
   }
 
 
-% For each language, there are 7 groups of functions:
-% 1) \projlib_datetime_display_year_month_day_<languagename>:nnn
-%    \projlib_datetime_display_year_month_day_uppercase_<languagename>:nnn
-% 2) \projlib_datetime_display_year_month_<languagename>:nn
-%    \projlib_datetime_display_year_month_uppercase_<languagename>:nn
-% 3) \projlib_datetime_display_month_day_<languagename>:nn
-%    \projlib_datetime_display_month_day_uppercase_<languagename>:nn
-% 4) \projlib_datetime_display_year_<languagename>:n
-%    \projlib_datetime_display_year_uppercase_<languagename>:n
-% 5) \projlib_datetime_display_month_<languagename>:n
-%    \projlib_datetime_display_month_uppercase_<languagename>:n
-% 6) \projlib_datetime_display_day_<languagename>:n
-%    \projlib_datetime_display_day_uppercase_<languagename>:n
-% 7) \projlib_datetime_display_week_<languagename>:n
-%    \projlib_datetime_display_week_uppercase_<languagename>:n
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_english:nnn
   {
     \projlib_datetime_display_month_day_english:nn { #2 } { #3 }
@@ -605,7 +599,6 @@
     \projlib_datetime_display_week_english:n { #1 }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_french:nnn
   {
     \projlib_datetime_display_month_day_french:nn { #2 } { #3 }
@@ -737,7 +730,6 @@
       } { ??? }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_ngerman:nnn
   {
     \projlib_datetime_display_month_day_ngerman:nn { #2 } { #3 }
@@ -847,7 +839,6 @@
     \projlib_datetime_display_week_ngerman:n { #1 }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_italian:nnn
   {
     \projlib_datetime_display_month_day_italian:nn { #2 } { #3 }
@@ -966,7 +957,6 @@
       } { ??? }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_portuguese:nnn
   {
     \projlib_datetime_display_month_day_portuguese:nn { #2 } { #3 }
@@ -1085,7 +1075,6 @@
       } { ??? }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_brazilian:nnn
   {
     \projlib_datetime_display_month_day_brazilian:nn { #2 } { #3 }
@@ -1204,7 +1193,6 @@
       } { ??? }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_spanish:nnn
   {
     \projlib_datetime_display_month_day_spanish:nn { #2 } { #3 }
@@ -1323,7 +1311,6 @@
       } { ??? }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_schinese:nnn
   {
     #1 年 #2 月 #3 日
@@ -1386,7 +1373,6 @@
     \projlib_datetime_display_week_schinese:n { #1 }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_tchinese:nnn
   {
     #1 年 #2 月 #3 日
@@ -1449,7 +1435,6 @@
     \projlib_datetime_display_week_tchinese:n { #1 }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_japanese:nnn
   {
     #1 年 #2 月 #3 日
@@ -1512,7 +1497,6 @@
     \projlib_datetime_display_week_japanese:n { #1 }
   }
 
-
 \cs_new:Nn \projlib_datetime_display_year_month_day_russian:nnn
   {
     \projlib_datetime_display_month_day_russian:nn { #2 } { #3 }
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-draft.sty b/Master/texmf-dist/tex/latex/projlib/projlib-draft.sty
index 6c7fe818c7c..9c9fd22e01b 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-draft.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-draft.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-draft.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-draft}
-  {2022/02/24} {}
+  {2022/03/11} {}
   {Useful commands during draft stage}
 
 \keys_define:nn { projlib-draft }
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-font.sty b/Master/texmf-dist/tex/latex/projlib/projlib-font.sty
index c308c1c66d7..50ffb4258c2 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-font.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-font.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-font.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-font}
-  {2022/03/01} {}
+  {2022/03/11} {}
   {Font selection and configuration}
 
 \keys_define:nn { projlib-font }
@@ -31,6 +48,9 @@
   }
 \ProcessKeysOptions { projlib-font }
 
+\bool_new:N \g_projlib_font_already_set_bool
+\bool_gset_false:N \g_projlib_font_already_set_bool
+
 \RequirePackage { setspace }
 
 \cs_new:Nn \projlib_font_set_linespacing_latin:n
@@ -55,26 +75,81 @@
         \RequirePackage { lmodern }
       }
     \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
   }
 
 \bool_if:NT \l__projlib_font_palatino_bool
   {
-    \RequirePackage { mathpazo }
-    \PassOptionsToPackage { defaultsups } { newpxtext }
-    \RequirePackage { newpxtext }
-    \cs_undefine:c { openbox }
+    \sys_if_engine_pdftex:TF
+    {
+      \RequirePackage { mathpazo }
+      \PassOptionsToPackage { defaultsups } { newpxtext }
+      \RequirePackage { newpxtext }
+      \cs_undefine:c { openbox }
+      \bool_if:NT \l__projlib_font_useosf_bool { \useosf }
+    }
+    {
+      \PassOptionsToPackage { warnings-off = { mathtools-colon, mathtools-overbracket } } { unicode-math }
+      \RequirePackage { unicode-math }
+      \defaultfontfeatures{ Scale=MatchLowercase, Ligatures=TeX }
+      \bool_if:NTF \l__projlib_font_useosf_bool
+        {
+          \setmainfont { TeXGyrePagellaX-Regular.otf }
+            [
+              BoldFont       = TeXGyrePagellaX-Bold.otf ,
+              ItalicFont     = TeXGyrePagellaX-Italic.otf ,
+              BoldItalicFont = TeXGyrePagellaX-BoldItalic.otf,
+              Numbers        = OldStyle ]
+        }
+        {
+          \setmainfont { TeXGyrePagellaX-Regular.otf }
+            [
+              BoldFont       = TeXGyrePagellaX-Bold.otf ,
+              ItalicFont     = TeXGyrePagellaX-Italic.otf ,
+              BoldItalicFont = TeXGyrePagellaX-BoldItalic.otf,
+            ]
+        }
+      \setmathfont { texgyrepagella-math.otf }
+    }
     \projlib_font_set_linespacing_latin:n { \setstretch { 1.07 } }
-    \bool_if:NT \l__projlib_font_useosf_bool { \useosf }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
   }
 
 \bool_if:NT \l__projlib_font_times_bool
   {
-    \PassOptionsToPackage { defaultsups } { newtxtext }
-    \RequirePackage { newtxtext }
-    \RequirePackage { newtxmath }
-    \cs_undefine:c { openbox }
+    \sys_if_engine_pdftex:TF
+      {
+        \PassOptionsToPackage { defaultsups } { newtxtext }
+        \RequirePackage { newtxtext }
+        \RequirePackage { newtxmath }
+        \cs_undefine:c { openbox }
+        \bool_if:NT \l__projlib_font_useosf_bool { \useosf }
+      }
+      {
+        \PassOptionsToPackage { warnings-off = { mathtools-colon, mathtools-overbracket } } { unicode-math }
+        \RequirePackage { unicode-math }
+        \defaultfontfeatures{ Scale=MatchLowercase, Ligatures=TeX }
+        \bool_if:NTF \l__projlib_font_useosf_bool
+          {
+            \setmainfont { TeXGyreTermesX-Regular.otf }
+              [
+                BoldFont       = TeXGyreTermesX-Bold.otf ,
+                ItalicFont     = TeXGyreTermesX-Italic.otf ,
+                BoldItalicFont = TeXGyreTermesX-BoldItalic.otf,
+                Numbers        = OldStyle ]
+          }
+          {
+            \setmainfont { TeXGyreTermesX-Regular.otf }
+              [
+                BoldFont       = TeXGyreTermesX-Bold.otf ,
+                ItalicFont     = TeXGyreTermesX-Italic.otf ,
+                BoldItalicFont = TeXGyreTermesX-BoldItalic.otf,
+              ]
+          }
+        \setmathfont { texgyretermes-math.otf }
+      }
     \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
-    \bool_if:NT \l__projlib_font_useosf_bool { \useosf }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
   }
 
 \bool_if:NT \l__projlib_font_garamond_bool
@@ -87,7 +162,9 @@
     \cs_undefine:c { openbox }
     \RequirePackage { ebgaramond-maths }
     \RequirePackage { ebgaramond }
+    \cs_undefine:c { Bbbk }
     \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
   }
 
 \bool_if:NT \l__projlib_font_noto_bool
@@ -98,7 +175,9 @@
       }
     \RequirePackage { anyfontsize }
     \RequirePackage { notomath }
+    \cs_undefine:c { Bbbk }
     \projlib_font_set_linespacing_latin:n { \setstretch { 1.00 } }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
   }
 
 \bool_if:NT \l__projlib_font_biolinum_bool
@@ -133,10 +212,10 @@
       }
     \projlib_font_set_linespacing_latin:n { \setstretch { 1.05 } }
     \RequirePackage [ italic, defaultmathsizes ] { mathastext }
+    \bool_gset_true:N \g_projlib_font_already_set_bool
   }
 
-\RequirePackage { silence }
-\WarningFilter { microtype } { Unable }
+\PassOptionsToPackage { verbose = silent } { microtype }
 \RequirePackage { microtype }
 
 \endinput
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-language.sty b/Master/texmf-dist/tex/latex/projlib/projlib-language.sty
index 4a67c6a018e..df1df41fd72 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-language.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-language.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-language.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-language}
-  {2022/03/09} {}
+  {2022/03/11} {}
   {Multi-language configuration}
 
 \clist_const:Nn \c__projlib_language_supported_clist
@@ -126,7 +143,6 @@
       }
   }
 
-
 \cs_new:Nn \projlib_language_str_to_languagename:n
   {
     \str_case_e:nnF { \str_foldcase:n { #1 } }
@@ -220,7 +236,6 @@
 \PassOptionsToPackage { italian, brazilian, spanish, ngerman, french, english } { cleveref }
 \RequirePackage { babel }
 
-
 \bool_if:NT \g__projlib_language_enabled_french_bool
   {
     \frenchsetup { PartNameFull = false }
@@ -248,7 +263,6 @@
 \babelprovide { schinese }
 \babelprovide { tchinese }
 
-
 \NewCommandCopy \projlib_language_backup_today:n \today
 
 \tl_new:N \g_projlib_language_settings_common_tl
@@ -356,7 +370,7 @@
 
 \NewDocumentCommand \AddLanguageSetting { O{} m }
   {
-    \IfNoValueTF { #1 }
+    \tl_if_empty:nTF { #1 }
       {
         \tl_gput_right:Nn \g_projlib_language_settings_common_tl { #2 }
       }
@@ -365,7 +379,6 @@
       }
   }
 
-
 \RequirePackage { setspace }
 
 \tl_new:N  \g_projlib_language_linespacing_latin_tl
@@ -446,7 +459,6 @@
     \use:c { projlib_language_set_ #1 _ #2 :n } { #3 }
   }
 
-
 \cs_new:Nn \projlib_language_use_language_pure:n
   {
     \tl_use:c { g_projlib_language_settings_ \projlib_language_str_to_languagename:n { #1 } _tl }
@@ -478,7 +490,6 @@
 
 \UseLanguage { \g__projlib_language_main_str }
 
-
 \cs_new:Nn \projlib_langauge_define_multilingual_text:Nn
   { % #1 = command name (with backslash)
     % #2 = key-value name configuration
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-logo.sty b/Master/texmf-dist/tex/latex/projlib/projlib-logo.sty
index d9ffb5c1ed2..ee59a9e5f43 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-logo.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-logo.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-logo.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-logo}
-  {2022/02/24} {}
+  {2022/03/11} {}
   {The ProjLib logo}
 
 \keys_define:nn { projlib-logo }
@@ -54,21 +71,6 @@
       }
   }
 
-% \RequirePackage { xcolor }
-% \cs_new_protected:Nn \projlib_logo_generic:n
-%   {
-%     \group_begin:
-%       \normalfont
-%       \__projlib_logo_font:
-%       \textcolor { blue!55!cyan }       { P }
-%       \textcolor { blue!45!cyan }       { r }
-%       \textcolor { blue!30!cyan }       { o }
-%       \textcolor { green!70!black!70 }  { #1 }
-%       \textcolor { red!20!yellow }      { L }
-%       \textcolor { red!40!yellow }      { i }
-%       \textcolor { red!55!yellow }      { b }
-%     \group_end:
-%   }
 \cs_new_protected:Nn \projlib_logo_generic:n
   {
     \group_begin:
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-math.sty b/Master/texmf-dist/tex/latex/projlib/projlib-math.sty
index 977a4280038..04d1f190bd4 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-math.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-math.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-math.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-math}
-  {2022/02/26} {}
+  {2022/03/11} {}
   {Efficient math setup}
 
 \keys_define:nn { projlib-math }
@@ -16,7 +33,6 @@
 \PassOptionsToPackage { warnings-off = { mathtools-colon, mathtools-overbracket } } { unicode-math }
 \@ifpackageloaded { unicode-math } {} { \RequirePackage { amssymb } }
 
-
 \msg_new:nnn { projlib-math }
   { operator-not-define }
   { The~math~operator~"\iow_char:N \\#1"~cannot~be~defined,~a~command~with~the~same~name~has~already~existed. }
@@ -87,7 +103,6 @@
       }
   }
 
-
 \msg_new:nnn { projlib-math }
   { shortcut-not-define }
   { The~shortcut~"\iow_char:N \\#1"~cannot~be~defined,~a~command~with~the~same~name~has~already~existed. }
@@ -190,45 +205,6 @@
       }
   }
 
-%===============================
-% -- Some possible operators --
-%===============================
-% \DefineOperator { ord, card, car, disc }  [ style = \mathsf ]
-% \DefineOperator { id, Id, Ker, Image = Im } [ style = \mathsf ]
-% \DefineOperator { Orb, Stab, Fix } [ style = \mathsf ]
-% \DefineOperator { Hom, Aut, End, Mat } [ style = \mathsf ]
-% \DefineOperator { Spec, Spm, Ann } [ style = \mathsf ]
-% \DefineOperator*{ Lim, Max, Min } [ style = \mathsf ]
-
-%===============================
-% -- Some possible shortcuts --
-%===============================
-% \DefineShortcut [ type = category, style = \mathbf ]
-%   {
-%     Set, Grp, Ring, Top
-%   }
-% \DefineShortcut [ style = \mathbb ]
-%   {
-%     N, Z, Q, R, C, F, A
-%   }
-% \DefineShortcut [ prefix = bb, style = \mathbb ]
-%   {
-%     A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
-%   }
-% \DefineShortcut [ prefix = { mf, frak }, style = \mathfrak ]
-%   {
-%     A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
-%     a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z
-%   }
-% \DefineShortcut [ prefix = { mc, cal }, style = \mathcal ]
-%   {
-%     A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
-%   }
-% \DefineShortcut [ prefix = { ms, scr }, style = \mathscr ]
-%   {
-%     A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
-%   }
-
 \endinput
 %%
 %% End of file `projlib-math.sty'.
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-paper.sty b/Master/texmf-dist/tex/latex/projlib/projlib-paper.sty
index bb13bbe00a2..6835198f3a7 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-paper.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-paper.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-paper.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-paper}
-  {2022/03/09} {}
+  {2022/03/11} {}
   {Configuration of the paper style}
 
 \keys_define:nn { projlib-paper }
diff --git a/Master/texmf-dist/tex/latex/projlib/projlib-theorem.sty b/Master/texmf-dist/tex/latex/projlib/projlib-theorem.sty
index 092ca2f0ead..69d1ed3261d 100644
--- a/Master/texmf-dist/tex/latex/projlib/projlib-theorem.sty
+++ b/Master/texmf-dist/tex/latex/projlib/projlib-theorem.sty
@@ -1,8 +1,25 @@
+%%
+%% This is file `projlib-theorem.sty',
+%% generated with the docstrip utility.
+
+%% Copyright (C) 2021-2022 by Jinwen XU
+%% 
+%% This is part of the ProjLib Toolkit.
+%% 
+%% This work may be distributed and/or modified under the conditions of the
+%% LaTeX Project Public License, either version 1.3c of this license or (at
+%% your option) any later version. The latest version of this license is in
+%% 
+%%     http://www.latex-project.org/lppl.txt
+%% 
+%% and version 1.3c or later is part of all distributions of LaTeX version
+%% 2005/12/01 or later.
+%% 
 \NeedsTeXFormat{LaTeX2e}[2020-10-01]
 \RequirePackage{l3keys2e}
 \ProvidesExplPackage
   {projlib-theorem}
-  {2022/03/09} {}
+  {2022/03/11} {}
   {Configuration of theorem-like environments}
 
 \keys_define:nn { projlib-theorem }
@@ -29,10 +46,9 @@
     , complex-name          .initial:n          = { true }
     , complex~name          .bool_set:N         = \l__projlib_theorem_complexname_bool
     , complex name          .bool_set:N         = \l__projlib_theorem_complexname_bool
-    , simple-name           .bool_set:N         = \l__projlib_theorem_simplename_bool
-    , simple-name           .initial:n          = { false }
-    , simple~name           .bool_set:N         = \l__projlib_theorem_simplename_bool
-    , simple name           .bool_set:N         = \l__projlib_theorem_simplename_bool
+    , simple-name           .bool_set_inverse:N = \l__projlib_theorem_complexname_bool
+    , simple~name           .bool_set_inverse:N = \l__projlib_theorem_complexname_bool
+    , simple name           .bool_set_inverse:N = \l__projlib_theorem_complexname_bool
     , no-preset-names       .bool_set_inverse:N = \l__projlib_theorem_presetname_bool
     , no-preset-names       .initial:n          = { false }
     , no~preset~names       .bool_set_inverse:N = \l__projlib_theorem_presetname_bool
@@ -41,7 +57,7 @@
   }
 \ProcessKeysOptions { projlib-theorem }
 
-\clist_const:Nn \c__projlib_theorem_supported_clist
+\clist_const:Nn \c_projlib_theorem_supported_clist
   {
     assertion                 ,
     assumption                ,
@@ -65,6 +81,8 @@
     question                  ,
     remark                    ,
     theorem                   ,
+    definition-proposition    ,
+    definition-theorem        ,
   }
 
 \@ifclassloaded { beamer }
@@ -86,20 +104,15 @@
 
 \RequirePackage { projlib-language }
 
-\bool_if:NF \l__projlib_theorem_complexname_bool
-  {
-    \PassOptionsToPackage { no preset names } { create-theorem }
-  }
 
 \RequirePackage { amsthm }
 \RequirePackage { create-theorem }
 
-
 \bool_if:NF \l__projlib_theorem_no_theorems_bool
   {
     \bool_if:NTF \l__projlib_theorem_no_theorem_numbering_bool
       {
-        \exp_args:Nv \CreateTheorem { c__projlib_theorem_supported_clist } { numberless }
+        \exp_args:Nv \CreateTheorem { c_projlib_theorem_supported_clist } { numberless }
       }
       {
         \tl_if_blank:eTF \l__projlib_theorem_theorem_numbering_tl
@@ -122,11 +135,10 @@
               }
           }
 
-        \exp_args:Nv \CreateTheorem { c__projlib_theorem_supported_clist } { shared counter = theorem, quiet }
+        \exp_args:Nv \CreateTheorem { c_projlib_theorem_supported_clist } { shared counter = theorem, quiet }
       }
   }
 
-
 \AddLanguageSetting [ schinese ]
   {
     \crefname { equation } { 式 } { 式 }
@@ -222,11 +234,9 @@
     \tl_gset:Nn { \crefrangeconjunction } { \nobreakspace a \nobreakspace }
   }
 
-
 \bool_if:NF \l__projlib_theorem_presetname_bool { \endinput }
 \bool_if:NT \l__projlib_theorem_complexname_bool { \endinput }
 
-
 \NameTheorem { assertion }
   {
     , heading =   {
@@ -1173,12 +1183,92 @@
                   }
   }
 
+\NameTheorem { definition-proposition }
+  {
+    , heading =   {
+                    , english     = Definition-Proposition
+                    , french      = Définition-Proposition
+                    , ngerman     = Definition-Proposition
+                    , italian     = Definizione-Proposizione
+                    , portuguese  = Definição-Proposição
+                    , brazilian   = Definição-Proposição
+                    , spanish     = Definición-Proposición
+                    , schinese    = 定义-命题
+                    , tchinese    = 定義-命題
+                    , japanese    = 定義-命題
+                    , russian     = Определение-Предложение
+                  }
+    , crefname =  {
+                    , english     = {Definition-Proposition}{Definition-Proposition}
+                    , french      = [la]{Définition-Proposition}[les]{Définition-Proposition}
+                    , ngerman     = {Definition-Proposition}{Definition-Proposition}
+                    , italian     = [la]{Definizione-Proposizione}[le]{Definizione-Proposizione}
+                    , portuguese  = [a]{Definição-Proposição}[as]{Definição-Proposição}
+                    , brazilian   = [a]{Definição-Proposição}[as]{Definição-Proposição}
+                    , spanish     = [la]{Definición-Proposición}[las]{Definición-Proposición}
+                    , schinese    = {定义-命题}{定义-命题}
+                    , tchinese    = {定義-命題}{定義-命題}
+                    , japanese    = {定義-命題}{定義-命題}
+                    , russian     = {Определение-Предложение}{Определение-Предложение}
+                  }
+    , Crefname =  {
+                    , english     = {Definition-Proposition}{Definition-Proposition}
+                    , french      = [La]{Définition-Proposition}[Les]{Définition-Proposition}
+                    , ngerman     = {Definition-Proposition}{Definition-Proposition}
+                    , italian     = [La]{Definizione-Proposizione}[Le]{Definizione-Proposizione}
+                    , portuguese  = [A]{Definição-Proposição}[As]{Definição-Proposição}
+                    , brazilian   = [A]{Definição-Proposição}[As]{Definição-Proposição}
+                    , spanish     = [La]{Definición-Proposición}[Las]{Definición-Proposición}
+                    , schinese    = {定义-命题}{定义-命题}
+                    , tchinese    = {定義-命題}{定義-命題}
+                    , japanese    = {定義-命題}{定義-命題}
+                    , russian     = {Определение-Предложение}{Определение-Предложение}
+                  }
+  }
+
+\NameTheorem { definition-theorem }
+  {
+    , heading =   {
+                    , english     = Definition-Theorem
+                    , french      = Définition-Théorème
+                    , ngerman     = Definition-Satz
+                    , italian     = Definizione-Teorema
+                    , portuguese  = Definição-Teorema
+                    , brazilian   = Definição-Teorema
+                    , spanish     = Definición-Teorema
+                    , schinese    = 定义-定理
+                    , tchinese    = 定義-定理
+                    , japanese    = 定義-定理
+                    , russian     = Определение-Теорема
+                  }
+    , crefname =  {
+                    , english     = {Definition-Theorem}{Definition-Theorem}
+                    , french      = [la]{Définition-Théorème}[les]{Définition-Théorème}
+                    , ngerman     = {Definition-Satz}{Definition-Satz}
+                    , italian     = [la]{Definizione-Teorema}[le]{Definizione-Teorema}
+                    , portuguese  = [a]{Definição-Teorema}[as]{Definição-Teorema}
+                    , brazilian   = [a]{Definição-Teorema}[as]{Definição-Teorema}
+                    , spanish     = [la]{Definición-Teorema}[las]{Definición-Teorema}
+                    , schinese    = {定义-定理}{定义-定理}
+                    , tchinese    = {定義-定理}{定義-定理}
+                    , japanese    = {定義-定理}{定義-定理}
+                    , russian     = {Определение-Теорема}{Определение-Теорема}
+                  }
+    , Crefname =  {
+                    , english     = {Definition-Theorem}{Definition-Theorem}
+                    , french      = [La]{Définition-Théorème}[Les]{Définition-Théorème}
+                    , ngerman     = {Definition-Satz}{Definition-Satz}
+                    , italian     = [La]{Definizione-Teorema}[Le]{Definizione-Teorema}
+                    , portuguese  = [A]{Definição-Teorema}[As]{Definição-Teorema}
+                    , brazilian   = [A]{Definição-Teorema}[As]{Definição-Teorema}
+                    , spanish     = [La]{Definición-Teorema}[Las]{Definición-Teorema}
+                    , schinese    = {定义-定理}{定义-定理}
+                    , tchinese    = {定義-定理}{定義-定理}
+                    , japanese    = {定義-定理}{定義-定理}
+                    , russian     = {Определение-Теорема}{Определение-Теорема}
+                  }
+  }
+
 \endinput
 %%
 %% End of file `projlib-theorem.sty'.
-
-
-接下来：
-1. ✅ 定义 \SetTheorem，用于处理编号和名称样式的问题
-2. ✅ 定义 complexname 与 simplename
-3. ✅ 给出定理类环境的初始化，注意 no-theorem 与 no-theorem-numbering 等选项