An Intrepid Guide to Ontologies Ontology is one of the more daunting terms for those exposed for the first time to the semantic Web. Not only is the word long and without many common antecedents, but it is also a term that has widely divergent use and understanding within the community. It can be argued that this not-so-little word is one of the barriers to mainstream understanding of the semantic Web. The root of the term is the Greek ontos, or being or the nature of things. Literally — and in classical philosophy — ontology was used in relation to the study of the nature of being or the world, the nature of existence. UMBEL Web Services (hosted by Structured Dynamics) UMBEL Web services are supported by the structWSF Web services framework. The latest version of the UMBEL ontology has been indexed by the structWSF instance, and gets exposed to the generic public through these services. This structWSF-UMBEL instance is made public for testing purposes only. If you want to develop commercial applications around it, you will have to install structWSF and import UMBEL into your own instance since the performances and the up-time of this demo instance is not guaranteed. All of the tools on this Web site are using one, or multiple, of these structWSF endpoints:
Ontology Tools - OSF Wiki This listing received its last major update on Aug 22, 2010 (though with minor additions since). All tools added at that time are marked with <New> (new only means newly discovered; some had yet to be discovered in prior listings). There are now a total of 185 tools in the listing, 31 of which are new, and 45 from the first release. <Newest> reflects updates — most from the developers themselves — since the original publication of this post.
ConverterToRdf - W3C Wiki A Converter to RDF is a tool which converts application data from an application-specific format into RDF for use with RDF tools and integration with other data. Converters may be part of a one-time migration effort, or part of a running system which provides a semantic web view of a given application. See also: RDFImportersAndAdapters Please add converters as you make them or hear of them.
ISO 25964 Thesaurus Schemas This is the official website for information about ISO 25964, hosted by NISO, the TC46/SC9 Secretariat Summary description of ISO 25964 Development background Maintenance responsibility Content of Part 1 (ISO 25964-1) XML Topic Maps (XTM) 1.0. Traducción al español Especificación TopicMaps.Org Traducción al español Última versión: Esta versión: Autores: Miembros del Grupo de Autores de TopicMaps.Org;
SKOS Simple Knowledge Organization System Primer Abstract SKOS—Simple Knowledge Organization System—provides a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, folksonomies, and other similar types of controlled vocabulary. As an application of the Resource Description Framework (RDF), SKOS allows concepts to be composed and published on the World Wide Web, linked with data on the Web and integrated into other concept schemes. Subj3ct - Home Ontology Library Service Visuwords? online graphical dictionary and thesaurus