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| <title>HTML Xref Command Expansion (GNU Texinfo 6.8dev)</title> |
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| <div class="subsection-level-extent" id="HTML-Xref-Command-Expansion"> |
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| <p> |
| Next: <a href="HTML-Xref-8_002dbit-Character-Expansion.html" accesskey="n" rel="next">HTML Cross-reference 8-bit Character Expansion</a>, Previous: <a href="HTML-Xref-Node-Name-Expansion.html" accesskey="p" rel="prev">HTML Cross-reference Node Name Expansion</a>, Up: <a href="HTML-Xref.html" accesskey="u" rel="up">HTML Cross-references</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p> |
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| <h4 class="subsection" id="HTML-Cross_002dreference-Command-Expansion">21.4.3 HTML Cross-reference Command Expansion</h4> |
| <a class="index-entry-id" id="index-HTML-cross_002dreferences-3"></a> |
| |
| <p>Node names may contain @-commands (see <a class="pxref" href="Node-Line-Requirements.html"><code class="code">@node</code> Line Requirements</a>). |
| This section describes how they are handled. |
| </p> |
| <p>First, comments are removed. |
| </p> |
| <p>Next, any <code class="code">@value</code> commands (see <a class="pxref" href="_0040set-_0040value.html"><code class="code">@set</code> and <code class="code">@value</code></a>) and |
| macro invocations (see <a class="pxref" href="Invoking-Macros.html">Invoking Macros</a>) are fully expanded. |
| </p> |
| <p>Then, for the following commands, the command name and braces are removed, |
| and the text of the argument is recursively transformed: |
| </p> |
| <div class="example"> |
| <pre class="example-preformatted">@asis @b @cite @code @command @dfn @dmn @dotless |
| @emph @env @file @i @indicateurl @kbd @key |
| @samp @sansserif @sc @slanted @strong @sub @sup |
| @t @U @var @verb @w |
| </pre></div> |
| |
| <p>For <code class="code">@sc</code>, any letters are capitalized. |
| </p> |
| <p>In addition, the following commands are replaced by constant text, as |
| shown below. If any of these commands have non-empty arguments, as in |
| <code class="code">@TeX{bad}</code>, it is an error, and the result is unspecified. |
| In this table, ‘(space)’ means a space character and ‘(nothing)’ means |
| the empty string. The notation ‘U+<var class="var">hhhh</var>’ means Unicode code |
| point <var class="var">hhhh</var> (in hex, as usual). |
| </p> |
| <p>There are further transformations of many of these expansions to yield |
| the final file or other target name, such as space characters to |
| ‘<samp class="samp">-</samp>’, etc., according to the other rules. |
| </p> |
| <table class="multitable"> |
| <tbody><tr><td width="30%"><code class="code">@(newline)</code></td><td width="50%">(space)</td></tr> |
| <tr><td width="30%"><code class="code">@(space)</code></td><td width="50%">(space)</td></tr> |
| <tr><td width="30%"><code class="code">@(tab)</code></td><td width="50%">(space)</td></tr> |
| <tr><td width="30%"><code class="code">@!</code></td><td width="50%">‘<samp class="samp">!</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@*</code></td><td width="50%">(space)</td></tr> |
| <tr><td width="30%"><code class="code">@-</code></td><td width="50%">(nothing)</td></tr> |
| <tr><td width="30%"><code class="code">@.</code></td><td width="50%">‘<samp class="samp">.</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@:</code></td><td width="50%">(nothing)</td></tr> |
| <tr><td width="30%"><code class="code">@?</code></td><td width="50%">‘<samp class="samp">?</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@@</code></td><td width="50%">‘<samp class="samp">@</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@{</code></td><td width="50%">‘<samp class="samp">{</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@}</code></td><td width="50%">‘<samp class="samp">}</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@LaTeX</code></td><td width="50%">‘<samp class="samp">LaTeX</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@TeX</code></td><td width="50%">‘<samp class="samp">TeX</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@arrow</code></td><td width="50%">U+2192</td></tr> |
| <tr><td width="30%"><code class="code">@bullet</code></td><td width="50%">U+2022</td></tr> |
| <tr><td width="30%"><code class="code">@comma</code></td><td width="50%">‘<samp class="samp">,</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@copyright</code></td><td width="50%">U+00A9</td></tr> |
| <tr><td width="30%"><code class="code">@dots</code></td><td width="50%">U+2026</td></tr> |
| <tr><td width="30%"><code class="code">@enddots</code></td><td width="50%">‘<samp class="samp">...</samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@equiv</code></td><td width="50%">U+2261</td></tr> |
| <tr><td width="30%"><code class="code">@error</code></td><td width="50%">‘<samp class="samp">error--></samp>’</td></tr> |
| <tr><td width="30%"><code class="code">@euro</code></td><td width="50%">U+20AC</td></tr> |
| <tr><td width="30%"><code class="code">@exclamdown</code></td><td width="50%">U+00A1</td></tr> |
| <tr><td width="30%"><code class="code">@expansion</code></td><td width="50%">U+21A6</td></tr> |
| <tr><td width="30%"><code class="code">@geq</code></td><td width="50%">U+2265</td></tr> |
| <tr><td width="30%"><code class="code">@leq</code></td><td width="50%">U+2264</td></tr> |
| <tr><td width="30%"><code class="code">@minus</code></td><td width="50%">U+2212</td></tr> |
| <tr><td width="30%"><code class="code">@ordf</code></td><td width="50%">U+00AA</td></tr> |
| <tr><td width="30%"><code class="code">@ordm</code></td><td width="50%">U+00BA</td></tr> |
| <tr><td width="30%"><code class="code">@point</code></td><td width="50%">U+2605</td></tr> |
| <tr><td width="30%"><code class="code">@pounds</code></td><td width="50%">U+00A3</td></tr> |
| <tr><td width="30%"><code class="code">@print</code></td><td width="50%">U+22A3</td></tr> |
| <tr><td width="30%"><code class="code">@questiondown</code></td><td width="50%">U+00BF</td></tr> |
| <tr><td width="30%"><code class="code">@registeredsymbol</code></td><td width="50%">U+00AE</td></tr> |
| <tr><td width="30%"><code class="code">@result</code></td><td width="50%">U+21D2</td></tr> |
| <tr><td width="30%"><code class="code">@textdegree</code></td><td width="50%">U+00B0</td></tr> |
| <tr><td width="30%"><code class="code">@tie</code></td><td width="50%">(space)</td></tr> |
| </tbody> |
| </table> |
| |
| <p>Quotation mark @-commands (<code class="code">@quotedblright{}</code> and the like), |
| are likewise replaced by their Unicode values. Normal quotation |
| <em class="emph">characters</em> (e.g., ASCII ‘ and ’) are not altered. |
| See <a class="xref" href="Inserting-Quotation-Marks.html">Inserting Quotation Marks</a>. |
| </p> |
| <p>Any <code class="code">@acronym</code>, <code class="code">@abbr</code>, <code class="code">@email</code>, and |
| <code class="code">@image</code> commands are replaced by their first argument. (For |
| these commands, all subsequent arguments are optional, and ignored |
| here.) See <a class="xref" href="_0040acronym.html"><code class="code">@acronym</code>{<var class="var">acronym</var>[, <var class="var">meaning</var>]}</a>, and <a class="ref" href="_0040email.html"><code class="code">@email</code>{<var class="var">email-address</var>[, <var class="var">displayed-text</var>]}</a>, and <a class="ref" href="Images.html">Inserting Images</a>. |
| </p> |
| <p>Accents are handled according to the next section. |
| </p> |
| <p>Any other command is an error, and the result is unspecified. |
| </p> |
| |
| </div> |
| <hr> |
| <div class="nav-panel"> |
| <p> |
| Next: <a href="HTML-Xref-8_002dbit-Character-Expansion.html">HTML Cross-reference 8-bit Character Expansion</a>, Previous: <a href="HTML-Xref-Node-Name-Expansion.html">HTML Cross-reference Node Name Expansion</a>, Up: <a href="HTML-Xref.html">HTML Cross-references</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Command-and-Variable-Index.html" title="Index" rel="index">Index</a>]</p> |
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