Extensible SPARQL Functions with Embedded Javascript

Abstract. The SPARQL Query Language allows filtering of query results through arbitrary predicate expressions. Such expressions may invoke custom functions identified with IRIs, but the SPARQL implementation used must support the identified function. We present an extensible approach to allowing arbitrary function implementations using functions identified with URLs. We provide an example using Javascript functions, show how such a system can be implemented in the Perl based RDF::Query SPARQL implementation and discuss security concerns.

• Type: Conference
• Year: 2007
• Where: ESWS
• Authors: Greg Williams
• Keywords: Arbitrary Function Implementations, Arbitrary Predicate Expressions, ESWS 2007, SPARQL Query Language