Part of case collection for federated queries.

Case_6_2.txt

PREFIX ontology_1: <http://ontology_1/>
PREFIX ontology_2: <http://ontology_2/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
select distinct ?aNote ?bNote ?cNote where {
    {
        service <https://graphdb.nasarek.org/repositories/Adapter_1> 
        {
            ?A rdf:type ontology_1:E21_Person .
            OPTIONAL {
                ?A ontology_1:P1_is_identified_by ?a .
                ?a ontology_1:P3_has_note ?aNote .
            }
            OPTIONAL {
                ?A ontology_1:P2_has_type ?b .
                ?b ontology_1:P3_has_note ?bNote .
            }      
        }
    } UNION {
        service <https://graphdb.nasarek.org/repositories/Adapter_3> 
        {
            ?B rdf:type ontology_1:E20_Biological_Object .
            OPTIONAL {
                ?B ontology_1:P1_is_identified_by ?a .
                ?a ontology_1:P3_has_note ?aNote .
            }
            OPTIONAL {
                ?B ontology_1:P56_bears_feature ?c .
                ?c ontology_1:P3_has_note ?cNote .
            }
        }
    }
}