Use order keys for heading templates

required/latex-lab/changes.txt

@@ -1,3 +1,32 @@
+2026-08-23  Frank Mittelbach  <Frank.Mittelbach@latex-project.org>
+
+	* latex-lab-sec-template.dtx (subsubsection{headformat templates interfaces}):
+	Use order key mechanism in hadformat templates.
+
+	* latex-lab-firstaid.dtx:
+	Adjust AMS class fixes to new heading templates.
+
+2026-08-19  Frank Mittelbach  <Frank.Mittelbach@latex-project.org>
+
+	* latex-lab-template.dtx (section{The Implementation}):
+	Support special order key items ?, |, and, !.
+
+2026-08-14  Frank Mittelbach  <Frank.Mittelbach@latex-project.org>
+
+	* latex-lab-template.dtx:
+	Add support for special | item in order clists.
+	Add \IfValueLastOrderItemTF to do conditional formatting based on whether
+	or not last item had a value.
+
+2026-08-12  Frank Mittelbach  <Frank.Mittelbach@latex-project.org>
+
+	* latex-lab-sec-template.dtx (subsubsection{New \cs{@startsection}}):
+	Provide command to split off last token of a token list if it
+	is a macro with one argument (tagging/1521)
+
+	Split style argument of \@startsection based on type of
+	last token (tagging/1521)
+
 2026-08-10  Frank Mittelbach  <Frank.Mittelbach@latex-project.org>
 
 	* latex-lab-enumitem.dtx (subsubsection{\cs{newlist}}):

required/latex-lab/latex-lab-firstaid.dtx

@@ -15,8 +15,8 @@
 %
 %    https://github.com/latex3/latex2e/issues
 %
-\def\ltlabfirstaiddate{2026-08-07}
-\def\ltlabfirstaidversion{0.85z}
+\def\ltlabfirstaiddate{2026-08-23}
+\def\ltlabfirstaidversion{0.86a}
 
 %<*driver>
 \DocumentMetadata{tagging=on,pdfstandard=ua-2}
@@ -331,8 +331,8 @@
 %    \begin{macrocode}
 \DeclareInstance{headformat}{chapter}{display}
   {
-    , heading-indent   = 0pt        %% <-- needed?
-    , number-title-sep = 18pt
+    , heading-indent = 0pt        %% <-- needed?
+    , separator-2    = 18pt
   }
 %    \end{macrocode}
 %    
@@ -353,7 +353,7 @@
   }
 \DeclareInstance{headformat}{section}{hang}
   {
-    number-title-sep = 0.5em,
+    separator-2 = 0.5em,
   }
 %    \end{macrocode}
 %
@@ -380,12 +380,12 @@
     , headformat-instance = subsection
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subsection}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
-    , heading-indent   = \normalparindent
+    , separator-2    = 0.5em
+    , heading-indent = \normalparindent
   }
 %    \end{macrocode}
 %    
@@ -401,12 +401,12 @@
     , headformat-instance = subsubsection
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subsubsection}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
-    , heading-indent   = \normalparindent
+    , separator-2    = 0.5em
+    , heading-indent = \normalparindent
   }
 %    \end{macrocode}
 %    
@@ -422,12 +422,12 @@
     , headformat-instance = paragraph
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{paragraph}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
-    , heading-indent   = \normalparindent
+    , separator-2    = 0.5em
+    , heading-indent = \normalparindent
   }
 %    \end{macrocode}
 %    
@@ -443,11 +443,11 @@
     , headformat-instance = subparagraph
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subparagraph}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1.
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %
@@ -486,7 +486,7 @@
   }
 \DeclareInstance{headformat}{part}{hang}
   {
-    , number-title-sep = 0.5em
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %
@@ -506,7 +506,7 @@
   }
 \DeclareInstance{headformat}{section}{hang}
   {
-    , number-title-sep = 0.5em
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %    
@@ -534,11 +534,11 @@
     , headformat-instance = subsection
     , number-format       = \theheading .
     , number-decls        = \mdseries \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subsection}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %    
@@ -554,11 +554,11 @@
     , headformat-instance = subsubsection
     , number-format       = \theheading .
     , number-decls        = \mdseries \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subsubsection}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %    
@@ -574,11 +574,11 @@
     , headformat-instance = paragraph
     , number-format       = \theheading .
     , number-decls        = \mdseries \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{paragraph}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %    
@@ -594,11 +594,11 @@
     , headformat-instance = subparagraph
     , number-format       = \theheading .
     , number-decls        = \mdseries \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subparagraph}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %
@@ -631,7 +631,7 @@
   }
 \DeclareInstance{headformat}{part}{hang}
   {
-    , number-title-sep = 0.5em
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %
@@ -651,7 +651,7 @@
   }
 \DeclareInstance{headformat}{section}{hang}
   {
-    , number-title-sep = 0.5em
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %    
@@ -678,12 +678,12 @@
     , headformat-instance = subsection
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subsection}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
-    , heading-indent   = \normalparindent
+    , separator-2    = 0.5em
+    , heading-indent = \normalparindent
   }
 %    \end{macrocode}
 %    
@@ -699,12 +699,12 @@
     , headformat-instance = subsubsection
     , number-format       = \theheading .
     , number-decls        =  \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subsubsection}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
-    , heading-indent   = \normalparindent
+    , separator-2    = 0.5em
+    , heading-indent = \normalparindent
   }
 %    \end{macrocode}
 %    
@@ -720,11 +720,11 @@
     , headformat-instance = paragraph
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format        = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{paragraph}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
+    , separator-2 = 0.5em
     , heading-indent   = \normalparindent
   }
 %    \end{macrocode}
@@ -741,11 +741,11 @@
     , headformat-instance = subparagraph
     , number-format       = \theheading .
     , number-decls        = \upshape
+    , title-format = #1 \AddPunct{.}
   }
 \DeclareInstance{headformat}{subparagraph}{runin}
   {
-    , number-title-sep = 0.5em
-    , title-format     = #1 \AddPunct{.}
+    , separator-2 = 0.5em
   }
 %    \end{macrocode}
 %

required/latex-lab/latex-lab-namespace.dtx

@@ -12,8 +12,8 @@
 %    https://www.latex-project.org/lppl.txt
 %
 %<*package>
-\def\ltlabnamesdate{2026-07-29}
-\def\ltlabnamesversion{0.8l}
+\def\ltlabnamesdate{2026-08-23}
+\def\ltlabnamesversion{0.8m}
 %</package>
 %<*driver>
 \DocumentMetadata{tagging=on,pdfstandard=ua-2}
@@ -183,6 +183,9 @@ text-block,   P,        pdf2,
 text-fragment,Span,     pdf2,
 %    \end{macrocode}
 % \subsection{From sec code}
+%
+%    \fmi{don't think this should be called
+%    \texttt{section-number}. Maybe \texttt{heading-number}?}
 %    \begin{macrocode}
 section-number, Span,     pdf2,
 %    \end{macrocode}
@@ -278,6 +281,12 @@ tables,       Sect,     pdf2,
 % Sub does not work as part is rolemapped to Title so we use Span 
 %    \begin{macrocode}
 \AssignStructureRole{sec/-1/titleline}{Span} 
+%    \end{macrocode}
+%    \fmi{2026/08/22: I have some serious doubts that defining the structure name for the
+%    /number on a heading level is in any way useful. It certainly
+%    doesn't fit nicely with the template approach which is why I'm
+%    currently not using the declarations here.}
+%    \begin{macrocode}
 \NewStructureName{sec/-1/number}
 \AssignStructureRole{sec/-1/number}{section-number}
 \NewStructureName{sec/0}