Fields for fulltext indexing

We need to define the set of fields which should be processed through a fulltext search indexing pipeline in order for implementations to provide such functionality.

This is less relevant in RDF, where the "client" app crawls the web to retrieve all data prior to query execution. In actual client/server or distributed implementations, the search lookups need to be performed from the "server" side of the relationship.

As a base, skos:note and any vf:name fields should be included. We need to detail any record-specific fields that need to be indexed in addition to these.