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<div class="section" id="definitions">
<h1>Definitions<a class="headerlink" href="#definitions" title="Permalink to this headline">¶</a></h1>
<p>Buildbot uses some terms and concepts that have specific meanings.</p>
<div class="section" id="repository">
<h2>Repository<a class="headerlink" href="#repository" title="Permalink to this headline">¶</a></h2>
<p>See <a class="reference internal" href="../manual/concepts.html#attr-repository"><span class="std std-ref">Repository</span></a>.</p>
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<h2>Project<a class="headerlink" href="#project" title="Permalink to this headline">¶</a></h2>
<p>See <a class="reference internal" href="../manual/concepts.html#attr-project"><span class="std std-ref">Project</span></a>.</p>
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<div class="section" id="version-control-comparison">
<h2>Version Control Comparison<a class="headerlink" href="#version-control-comparison" title="Permalink to this headline">¶</a></h2>
<p>Buildbot supports a number of version control systems, and they don't all agree
on their terms. This table should help to disambiguate them.</p>
<table border="1" class="docutils">
<colgroup>
<col width="21%" />
<col width="21%" />
<col width="21%" />
<col width="37%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Name</th>
<th class="head">Change</th>
<th class="head">Revision</th>
<th class="head">Branches</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>CVS</td>
<td>patch [1]</td>
<td>timestamp</td>
<td>unnamed</td>
</tr>
<tr class="row-odd"><td>Subversion</td>
<td>revision</td>
<td>integer</td>
<td>directories</td>
</tr>
<tr class="row-even"><td>Git</td>
<td>commit</td>
<td>sha1 hash</td>
<td>named refs</td>
</tr>
<tr class="row-odd"><td>Mercurial</td>
<td>changeset</td>
<td>sha1 hash</td>
<td>different repos
or (permanently)
named commits</td>
</tr>
<tr class="row-even"><td>Darcs</td>
<td>?</td>
<td>none [2]</td>
<td>different repos</td>
</tr>
<tr class="row-odd"><td>Bazaar</td>
<td>?</td>
<td>?</td>
<td>?</td>
</tr>
<tr class="row-even"><td>Perforce</td>
<td>?</td>
<td>?</td>
<td>?</td>
</tr>
<tr class="row-odd"><td>BitKeeper</td>
<td>changeset</td>
<td>?</td>
<td>different repos</td>
</tr>
</tbody>
</table>
<ul class="simple">
<li>[1] note that CVS only tracks patches to individual files. Buildbot tries to
recognize coordinated changes to multiple files by correlating change times.</li>
<li>[2] Darcs does not have a concise way of representing a particular revision
of the source.</li>
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