Shopping search and the semantic web

Faceted search is becoming very common in commerce search. We introduce a new type of facet: a predefined schema for a product which can be used for the drilldown process. The actual search process which ensues from using such a facet is what is commonly known as a keytree search. Keytree search is a search on a library of XML documents which need to be ranked so they satisfy both the keyword and the tree structure constraints. This is a position paper which proposes combining existing vector space models (for keyword match) with tree isomorphism codes (for structural match).