- Facets operations is not part of the official ZOOM specification, but
- is an Index Data extension for YAZ-based Z39.50 targets or
- <ulink url="&url.solr;">Solr</ulink> targets.
- In case the target can and is requested to return facets, using a
- result set the ZOOM client can request one or all facet fields.
- Using a facet field the client can request the term count and then
- interate over the terms.
+ Facet operations is not part of the official ZOOM specification, but
+ is an Index Data extension for YAZ-based Z39.50 targets,
+ <ulink url="&url.solr;">Solr</ulink> and SRU 2.0 targets.
+
+ Facets may be requestd by the
+ <link linkend="zoom.facets.option">facets</link> option before a
+ search is sent.
+ For inspection of the returned facets, the following functions are
+ available: