### Encode code line using MathML mtable

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/verbatim

Example of encoding a line of code within an mtable element with a literal intent.

```xml
<mtr><mtd intent=":literal"><mtext> main</mtext><mo>(</mo><mtext> </mtext><mo>)</mo><mtext> </mtext><mo>{</mo></mtd></mtr>
```

--------------------------------

### Configure LaTeX for Tagged PDF Output

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/small-example

Use the \DocumentMetadata command before \documentclass to define document language, PDF version, and standards compliance. The tagging-setup key allows for specific MathML integration configurations.

```latex
% Using the \DocumentMetadata command results in a tagged and accessible PDF file.
% Use ‘pdfversion’ and ‘pdfstandard’ keys to select the output file type.
\DocumentMetadata{
  lang          = en,
  pdfversion    = 2.0,  % or 1.7 if desired pdfstandard = UA-1
  pdfstandard   = UA-2, % or UA-1 if pdfversion = 1.7
  pdfstandard   = A-4f, % 4f allows embedd CSS files.
  tagging-setup = {math/setup=mathml-SE} % Or mathml-AF (see below)
}
% The above declaration results in a tagged PDF with MathML included via structure elements (tags).
% Remove the `tagging-setup` line, or change to `mathml-AF` to generate a tagged PDF with
% MathML Associated Files. MathML files may be embedded while conforming to
% PDF/A-4, however as LaTeX embeds additional CSS PDF/A-4f is required,
\documentclass{article}
% Using Unicode math fonts improves the tagging of math.
\usepackage{unicode-math}
% Classic LaTeX document markup from here.
\begin{document}
\section{A small example}
Some inline mathematics involving $x\in\symbb{R}$.
A list of items
\begin{enumerate}
\item a first item;
\item a second item;
\item a third item.
\end{enumerate}
Display math
\[
c=\sqrt{a^2+b^2}
\]
\end{document}
```

--------------------------------

### Configure MathML via associated files

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/larger-example

Use this configuration to represent formulas as embedded Associated Files (AF) within the PDF.

```latex
\DocumentMetadata{
  lang          = en,
  pdfversion    = 2.0,
  pdfstandard   = UA-2,
  pdfstandard   = A-4f,
  tagging-setup = {math/setup=mathml-AF, extra-modules={verbatim-af}}
}
\AtBeginDocument{
\AssignTaggingSocketPlug{math/display/tag/begin}{noop}
\AssignTaggingSocketPlug{math/display/tag/end}{noop}
}
\input{stem-article-2col}
```

--------------------------------

### Configure MathML via structure elements

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/larger-example

Use this configuration to embed MathML directly into the PDF's tags tree as structure elements.

```latex
\DocumentMetadata{
  lang          = en,
  pdfversion    = 2.0,
  pdfstandard   = UA-2,
  pdfstandard   = A-4f, % even with SE this requires 4f because of embedded CSS
  tagging-setup = {math/setup=mathml-SE, extra-modules={verbatim-mo}}
}
\input{stem-article-2col}
```

--------------------------------

### Display Braille for original source code

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/verbatim

Shows the Braille representation of the first line of source code using default NVDA settings.

```text
 main( ) {
 ⠍ ⠁ ⠊ ⠝ ⠐ ⠣   ⠐ ⠜   ⠸ ⠣                                                        
 
```

--------------------------------

### Display Braille for Alt-tagged code

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/verbatim

Shows how the code is rendered into two lines when using Alt attributes for accessibility.

```text
 new line  main open paren   close p
   ⠝ ⠑ ⠺   ⠇ ⠊ ⠝ ⠑     ⠍ ⠁ ⠊ ⠝   ⠕ ⠏ ⠑ ⠝   ⠏ ⠁ ⠗ ⠑ ⠝       ⠉ ⠇ ⠕ ⠎ ⠑            
   
 paren   open brace  
 ⠏ ⠁ ⠗ ⠑ ⠝       ⠕ ⠏ ⠑ ⠝   ⠃ ⠗ ⠁ ⠉ ⠑                                            
 
```

--------------------------------

### Display Braille for MathML-tagged code

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/verbatim

Shows the Braille output when using MathML to tag symbols in the code.

```text
main ( ) {
  ⠍ ⠁ ⠊ ⠝   ⠷         ⠾         ⠨ ⠷                                            

```

--------------------------------

### Two-column LaTeX document structure

Source: https://latex3.github.io/tagging-project/documentation/wtpdf/larger-example

A template for a two-column article with basic tagging support and standard document packages.

```latex
\documentclass[a4paper,twocolumn]{article}
\usepackage{unicode-math}
\usepackage{graphicx}
\usepackage{amsthm}
\newtheorem{theorem}{Theorem}
\usepackage[colorlinks]{hyperref}
\addtolength\marginparwidth{1.3cm}
\addtolength\textheight{-5\baselineskip}
\addtolength\paperheight{-5\baselineskip}
\counterwithin{equation}{section}
% stub if not tagging
\providecommand\tagpdfsetup[1]{}
\begin{document}
\title{A Two Column Example}
\date{2025-06-18}
\author{The \LaTeX\ Team}
\pagestyle{headings}
\maketitle
\begin{abstract}
  An example document showing automatic tagging of typical structures
  found in a \LaTeX\ document, including titles, sections, theorems, lists,
  citation lists and mathematics. A two column layout is used, the
  tagging enables the reading order to correctly follow the flow of
  text through the columns.
\end{abstract}
\tableofcontents
\section{Introduction}
This document shows a typical two-column document incorporating tables, figures and mathematics.
Apart from two commands at the start to enable tagging, and a small
amount of additional markup to give alternative texts for graphics
inclusion, and to specify the heading rows of tables.%
\footnote{The current tagging markup for tables is temporary and a new interface
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.