"In computer science and information science, an ontology is a formal representation of a set of concepts within a domain and the relationships between those concepts. It is used to reason about the properties of that domain, and may be used to define the domain." (http://en.wikipedia.org/wiki/Ontology_%28information_science%29)

Semantic web search engine.

  The author of this article has summed up five points of semantic use for businesses. Read the article.

Consider the following set of triples: subject predicate object countries:Germany rdf:type countries:Country countries:Switzerland rdf:type countries:Country countries:UnitedStates rdf:type countries:Country countries:UnitedStates rdfs:label "United States" countries:TheNetherlands rdfs:label "The Netherlands"   Select all triples SPARQL Queries are build of statements and triples. When you look at the following query you see a SELECT statement. SELECT ?subject ?predicate ?object WHERE {     ?subject ?predicate ?object } With this statement the result is a set of all existing triples. Within the [...]

W3Schools has very useful information for the beginner. If you’re not familiar with the concept of OWL, you should start with this website. Many examples. Visit websites

This document demonstrates the use of the OWL language to formalize a domain by defining classes and properties of those classes, define individuals and assert properties about them, and reason about these classes and individuals to the degree permitted by the formal semantics of the OWL language. The sections are organized to present an incremental definition of a set of classes, properties and individuals, beginning with the fundamentals and proceeding to more complex language components. [...]

SWOOP is a tool for creating, editing, and debugging OWL ontologies. It was produced by the MIND lab at University of Maryland, College Park, but is now an open source project with contributers from all over. Visit website

View a large collection of OWL files. In this Protege library you will find a huge set of ontologies in several subjects. When you start your own ontology, you should first look here.

Protégé is a free, open source ontology editor and knowledge-base framework. The Protégé platform supports two main ways of modeling ontologies via the Protégé-Frames and Protégé-OWL editors. Protégé ontologies can be exported into a variety of formats including RDF(S), OWL, and XML Schema. Visit website

From today on, this new website with all information about ontologies for professional life is online. Please participate in discussions and enter questions about your own topics. You are more then welcome to join this community, so please register as a user!