W3C

Unique URI-s for Semantic Web Entailment Regimes

W3C has published a set of URI-s to uniquely identify Semantic Web entailment regimes. These URI-s are needed for the upcoming SPARQL and RIF specifications, but their usage can be more general and not bound to specific technologies.

The URI-s for the various entailment regimes are:

Each of these URI-s can return, depending on content negotiations, XHTML+RDFa, RDF/XML, or Turtle content; the URI-s above with html, rdf, or ttl suffixes, respectively, can also be used to get to those versions directly.