productontology.org cannot provide a class definition fo the requested URI.
Reason: There is no Wikipedia article http://en.wikipedia.org/wiki/Retirement_home& for 'Retirement_home&'.
If you want to use this word (to be precise: this "lemma") as a class, you must first create a respective article in the English Wikipedia by clicking on the link given above.
Here is the direct link to create such a page in Wikipedia: http://en.wikipedia.org/w/index.php?title=Retirement_home&&action=edit.
productontology.org cannot provide a class definition for some names. This can have several reasons:
This page is part of http://www.productontology.org/, a huge, precise dictionary of product types for advertising your products or services with the GoodRelations standard.
Univ.-Prof. Dr. Martin Hepp
E-Business and Web Science Research Group
Chair of General Management and E-Business
Universität der Bundeswehr München
Werner-Heisenberg-Weg 39
D-85579 Neubiberg, Germany
Phone: +49 89 6004-4217
eMail: mhepp(at)computer.org (preferred mode of communication)
Web: http://www.heppnetz.de/
Web: http://www.unibw.de/ebusiness/
Thanks to Axel Polleres, Andreas Radinger, Alex Stolz, and Giovanni Tummarello for very valuable feedback, and to Katharina Siorpaes and Daniel Bachlechner, who contributed to the initial analysis of the stability of Wikipedia URIs back in 2007.
The work on The Product Types Ontology has been supported by the German Federal Ministry of Research (BMBF) by a grant under the KMU Innovativ program as part of the Intelligent Match project (FKZ 01IS10022B).
Hepp, Martin: GoodRelations: An Ontology for Describing Products and Services Offers on the Web, Proceedings of the 16th International Conference on Knowledge Engineering and Knowledge Management (EKAW2008), Acitrezza, Italy, September 29 - October 3, 2008, Springer LNCS, Vol 5268, pp. 332-347.
Hepp, Martin; Siorpaes, Katharina; Bachlechner, Daniel: Harvesting Wiki Consensus: Using Wikipedia Entries as Vocabulary for Knowledge Management, IEEE Internet Computing, Vol. 11, No. 5, pp. 54-65, Sept-Oct 2007.