[Virtuoso-users] SPARQL cursor in Virtuoso/PL

[Peter L. <pet...@in...>]

I have a simple Virtuoso/PL stored procedure in which I want to bind a
variable (URI) into the SPARQL cursor. BTW the purpose is to generate a
graph_group procedurally from a graph that expresses the group as
owl:imports.


create procedure create_graph_group (in graphGroup varchar

  in *aggregateGraph *varchar )

{

  DB.DBA.RDF_GRAPH_GROUP_DROP(graphGroup , 1);

  DB.DBA.RDF_GRAPH_GROUP_CREATE (graphGroup , 1);

  for (SPARQL

     SELECT distinct  ?graph

     WHERE {

     ?graphGroup a owl:Ontology  .

     ?graphGroup owl:imports*  ?graph .

     FILTER(?graphGroup = *?:**aggregateGraph* )

     }

  ) do  {

    DB.DBA.RDF_GRAPH_GROUP_INS (graphGroup , graph);

   }

return aggregateGraph ;

};

The questions I have are:

   1. Is the above syntax correct for a bound variable in a SPARQL cursor:
   *?:**aggregateGraph*
   2. In this context I need to bind an URI, not a string. How can I force
   a PL variable to be of datatype SPARQL URI/IRI?

Many thanks

*Peter J. Lawrence*
*inova8*
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