Search Results for "cardinality"

The future of Web languages seems to be the Semantic Web, and OWL is one of its activities. Now a question arises: What does OWL provide that XML and XML Schema don't? The answer is outlined below. 1. XML provides a syntax for structured documents, but doesn't define semantic constraints on the meaning of the documents. 2. XML Schema is a language for restricting the structure of XML documents. 3. RDF is a data model for objects ("resources") and relations between them; it provides simple semantics for this data model, and these data models can be

RDF Schemas 1. Motivation and Scope The model described by this document uses RDF concepts to provide a basic schema for RDF. An RDF schema is a collection of information about classes of RDF nodes, including properties and relations. This paper supplements the RDF Model and Syntax [RDFMS] specification by providing a typing system: informally, it is a basic set of nodes and relations that can be used to express properties of classes of RDF nodes. It includes a facility to indicate that certain classes are subclasses of others, and provides a