h">branch</a> that is used by a developer to
identify a conceptual line of development. Since branches are very easy
and inexpensive, it is often desirable to have several small branches
that each contain very well defined concepts or small incremental yet
related changes.</p>
</dd>
<dt class="hdlist1"><a id="def_tree"></a>tree</dt>
<dd>
<p>Either a <a href="#def_working_tree">working tree</a>, or a <a href="#def_tree_object">tree
object</a> together with the dependent <a href="#def_blob_object">blob</a> an