Does some know of an OWL ontology describing different products? I've tried to find it on http://linkeddata.org but to no avail (or maybe I am missing something)? Ideally, the ontology would be linked to FOAF
4 Answers
If you are asking for a description vocabulary, GoodRelations is a plausible option, as suggested by msalvadores.
If you are looking for an ontology/taxonomy of products, you may want to look at Google's product taxonomy. The Drupal community translated that taxonomy into XML and RDF, dated back in May 2009.

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The basics of using GoodRelations for exposing product model details is described here:
http://www.ebusiness-unibw.org/wiki/Modeling_Product_Models
Also, this illustration might be helpful:
http://wiki.goodrelations-vocabulary.org/GoodRelations_for_manufacturers

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Meanwhile there are efforts from the makers of Goodrelations for this specific problem [1] to turn Product Classification Systems into Web Ontologies. They also work with Googles Product taxonomy. They have developed a tool [2] in python which allows you to do the transformation automatically.

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