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<p>There are two types of documentation, namely markdown files and API usage
reference. This guideline introduces some tools and instruction in preparing the
source markdown files and API comments.</p>
<p>The markdown files will be built into HTML pages via
<a href="https://docusaurus.io/">Docusaurus</a>; The API comments (from the source code)
will be used to generate API reference pages using Sphinx (for Python) and
Doxygen (for CPP).</p>
<h2><a class="anchor" aria-hidden="true" id="markdown-files"></a><a href="#markdown-files" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Markdown Files</h2>
<p>Try to follow the
<a href="https://developers.google.com/style">Google Documentation style</a>. For example,</p>
<ol>
<li>Remove 'please' from an instruction. 'Please click...' VS 'Click ...'.</li>
<li>Follow the
<a href="https://owl.purdue.edu/owl/general_writing/mechanics/help_with_capitals.html">standard captitalization rules</a>.</li>
<li>Use 'you' instead of 'we' in the instructions.</li>
<li>Use present tense and avoid 'will'</li>
<li>Prefer active voice than passive voice.</li>
</ol>
<p>In addition, to make the documentation consistent,</p>
<ol>
<li>Keep the line short, e.g., length&lt;=80</li>
<li>Use the relative path assuming that we are in the root folder of the repo,
e.g., <code>doc-site/docs</code> refers to <code>singa-doc/docs-site/docs</code></li>
<li>Higlight the command, path, class function and variable using backticks,
e.g., <code>Tensor</code>, <code>singa-doc/docs-site/docs</code>.</li>
<li>To hightlight other terms/concepts, use <em>graph</em> or <strong>graph</strong></li>
</ol>
<p>The <a href="https://prettier.io/">prettier tool</a> used by this project will auto-format
the code according to the
<a href="https://github.com/apache/singa-doc/blob/master/docs-site/.prettierrc">configuration</a>
when we do <code>git commit</code>. For example, it will wrap the text in the markdown file
to at most 80 characters (except the lines for comments).</p>
<p>When introducing a concept (e.g., the <code>Tensor</code> class), provide the overview (the
purpose and relation to other concepts), APIs and examples. Google colab can be
used to demonstrate the usage.</p>
<p>Refer to <a href="https://github.com/apache/singa-doc/tree/master/docs-site">this page</a>
for the details on how to edit the markdown files and build the website.</p>
<h2><a class="anchor" aria-hidden="true" id="api-references"></a><a href="#api-references" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>API References</h2>
<h3><a class="anchor" aria-hidden="true" id="cpp-api"></a><a href="#cpp-api" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>CPP API</h3>
<p>Follow the
<a href="https://google.github.io/styleguide/cppguide.html#Comments">Google CPP Comments Style</a>.</p>
<p>To generate docs, run &quot;doxygen&quot; from the doc folder (Doxygen &gt;= 1.8 recommended)</p>
<h3><a class="anchor" aria-hidden="true" id="python-api"></a><a href="#python-api" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Python API</h3>
<p>Follow the
<a href="http://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings">Google Python DocString Style</a>.</p>
<h2><a class="anchor" aria-hidden="true" id="visual-studio-code-vscode"></a><a href="#visual-studio-code-vscode" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Visual Studio Code (vscode)</h2>
<p>If you use vscode as the editor, the following plugins are useful.</p>
<h3><a class="anchor" aria-hidden="true" id="docstring-snippet"></a><a href="#docstring-snippet" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Docstring Snippet</h3>
<p><a href="https://marketplace.visualstudio.com/items?itemName=njpwerner.autodocstring">autoDocstring</a>
generates the docstring of functions, classes, etc. Choose the DocString Format
to <code>google</code>.</p>
<h3><a class="anchor" aria-hidden="true" id="spell-check"></a><a href="#spell-check" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Spell Check</h3>
<p><a href="https://marketplace.visualstudio.com/items?itemName=streetsidesoftware.code-spell-checker">Code Spell Checker</a>
can be configured to check the comments of the code, or .md and .rst files.</p>
<p>To do spell check only for comments of Python code, add the following snippet
via <code>File - Preferences - User Snippets - python.json</code></p>
<pre><code class="hljs">&quot;cspell check&quot; : {
&quot;prefix&quot;: &quot;cspell&quot;,
&quot;body&quot;: [
    &quot;# Directives for doing spell check only for python and c/cpp comments&quot;,
    &quot;# cSpell:includeRegExp #.* &quot;,
    &quot;# cSpell:includeRegExp (\&quot;\&quot;\&quot;|''')[^\1]*\1&quot;,
    &quot;# cSpell: CStyleComment&quot;,
],
&quot;description&quot;: &quot;# spell check only for python comments&quot;
}
</code></pre>
<p>To do spell check only for comments of Cpp code, add the following snippet via
<code>File - Preferences - User Snippets - cpp.json</code></p>
<pre><code class="hljs">&quot;cspell check&quot; : {
&quot;prefix&quot;: &quot;cspell&quot;,
&quot;body&quot;: [
    &quot;// Directive for doing spell check only for cpp comments&quot;,
    &quot;// cSpell:includeRegExp CStyleComment&quot;,
],
&quot;description&quot;: &quot;# spell check only for cpp comments&quot;
}
</code></pre>
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