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
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