- substring (value) given. If value is omitted all records with the
- metadata present will be included.
+ substring (~value) given, or matches exactly (=value). If value is omitted all records
+ with the named
+ metadata element present will be included.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>pz:termlist_term_count</term>
+ <listitem>
+ <para>
+ Specifies that the target should return up to n terms for each facets (where termlist="yes"). This implies
+ that the target can return facets on the search command. Requesting facets on targets that doesn't,
+ will return unpredictable or error result.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>pz:termlist_term_sort</term>
+ <listitem>
+ <para>
+ Specifies how the terms should be sorted. (Not yet implemented)
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>pz:preferred</term>
+ <listitem>
+ <para>
+ Specifies that a target is preferred, e.g. possible local, faster target. Using block=pref on show command
+ will wait for all these targets to return records before releasing the block. If no target is preferred,
+ the block=pref will identical to block=1, which release when one target has returned records.