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Chapter 9. Basic OWL

Chapter 9. Basic OWL

In previous chapters, we saw how RDFS-Plus as a modeling system provides considerable support for distributed information and federation of information. Simple constructs in RDFS-Plus can be combined in various ways to match properties, classes, and individuals. We saw its utility in application to social networking (FOAF) and knowledge organization (SKOS); although RDFS-Plus has provided considerable and valuable infrastructure for these projects, we also identified capabilities required by these systems that RDFS-Plus cannot provide. In this chapter, we go further into the modeling capabilities of OWL, beyond RDFS-Plus, which provides a systematic treatment of information description. OWL provides constructs for describing information structure that will satisfy many of the outstanding requirements of FOAF and SKOS, as well as a number of more general information integration issues.

We continue our presentation of OWL with a treatment of owl:Restriction. This single construct opens up the representational power of OWL by allowing us to describe classes in terms of other things we have already modeled. As we shall see, this opens up whole new vistas in modeling capabilities.


  

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