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Written by OWL Code
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OWL is seen as a major technology for the future implementation of a Semantic Web. It is playing an important role in an increasing number and range of applications, and is the focus of research into tools, reasoning techniques, formal foundations and language extensions.  The Web Ontology Language (OWL) is a language for defining and instantiating Web ontologies. An OWL ontology may include descriptions of classes, along with their related properties and instances. OWL is designed for use by applications that need to process the content of information instead of just presenting information to humans. It facilitates greater machine interpretability of Web content than that supported by XML, RDF, and RDF Schema (RDF-S) by providing additional vocabulary along with a formal semantics. OWL is based on earlier languages OIL and DAML+OIL, and is now a W3C recommendation.
OWL was designed to provide a common way to process the semantic content of web information. It was developed to augment the facilities for expressing semantics (meaning) provided by XML, RDF, and RDF-S. Consequently, it may be considered an evolution of these web languages in terms of its ability to represent machine-interpretable semantic content on the web. Since OWL is based on XML, OWL information can be easily exchanged between different types of computers using different operating systems, and application languages. Because the language is intended to be read by computer applications, it is sometimes not considered to be human-readable, although this may be a tool issue. OWL is being used to create standards that provide a framework for asset management, enterprise integration, and data sharing on the Web.
An extended version of OWL, (sometimes called OWL 1.1, but with no official status) has been proposed which includes increased expressiveness, a simpler data model and serialization, and a collection of well-defined sub-languages each with known computational properties.
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