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Calais is a service created by Thomson Reuters that automatically extracts semantic information from web pages in a format that can be used on the semantic web. Calais was launched in January 2008, and is free to use. The technology is now available via the website of Refinitiv, a provider of financial market data and infrastructure founded in 2018, that is a subsidiary of London Stock Exchange Group.

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

The technology has also been used to automatically tag blog articles, and organize museum collections.

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

References

1. "Calais Overview". Archived from the original on 2008-10-24. Retrieved 2008-10-24.
2. "Reuters Wants The World To Be Tagged". 6 February 2008. Archived from the original on 2008-04-11. Retrieved 2008-04-12.
3. Start making sense
4. "Intelligent Tagging". Refinitiv.
5. "Calais API guide". Archived from the original on 2008-10-23. Retrieved 2008-10-24.
6. "ClearForest". Archived from the original on 2013-01-24. Retrieved 2012-11-27.
7. "WP Calais Auto Tagger". Archived from the original on 2008-04-13. Retrieved 2008-04-12.
8. OpenCalais meets our museum collection /auto-tagging and semantic parsing of collection data

External links

• Official website
• Curry, E.; Freitas, A.; O'Riáin, S. (2010). "The Role of Community-Driven Data Curation for Enterprises" (PDF). In Wood, D. (ed.). Linking Enterprise Data. Boston, MA: Springer US. pp. 25–47. Bibcode:2010led..book.....W. doi:10.1007/978-1-4419-7665-9. hdl:10983/14597. ISBN 978-1441976642. Case Study of Open Calais {{cite book}}: |work= ignored (help)

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Tax & accounting	ONESOURCE State Apportionment
Predecessors	Reuters Group The Thomson Corporation International Thomson Organization
Other	3 Times Square Tom Glocer David Thomson ContractExpress The Woodbridge Company
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