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<h3 class="section">6.1 Titles</h3>
<p>To easily find a note, a title needs to be prescribed to a note. A note can have
many titles: this allows a note to be referred to by different names, which is
especially useful for topics or concepts with acronyms. For example, for a note
like &ldquo;World War 2&rdquo;, it may be desirable to also refer to it using the acronym
&ldquo;WWII&rdquo;.
</p>
<p>Org-roam calls <code>org-roam--extract-titles</code> to extract titles. It uses the
variable <code>org-roam-title-sources</code>, to control how the titles are extracted. The
title extraction methods supported are:
</p>
<ol>
<li> <code>'title</code>: This extracts the title using the file <code>#+title</code> property
</li><li> <code>'headline</code>: This extracts the title from the first headline in the Org file
</li><li> <code>'alias</code>: This extracts a list of titles using the <code>#+roam_alias</code> property.
The aliases are space-delimited, and can be multi-worded using quotes
</li></ol>
<p>Take for example the following org file:
</p>
<div class="example">
<pre class="example">#+title: World War 2
#+roam_alias: &quot;WWII&quot; &quot;World War II&quot;
* Headline
</pre></div>
<table>
<thead><tr><th>Method</th><th>Titles</th></tr></thead>
<tr><td><code>'title</code></td><td>&rsquo;(&ldquo;World War 2&rdquo;)</td></tr>
<tr><td><code>'headline</code></td><td>&rsquo;(&ldquo;Headline&rdquo;)</td></tr>
<tr><td><code>'alias</code></td><td>&rsquo;(&ldquo;WWII&rdquo; &ldquo;World War II&rdquo;)</td></tr>
</table>
<p>One can freely control which extraction methods to use by customizing
<code>org-roam-title-sources</code>: see the doc-string for the variable for more
information. If all methods of title extraction return no results, the file-name
is used in place of the titles for completions.
</p>
<p>If you wish to add your own title extraction method, you may push a symbol
<code>'foo</code> into <code>org-roam-title-sources</code>, and define a
<code>org-roam--extract-titles-foo</code> which accepts no arguments. See
<code>org-roam--extract-titles-title</code> for an example.
</p>
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