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diff --git a/macros/latex/contrib/pdfmanagement-testphase/l3ref-tmp.sty b/macros/latex/contrib/pdfmanagement-testphase/l3ref-tmp.sty
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@@ -0,0 +1,131 @@
+%%
+%% This is file `l3ref-tmp.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% l3ref.dtx  (with options: `package')
+%%
+%% Copyright (C) 2020-2021 The LaTeX Project
+%%
+%% It may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License (LPPL), either version 1.3c of
+%% this license or (at your option) any later version.  The latest
+%% version of this license is in the file:
+%%
+%%    http://www.latex-project.org/lppl.txt
+%%
+%% This file is part of the "l3ref bundle" (The Work in LPPL)
+%% and all files in that bundle must be distributed together.
+%%
+%% File: l3ref.dtx
+\ProvidesExplPackage{l3ref-tmp}{2020-10-09}{}
+  {L3 Experimental cross-referencing}
+\cs_new_protected:Npn \ref_attribute_gset:nnnn #1#2#3#4
+  {
+    \exp_args:Nx \__ref_attribute_gset:nnnn { \tl_to_str:n {#1} }
+      {#2} {#3} {#4}
+  }
+\cs_new_protected:Npn \__ref_attribute_gset:nnnn #1#2#3#4
+  {
+    \cs_gset:cpn { __ref_attribute_ #1 : } {#4}
+    \tl_gclear_new:c { g__ref_default_ #1 _tl }
+    \tl_gset:cn { g__ref_default_ #1 _tl } {#2}
+    \bool_if_exist:cF { g__ref_shipout_ #1 _tl }
+      { \bool_new:c { g__ref_shipout_ #1 _tl } }
+    \str_case:nnF {#3}
+      {
+        { now } { { \bool_gset_false:c { g__ref_shipout_ #1 _tl } } }
+        { shipout }
+          { \bool_gset_true:c { g__ref_shipout_ #1 _tl } }
+      }
+      { \msg_error:nnnn { ref } { unknown-setpoint } {#1} {#3} }
+  }
+\cs_new_protected:Npn \ref_label:nN #1#2
+  { \ref_label:nV {#1} #2 }
+\cs_new_protected:Npn \ref_label:nn #1#2
+  { \exp_args:Nx \__ref_label:nn { \tl_to_str:n {#1} } {#2} }
+\cs_generate_variant:Nn \ref_label:nn { nV }
+\cs_new_protected:Npn \__ref_label:nn #1#2
+  {
+    \legacy_if:nT { @filesw }
+      {
+        \iow_shipout_x:Nx \@auxout
+          {
+            \token_to_str:N \newlabeldata
+              {#1}
+              { \clist_map_function:nN {#2} \__ref_label_attribute:n }
+          }
+      }
+  }
+\cs_new:Npn \__ref_label_attribute:n #1
+  { \exp_args:Ne \__ref_label_attribute_aux:n { \tl_to_str:n {#1} } }
+\cs_new:Npn \__ref_label_attribute_aux:n #1
+  {
+    \cs_if_exist:cTF { __ref_attribute_ #1 : }
+      {
+        {#1}
+        {
+          \bool_if:cTF { g__ref_shipout_ #1 _tl }
+            { \exp_not:c }
+            { \use:c }
+              { __ref_attribute_ #1 : }
+        }
+      }
+      { \msg_expandable_error:nnn { ref } { attribute-not-defined } {#1} }
+  }
+\cs_new:Npn \ref_value:nn #1#2
+  {
+    \exp_args:Nee \__ref_value:nn { \tl_to_str:n {#1} } { \tl_to_str:n {#2} }
+  }
+\cs_new:Npn \__ref_value:nn #1#2
+  {
+    \tl_if_exist:cTF { g__ref_label_ #1 _ #2 _tl }
+      { \tl_use:c { g__ref_label_ #1 _ #2 _tl } }
+      {
+        \tl_if_exist:cTF { g__ref_default_ #2 _tl }
+          { \tl_use:c { g__ref_default_ #2 _tl } }
+          { \exp_not:n { \textbf { ?? } } }
+      }
+  }
+\prg_new_conditional:Npnn \ref_if_exist:nn #1#2 { p , T , F,  TF }  % #1 label #2 attribute
+  {
+    \tl_if_exist:cTF { g__ref_label_ \tl_to_str:n {#1} _ \tl_to_str:n {#2} _tl }
+      {
+        \prg_return_true:
+      }
+      {
+        \prg_return_false:
+      }
+  }
+\cs_new_protected:Npn \newlabeldata #1#2
+  {
+    \__ref_data:nnn {#1} #2 { \q_recursion_tail } { ? } \q_recursion_stop
+  }
+\cs_new_protected:Npn \__ref_data:nnn #1#2#3
+  {
+    \quark_if_recursion_tail_stop:n {#2}
+    \tl_gclear_new:c { g__ref_label_ #1 _ #2 _tl }
+    \tl_gset:cn { g__ref_label_ #1 _ #2 _tl } {#3}
+    \__ref_data:nnn {#1}
+  }
+\ref_attribute_gset:nnnn { abspage } { 0 } { shipout }
+  { \int_use:N \g_shipout_readonly_int }
+\ref_attribute_gset:nnnn { page } { 0 } { shipout } { \thepage }
+\clist_new:N \g_ref_main_clist
+\clist_gput_right:Nn \g_ref_main_clist { page }
+\msg_new:nnnn { ref } { attribute-not-defined }
+  { Attribute~'#1'~not~defined. }
+  {
+    LaTeX~has~been~asked~to~use~attribute~'#1',~but~this~
+    name~has~not~been~defined.
+  }
+\msg_new:nnnn { ref } { unknown-setpoint }
+  { Unknown~keyword~'#3'~for~setting~attribute~'#1'. }
+  {
+    LaTeX~has~been~asked~to~set~the~attribute~'#1',~but~the~keyword~
+    '#3'~is~not~one~of~the~two~known~values:~'now'~or~'shipout'.
+  }
+%%
+%%
+%% End of file `l3ref.sty'.