<a href="#def_chain">chain</a>.</p>
</dd>
<dt class="hdlist1"><a id="def_tag_object"></a>tag object</dt>
<dd>
<p>An <a href="#def_object">object</a> containing a <a href="#def_ref">ref</a> pointing to
another object, which can contain a message just like a
<a href="#def_commit_object">commit object</a>. It can also contain a (PGP)
signature, in which case it is called a "signed tag object".</p>
</dd>
<dt class="hdlist1"><a id="def_topic_branch"></a>topic branch</dt>
<dd>
<p>A regular Git <a href="#def_branc