Being a Drupal newcomer, I am working on two projects where we would like to consume defined and existing RDF-data in the search query coming out of our library catalogue (using Drupal). Our main aim is to query a RDF-container and then display a result-set of records from our catalogue. The records to be displayed from our catalogue will contain the ID of the "found" RDF-data-element.
RDF-core in Drupal7 seems to do what we want, but I need to give further specifications to several of our partners and I lack the detailed information so far.
One core question is, if to query an "RDF-data-container" RDF-core would be sufficient, or if there are other modules / technical features to be involved, e.g. SPARQL or any other? As far as I understood from other discussion threads here, there are different possibilities, including Apache solr which we use already. Any help would be appreciated.
The databases contain over 1 million records.
thanks for any input or help