<?xml version="1.0" encoding="UTF-8"?>
<variablelist>
	<varlistentry>
		<term>HEAD</term>
		<listitem>
			<para>The latest revision in the repository.</para>
		</listitem>
	</varlistentry>
	<varlistentry>
		<term>BASE</term>
		<listitem>
			<para>The &quot;pristine&quot; revision of an item in a working copy.</para>
		</listitem>
	</varlistentry>
	<varlistentry>
		<term>COMMITTED</term>
		<listitem>
			<para>The last revision in which an item changed before (or at) BASE.</para>
		</listitem>
	</varlistentry>
	<varlistentry>
		<term>PREV</term>
		<listitem>
			<para>The revision just before the last revision in which an item changed. (Technically,
					<command>COMMITTED - 1</command>.)</para>
		</listitem>
	</varlistentry>
</variablelist>
