Ontologies / Datasets


DBpedia is a community effort to extract structured information from Wikipedia and to make this information available on the Web. DBpedia allows you to ask sophisticated queries against Wikipedia and to link other datasets on the Web to Wikipedia data.

Impact: 300 posts about DBpedia in the Blogosphere (according to Technorati), ca. 100.000 visitors of the DBpedia website in 2007, on average 350 daily visitors. DBpedia became the most popular dataset used with Semantic Web applications and research prototypes.

Software tools


OntoWiki a semantic collaboration platform implementing the Web 2.0 idea of an architecture of participation for the collaborative development of Semantic Web knowledge bases. Onto Wiki is implemented as an alternative user-interface for Powl and included in the latest Powl distribution.

Impact: more than 8.000 downloads of the OntoWiki software (since 2004) / 773 in Sep 2007, on average 3.000 monthly visitors of, broad variety of industrial and academic users.


Triplify tackles the chicken-and-egg problem of the Semantic Web by providing a building block for the “semantification” of Web applications. Triplify provides small, light-weight plugins for database backed Web applications and exposes semantics as RDF, Linked Data and JSON.


DL-Learner is a tool for learning concepts in Description Logics (DLs) from user-provided examples. Equivalently, it can be used to learn classes in OWL ontologies from selected objects. The goal of DL-Learner is to support knowledge engineers in constructing knowledge and learning about the data they created.


xOperator combines advantages of social network websites with instant messaging. It tries to be a semantic agent for xmpp / jabber network which finds and shares content about resources (using RDF/SPARQL) for you and your jabber friends.

Online Services

Cofundos – is a platform for community innovation and funding of open-source software: many individual donations and contributions are pooled together in order to realize bright software ideas.

Impact: more than 10.000 visitors in Oct 2007, 62 Blog posts (according to Technorati), Cofundos news announcements in major news channels (e.g.,,, more than 300 registered users, more than 5k pledged donations in Oct 2007.

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Last Modification: 2008-05-06 14:18:52 by Soeren Auer