enhance text indexing in GraphDB

[turbomam]

• should we be using a Full Text Index, which would require some configuration?
• What predicate/slot IRIs should we included in the autocomplete index? (That's basically all there is to configure that index)

Index-able slots in the schema

search at https://graphdb-dev.microbiomedata.org/sparql

prefix schema: <https://w3id.org/nmdc/nmdc>
prefix mongodb: <mongodb://mongo-loadbalancer.nmdc.production.svc.spin.nersc.gov:27017>
select ?graph ?predicate (count(?s) as ?scount)
where {
    values ?graph {
        schema: mongodb: 
    }
    graph ?graph {
        ?s ?predicate ?o .
    }
    filter(isliteral(?o))
}
group by ?graph ?predicate
order by ?graph desc(count(?s))

[turbomam]

• dcterms:description
• dcterms:title
• rdfs :label
• skos:altLabel
• skos:definition
• nmdc:name
• nmdc:title

plus the URIs, which contain the schema element names and the data identifiers