9 User-Defined Inferencing and Querying

RDF Graph extension architectures enable the addition of user-defined capabilities.

Effective with Oracle Database 12c Release 1 (12.1):

• The inference extension architecture enables you to add user-defined inferencing to the presupplied inferencing support.

• The query extension architecture enables you to add user-defined functions and aggregates to be used in SPARQL queries, both through the SEM_MATCH table function and through the support for Apache Jena.

Note:

The capabilities described in this chapter are intended for advanced users. You are assumed to be familiar with the main concepts and techniques described in RDF Graph Overview and OWL Concepts .

• User-Defined Inferencing
  The RDF Graph inference extension architecture enables you to add user-defined inferencing to the presupplied inferencing support.
• User-Defined Functions and Aggregates
  The RDF Graph query extension architecture enables you to add user-defined functions and aggregates to be used in SPARQL queries, both through the SEM_MATCH table function and through the support for Apache Jena.