2
votes
2answers
48 views
What are the semantics of 2nd order predicates in RDF rule languages
RDF rule dialects (such as the now recommended RIF dialects) seem to allow variables for predicate symbols. This seems counter-intuitive since datalog and horn clause languages in …
8
votes
4answers
384 views
Why do we need SWRL and RIF in an OWL2 world?
What are the limitations of OWL 2, i.e. in which cases do we require a rule language such as SWRL? If SWRL was developed to address the shortcomings of OWL 1 (e.g. no property chai …
3
votes
2answers
121 views
RIF libraries for Java?
Hi!
For some time now I have been experimenting with Semantic Web technologies such as RDF, RDF Schema and a little bit of OWL, and I feel ready to look closer at mechanisms for ru …
4
votes
5answers
337 views
Does the linked data web need OWL/RIF/SWRL etc?
A slight rephrasing of the question posed at ISWC (which was does the linked data web need ontologies - but the definition of ontology was kept sufficiently vague as to make the qu …