[Semantic Web]The Most Important Languages for the Semantic Web

读书笔记 Lee 发表于 2006/3/3 22:32:33 are the following:   • XML provides a surface syntax for structured documents but imposes no semantic constraints on the meaning of these documents. • XML Schema is a language for restricting the structure of XML documents. • RDF is a data model for objects (“resources”) and relations between them; it provides a simple semantics for this data model; and these data models can be represented in an XML syntax. • RDF Schema is a vocabulary description language for describing properties and classes of RDF resources, with a semantics for generalization hierarchies of such properties and classes. • OWL is a richer vocabulary description language for describing properties and classes, such as relations between classes (e.g., disjointness), cardinality (e.g. “exactly one”), equality, richer typing of properties, characteristics of properties (e.g., symmetry), and enumerated classes.

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