Calais (Reuters product)

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Calais is a service by Thomson Reuters that automatically extracts semantic information from web pages in a format that can be used on the semantic web.[1] Calais was launched in January 2008, and is free to use.[2][3]

The Calais Web Service reads unstructured text and returns Resource Description Framework formatted results identifying entities, facts and events within the text.[4] The service appears to be based on technology acquired when Reuters purchased ClearForest in 2007.[5]

Recent uses of the technology have included the automatic tagging of blog articles[6] and the organization of museum collections.[7]

Calais uses natural language processing technologies delivered via a web service interface.

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