You can't index meaning...

» Hakia, a meaning-based search engine: "You can’t index meaning “You can’t index meaning,” Riza explains. ”You can only index words, addresses, and URLs.” “We have invented a new system called Qdexing, which is specifically designed for meaning representation. Qdex means query detection and extraction. This entails analyzing the entire content of a webpage, then extracting all possible queries that can be asked to this content, at various lengths and forms. These queries become gateways to the originating documents, paragraphs and sentences during the retrieval mode. Note that this is done off-line before any actual query is received from a user.”"