Link - RDF API for PHP ( RAP )
Updated Sept 24 2008: added features and SWCL link
The RAP project ( that is RDF API for PHP ) has a type of inference engine based on the RAP InfModel class. This implements both forward and backward chaining through a network of relationship as eressed by RDF triples. Some OWL entailments are also implemented. It has rule engine features but is not really a rule engine - can it be extended from relationships to conditions/actions ?
List of features and links from the RAP site:
- statement-centric methods for manipulating an RDF model as a set of RDF triples
- resource-centric methods for manipulating an RDF model as a set of resources
- ontology-centric methods for manipulating an RDF model through vocabulary specific methods
- quad- and named graph-centric methods for manipulating RDF datasets
- integrated RDF/XML, N3, N-TRIPLE, TriX, GRDDL, RSS parser
- integrated RDF/XML, N3, N-TRIPLE, TriX serializer
- in-memory or database model storage
- SPARQL query engine supporting all features of the W3C SPARQL Recommendation
- SPARQL client library
- RDQL query engine
- inference engine supporting RDF-Schema reasoning and some OWL entailments
- integrated RDF server providing similar functionality as the Joseki RDF server
- integrated linked data frontend
- graphical user-interface for managing database-backed RDF models
- support for common vocabularies
- drawing graph visualizations