28. The method of claim 25 , further comprising, computing a similarity measure between the offer object and the request object based on the comparison between the offer object metadata and the request object metadata or the comparison between the offer object meta-tag and the request object meta-tag.
25. The method of claim 2 , wherein the semantic object is created in a process of matching offers and requests, an offer represented by an offer object and a request represented by a request object, and wherein the offer object and the request object are semantic objects that include metadata defining particulars of the offer and the request.