Index more fields for autocomplete suggester

[Twan Goosen]

Currently only the record titles get indexed for the suggester (which is the datasource of the autocomplete functionality of the free text search in the VLO web app). It would be nice to include more fields, such as keyword, genre, subject, language, country, ... The exact choice could be discussed within the CLARIN-D VLO taskforce.

Technically the implementation is straightforward. See the following snippet from schema.xml (revision 5517):

 <fields>
   [...]
   <!-- Field for autocompletion (suggester) -->
   <field name="_suggester" type="textauto" indexed="true" stored="false"/>
   <copyField source="name" dest="_suggester"/>
</fields>

extending this should be a matter of adding more sources.

[teckart@informatik.uni-leipzig.de]

Commited to trunk (r5888), the complete content of the file is now used for autocompletion, no obvious problems after some checks on a test instance