+
+ <varlistentry>
+ <term>mergekey</term>
+ <listitem>
+ <para>
+ Sets mergekey for this show and rest of session, or until
+ another mergekey is given for show/search. The mergekey value is a
+ comma separated list with one or more names as they appear
+ in the service description equivalent to
+ <literal>mergekey="optional"</literal> inside a metadata element.
+ If the empty string is given for mergekey it is disabled
+ and rest of session will use the default mergekey from service
+ or stylesheet.
+ </para>
+ <para>
+ This facility, "dynamic mergekey", appeared in Pazpar2 version
+ 1.6.31.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>rank</term>
+ <listitem>
+ <para>
+ Sets rank method this show and rest of session, or until
+ another rank is given for show/search. The rank value is a
+ comma separated list of pairs field=value pairs. The
+ format is the same as
+ <xref linkend="metadata-rank">rank</xref> for a metadata element.
+ If the empty string is given for rank it is disabled
+ and rest of session will use the default rank from metadata or
+ stylesheet.
+ </para>
+ <para>
+ This facility, "dynamic ranking", appeared in Pazpar2 version
+ 1.6.31.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>snippets</term>
+ <listitem>
+ <para>
+ If specified and set to 1 data will include snippets marked
+ with <match> tags. Otherwise snippets will not be included.
+ </para>
+ <para>
+ This facility, "snippets", appeared in Pazpar2 version
+ 1.6.32.
+ </para>
+ </listitem>
+ </varlistentry>
+