In a similar vein by starting to include the tags and descriptors defined by semantic web standards into its search index, web users suddenly have better reasons to use them.

BBC: NEWS | Technology | Yahoo makes semantic search shift

Dr Decker said the advent of the semantic web promised to make a search much more productive.

BBC: NEWS | Technology | Yahoo makes semantic search shift

Google also currently has some other semantic-search elements, such as the ability to assess what the web collectively thinks are the most significant items associated with certain keywords.

WSJ: Google Gives Search a Refresh

Powerset, the search engine that Pell created in 2003 and plans to open to the public in 2008, is one of a new crop of "semantic search" start-ups that aim to introduce natural language to the process of finding information on the Web.

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