WSML is extension of a significant part of RDFs.WSML language cannot do full treatment of blank nodes. Rule based WSML variants are provided an express rule of a language which can be used for manipulation of RDF data. WSML uses epistemology that will abstract from the underlying logical languages.
techie
12 May 2010
Semantic web needed a separate language due to its nature of applications. Interoperability is one of the primary goals of the Semantic Web and that rules play a key part of those goals, there has been significant recent interest in standardization.