The current stack of modeling languages for the web of data provide excellent mechanisms for capturing the static structure of data. SKOS can be used to describe concept hierarchies and vocabularies. RDF Schema and OWL can be used to define classes, properties and relationships between these conceptual entities. There is, however, a key set of application requirements these languages have not dealt with. Namely, the way to describe general computational behavior of objects.
These requirements are now addressed by an emerging standard that uses SPARQL to express rules for the Semantic Web. It is called SPARQL Inferencing Notation or SPIN. Because of its heavy use of SPARQL it is also known as SPARQL Rules. SPIN has recently been accepted by W3C as a member submission from TopQuadrant, OpenLink and RPI.
SPIN combines concepts from object oriented languages, query languages, and rule-based systems to describe object behavior on the web of data. Read more