+ Finally, this example configuration can be queried using PQF
+ queries, either transported by Z39.50, (here using a yaz-client)
+ <screen>
+ <![CDATA[
+ Z> open localhost:9999
+ Z> elem dc
+ Z> form xml
+ Z>
+ Z> f @attr 1=dc:creator Kumar
+ Z> scan @attr 1=dc:creator adam
+ Z>
+ Z> f @attr 1=dc:title @attr 4=2 "proceeding congress superconductivity"
+ Z> scan @attr 1=dc:title abc
+ ]]>
+ </screen>
+ or the proprietary
+ extentions <literal>x-pquery</literal> and
+ <literal>x-pScanClause</literal> to
+ SRU, and SRW
+ <screen>
+ <![CDATA[
+ http://localhost:9999/?version=1.1&operation=searchRetrieve&x-pquery=%40attr+1%3Ddc%3Acreator+%40attr+4%3D6+%22the
+ http://localhost:9999/?version=1.1&operation=scan&x-pScanClause=@attr+1=dc:date+@attr+4=2+a
+ ]]>
+ </screen>
+ See <xref linkend="server-sru"/> for more information on SRU/SRW
+ configuration, and <xref linkend="gfs-config"/> or
+ <ulink url="http://www.indexdata.dk/yaz/doc/tools.tkl#tools.cql">
+ the YAZ manual CQL section</ulink>
+ for the details
+ of the YAZ frontend server
+ <ulink url="&url.cql;">CQL</ulink>
+ configuration.
+ </para>
+ <para>