@Misc{viljanen-tuominen-hyvonen-onki-ontology-server-extending-legacy-systems-2007,
  OPTkey = 	 {},
  author = 	 {Kim Viljanen and Jouni Tuominen and Eero Hyvönen},
  title = 	 {ONKI Ontology Server---Extending Legacy Systems with Ontology Mash-up Services},
  OPThowpublished = {},
  month = 	 {November},
  year = 	 {2007},
  note =    {Draft paper},
  abstract =     {The Semantic Web is based on using shared ontologies for enabling semantically disambiguated data exchange between distributed systems on the web. This requires, from the ontology publisher's viewpoint, efficient means for publishing ontologies on the web to ensure the availability and acceptance of the ontologies. From the ontology user's viewpoint, support services are needed for utilizing ontologies easily and cost-effectively in the users' own systems that are typically legacy systems without ontology support. This paper presents the ONKI ontology server for addressing these vital needs. For the publisher, ONKI provides a server and a Simple Knowledge Organization (SKOS) compatible light-weight ontology browser with ready-made web interfaces for making ontologies available both for human and machine users. For external legacy and other applications, ONKI provides centralized ontology services for semantic disambiguation, concept finding, and concept fetching. A major contribution of ONKI is to provide these services as ready-to-use functionalities for creating ``mash-up'' applications very cost-efficiently. Two prototypes of the system---ONKI-SKOS for all kinds of ontologies and ONKI-Geo for geographical ontologies with a map mash-up interface---are operational on the web and are currently being successfully used in several pilot applications.},
  OPTannote = 	 {},
  OPTproject = {http://www.seco.tkk.fi/projects/finnonto http://www.seco.tkk.fi/services/onki}
}