- <para>Selects SRU method. Must be one of <literal>POST</literal>,
- <literal>GET</literal>, <literal>SOAP</literal> (default).
+ <para>Selects Web Service method and version.
+ Must be one of <literal>POST</literal>,
+ <literal>GET</literal>, <literal>SOAP</literal> (default)
+ or <literal>SOLR</literal>. Version
+ should be either 1.1 or 1.2 for SRU. Other versions are allowed - for testing
+ purposes (version negotiation with SRU server).
+ The version is currently not used for SOLR Web Services