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<div class="section" id="differences-to-the-latex-markup">
<h1>5. Differences to the LaTeX markup<a class="headerlink" href="#differences-to-the-latex-markup" title="Permalink to this headline">¶</a></h1>
<p>Though the markup language is different, most of the concepts and markup types
of the old LaTeX docs have been kept – environments as reST directives, inline
commands as reST roles and so forth.</p>
<p>However, there are some differences in the way these work, partly due to the
differences in the markup languages, partly due to improvements in Sphinx. This
section lists these differences, in order to give those familiar with the old
format a quick overview of what they might run into.</p>
<div class="section" id="inline-markup">
<h2>5.1. Inline markup<a class="headerlink" href="#inline-markup" title="Permalink to this headline">¶</a></h2>
<p>These changes have been made to inline markup:</p>
<ul>
<li><p class="first"><strong>Cross-reference roles</strong></p>
<p>Most of the following semantic roles existed previously as inline commands,
but didn’t do anything except formatting the content as code. Now, they
cross-reference to known targets (some names have also been shortened):</p>
<div class="line-block">
<div class="line"><em>mod</em> (previously <em>refmodule</em> or <em>module</em>)</div>
<div class="line"><em>func</em> (previously <em>function</em>)</div>
<div class="line"><em>data</em> (new)</div>
<div class="line"><em>const</em></div>
<div class="line"><em>class</em></div>
<div class="line"><em>meth</em> (previously <em>method</em>)</div>
<div class="line"><em>attr</em> (previously <em>member</em>)</div>
<div class="line"><em>exc</em> (previously <em>exception</em>)</div>
<div class="line"><em>cdata</em></div>
<div class="line"><em>cfunc</em> (previously <em>cfunction</em>)</div>
<div class="line"><em>cmacro</em> (previously <em>csimplemacro</em>)</div>
<div class="line"><em>ctype</em></div>
</div>
<p>Also different is the handling of <em>func</em> and <em>meth</em>: while previously
parentheses were added to the callable name (like <tt class="docutils literal"><span class="pre">\func{str()}</span></tt>), they are
now appended by the build system – appending them in the source will result
in double parentheses. This also means that <tt class="docutils literal"><span class="pre">:func:`str(object)`</span></tt> will not
work as expected – use <tt class="docutils literal"><span class="pre">``str(object)``</span></tt> instead!</p>
</li>
<li><p class="first"><strong>Inline commands implemented as directives</strong></p>
<p>These were inline commands in LaTeX, but are now directives in reST:</p>
<div class="line-block">
<div class="line"><em>deprecated</em></div>
<div class="line"><em>versionadded</em></div>
<div class="line"><em>versionchanged</em></div>
</div>
<p>These are used like so:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">deprecated</span><span class="p">::</span> <span class="k">2.5</span>
Reason of deprecation.
</pre></div>
</div>
<p>Also, no period is appended to the text for <em>versionadded</em> and
<em>versionchanged</em>.</p>
<div class="line-block">
<div class="line"><em>note</em></div>
<div class="line"><em>warning</em></div>
</div>
<p>These are used like so:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">note</span><span class="p">::</span>
Content of note.
</pre></div>
</div>
</li>
<li><p class="first"><strong>Otherwise changed commands</strong></p>
<p>The <em>samp</em> command previously formatted code and added quotation marks around
it. The <em>samp</em> role, however, features a new highlighting system just like
<em>file</em> does:</p>
<blockquote>
<p><tt class="docutils literal"><span class="pre">:samp:`open({filename},</span> <span class="pre">{mode})`</span></tt> results in <tt class="docutils literal"><span class="pre">open(</span><em><span class="pre">filename</span></em><span class="pre">,</span> <em><span class="pre">mode</span></em><span class="pre">)</span></tt></p>
</blockquote>
</li>
<li><p class="first"><strong>Dropped commands</strong></p>
<p>These were commands in LaTeX, but are not available as roles:</p>
<div class="line-block">
<div class="line"><em>bfcode</em></div>
<div class="line"><em>character</em> (use <tt class="docutils literal"><span class="pre">``'c'``</span></tt>)</div>
<div class="line"><em>citetitle</em> (use <tt class="docutils literal"><span class="pre">`Title</span> <span class="pre"><URL>`_</span></tt>)</div>
<div class="line"><em>code</em> (use <tt class="docutils literal"><span class="pre">``code``</span></tt>)</div>
<div class="line"><em>email</em> (just write the address in body text)</div>
<div class="line"><em>filenq</em></div>
<div class="line"><em>filevar</em> (use the <tt class="docutils literal"><span class="pre">{...}</span></tt> highlighting feature of <em>file</em>)</div>
<div class="line"><em>programopt</em>, <em>longprogramopt</em> (use <em>option</em>)</div>
<div class="line"><em>ulink</em> (use <tt class="docutils literal"><span class="pre">`Title</span> <span class="pre"><URL>`_</span></tt>)</div>
<div class="line"><em>url</em> (just write the URL in body text)</div>
<div class="line"><em>var</em> (use <tt class="docutils literal"><span class="pre">*var*</span></tt>)</div>
<div class="line"><em>infinity</em>, <em>plusminus</em> (use the Unicode character)</div>
<div class="line"><em>shortversion</em>, <em>version</em> (use the <tt class="docutils literal"><span class="pre">|version|</span></tt> and <tt class="docutils literal"><span class="pre">|release|</span></tt> substitutions)</div>
<div class="line"><em>emph</em>, <em>strong</em> (use the reST markup)</div>
</div>
</li>
<li><p class="first"><strong>Backslash escaping</strong></p>
<p>In reST, a backslash must be escaped in normal text, and in the content of
roles. However, in code literals and literal blocks, it must not be escaped.
Example: <tt class="docutils literal"><span class="pre">:file:`C:\\Temp\\my.tmp`</span></tt> vs. <tt class="docutils literal"><span class="pre">``open("C:\Temp\my.tmp")``</span></tt>.</p>
</li>
</ul>
</div>
<div class="section" id="information-units">
<h2>5.2. Information units<a class="headerlink" href="#information-units" title="Permalink to this headline">¶</a></h2>
<p>Information units (<em>...desc</em> environments) have been made reST directives.
These changes to information units should be noted:</p>
<ul>
<li><p class="first"><strong>New names</strong></p>
<p>“desc” has been removed from every name. Additionally, these directives have
new names:</p>
<div class="line-block">
<div class="line"><em>cfunction</em> (previously <em>cfuncdesc</em>)</div>
<div class="line"><em>cmacro</em> (previously <em>csimplemacrodesc</em>)</div>
<div class="line"><em>exception</em> (previously <em>excdesc</em>)</div>
<div class="line"><em>function</em> (previously <em>funcdesc</em>)</div>
<div class="line"><em>attribute</em> (previously <em>memberdesc</em>)</div>
</div>
<p>The <em>classdesc*</em> and <em>excclassdesc</em> environments have been dropped, the
<em>class</em> and <em>exception</em> directives support classes documented with and without
constructor arguments.</p>
</li>
<li><p class="first"><strong>Multiple objects</strong></p>
<p>The equivalent of the <em>...line</em> commands is:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">function</span><span class="p">::</span> <span class="k">do_foo(bar)</span>
do_bar(baz)
Description of the functions.
</pre></div>
</div>
<p>IOW, just give one signatures per line, at the same indentation level.</p>
</li>
<li><p class="first"><strong>Arguments</strong></p>
<p>There is no <em>optional</em> command. Just give function signatures like they
should appear in the output:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">function</span><span class="p">::</span> <span class="k">open(filename[, mode[, buffering]])</span>
Description.
</pre></div>
</div>
<p>Note: markup in the signature is not supported.</p>
</li>
<li><p class="first"><strong>Indexing</strong></p>
<p>The <em>...descni</em> environments have been dropped. To mark an information unit
as unsuitable for index entry generation, use the <em>noindex</em> option like so:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">function</span><span class="p">::</span> <span class="k">foo_*</span>
:noindex:
Description.
</pre></div>
</div>
</li>
<li><p class="first"><strong>New information units</strong></p>
<p>There are new generic information units: One is called “describe” and can be
used to document things that are not covered by the other units:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">describe</span><span class="p">::</span> <span class="k">a == b</span>
The equals operator.
</pre></div>
</div>
<p>The others are:</p>
<div class="highlight-rest"><div class="highlight"><pre><span class="p">..</span> <span class="ow">cmdoption</span><span class="p">::</span> <span class="k">-O</span>
Describes a command-line option.
<span class="p">..</span> <span class="ow">envvar</span><span class="p">::</span> <span class="k">PYTHONINSPECT</span>
Describes an environment variable.
</pre></div>
</div>
</li>
</ul>
</div>
<div class="section" id="structure">
<h2>5.3. Structure<a class="headerlink" href="#structure" title="Permalink to this headline">¶</a></h2>
<p>The LaTeX docs were split in several toplevel manuals. Now, all files are part
of the same documentation tree, as indicated by the <em>toctree</em> directives in the
sources (though individual output formats may choose to split them up into parts
again). Every <em>toctree</em> directive embeds other files as subdocuments of the
current file (this structure is not necessarily mirrored in the filesystem
layout). The toplevel file is <tt class="docutils literal"><span class="pre">contents.rst</span></tt>.</p>
<p>However, most of the old directory structure has been kept, with the
directories renamed as follows:</p>
<ul class="simple">
<li><tt class="docutils literal"><span class="pre">api</span></tt> -> <tt class="docutils literal"><span class="pre">c-api</span></tt></li>
<li><tt class="docutils literal"><span class="pre">dist</span></tt> -> <tt class="docutils literal"><span class="pre">distutils</span></tt>, with the single TeX file split up</li>
<li><tt class="docutils literal"><span class="pre">doc</span></tt> -> <tt class="docutils literal"><span class="pre">documenting</span></tt></li>
<li><tt class="docutils literal"><span class="pre">ext</span></tt> -> <tt class="docutils literal"><span class="pre">extending</span></tt></li>
<li><tt class="docutils literal"><span class="pre">inst</span></tt> -> <tt class="docutils literal"><span class="pre">installing</span></tt></li>
<li><tt class="docutils literal"><span class="pre">lib</span></tt> -> <tt class="docutils literal"><span class="pre">library</span></tt></li>
<li><tt class="docutils literal"><span class="pre">mac</span></tt> -> merged into <tt class="docutils literal"><span class="pre">library</span></tt>, with <tt class="docutils literal"><span class="pre">mac/using.tex</span></tt>
moved to <tt class="docutils literal"><span class="pre">using/mac.rst</span></tt></li>
<li><tt class="docutils literal"><span class="pre">ref</span></tt> -> <tt class="docutils literal"><span class="pre">reference</span></tt></li>
<li><tt class="docutils literal"><span class="pre">tut</span></tt> -> <tt class="docutils literal"><span class="pre">tutorial</span></tt>, with the single TeX file split up</li>
</ul>
</div>
</div>
</div>
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<li><a class="reference external" href="#">5. Differences to the LaTeX markup</a><ul>
<li><a class="reference external" href="#inline-markup">5.1. Inline markup</a></li>
<li><a class="reference external" href="#information-units">5.2. Information units</a></li>
<li><a class="reference external" href="#structure">5.3. Structure</a></li>
</ul>
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</ul>
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