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
+ should be either 1.1, 1.2 or 2.0 for SRU.
+ Other versions are allowed - for testing
purposes (version negotiation with SRU server).
The version is currently not used for Solr Web Services
</para>