PrefixInclusionType

The PrefixInclusionType interface allows to specify how to include the prefixes in serialized requests.

This interface is used when creating a SPARQLRequest.

Type values

The values of the interface are:

• The PrefixInclusionType.NOT_INCLUDE specifies that the prefixes will not be included
• The PrefixInclusionType.INCLUDE specifies that the prefixes will be included. The SparqlHelperConfig.getDefaultPrefixDeclarations() will be used if available (ie if it is not null)
• The PrefixInclusionType.DEFAULT specifies that it will use the SparqlHelperConfig.getDefaultPrefixDeclarations() will be used if available (ie if it is not null), else no prefix will be included

Examples

Not including the prefixes

By default SPARQL requests created by the framework do not include the prefix declarations.

For example suppose the following code:

   SparqlRequest request = new SparqlRequest("sitac");
   request.addSelect("zone");
   request.addType("zone", "TaskZone");
   request.addPropertyValue("zone", "isTasked", true);
   String sparql = request.getSPARQL();

The result will be:

   SELECT ?zone
   WHERE {
     ?zone rdf:type sitac:TaskZone .
     ?zone sitac:isTasked "true" .
   }

It is the same result as with:

   SparqlRequest request = new SparqlRequest("sitac", PrefixInclusionType.NOT_INCLUDE);
   request.addSelect("zone");
   request.addType("zone", "TaskZone");
   request.addPropertyValue("zone", "isTasked", true);
   String sparql = request.getSPARQL();

Including the prefixes

Suppose the following code:

   SparqlRequest request = new SparqlRequest("sitac", PrefixInclusionType.INCLUDE);
   request.addSelect("zone");
   request.addType("zone", "TaskZone");
   request.addPropertyValue("zone", "isTasked", true);
   String sparql = request.getSPARQL();

The result will be:

   PREFIX owl: <http://www.w3.org/2002/07/owl#>
   PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
   PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
   PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>      
   SELECT ?zone
   WHERE {
     ?zone rdf:type sitac:TaskZone .
     ?zone sitac:isTasked "true" .
   }