backend: support external SPARQL and named-graph snapshots

backend_go/selection_queries/subclasses.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"fmt"
 	"strings"
+
+	"visualizador_instanciados/backend_go/queryscope"
 )
 
 func subclassesQuery(selectedNodes []NodeRef, includeBNodes bool) string {
@@ -26,20 +28,33 @@ func subclassesQuery(selectedNodes []NodeRef, includeBNodes bool) string {
 	}
 
 	values := strings.Join(valuesTerms, " ")
+	pattern := queryscope.NamedGraph(fmt.Sprintf(`
+{
+VALUES ?sel { %s }
+VALUES ?p { rdfs:subClassOf }
+?s ?p ?sel .
+BIND(?sel AS ?o)
+}
+UNION
+{
+VALUES ?sel { %s }
+VALUES ?p { <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> }
+?s ?p ?sel .
+BIND(?sel AS ?o)
+}
+`, values, values))
+
 	return fmt.Sprintf(`
 PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
 SELECT DISTINCT ?s ?p ?o
 WHERE {
-  VALUES ?sel { %s }
-  VALUES ?p { rdfs:subClassOf }
-  ?s ?p ?sel .
-  BIND(?sel AS ?o)
+%s
   FILTER(!isLiteral(?o))
   FILTER(?s != ?o)
   %s
 }
-`, values, bnodeFilter)
+`, pattern, bnodeFilter)
 }
 
 func runSubclasses(ctx context.Context, q Querier, idx Index, selectedIDs []uint32, includeBNodes bool) (Result, error) {