OpenCalais

OpenCalais is a web service that creates rich semantic metadata for the content submitted by users.

Calais is a rapidly growing toolkit of capabilities that allow you to readily incorporate state-of-the-art semantic functionality within your blog, content management system, website or application. The OpenCalais web service automatically creates rich semantic metadata for the content you submit – in well under a second. Using natural language processing, machine learning and other methods, Calais analyzes your document and finds the entities within it. But, calais goes well beyond classic entity identification and returns the facts and events hidden within your text as well. The OpenCalais initiative supports the interoperability of content and advances Thomson Reuters mission to deliver intelligent information. It offers free metadata generation services, developer tools and an automatic connection to the Linked Data cloud. The free OpenCalais service and open API makes it easy to automate content operations, enhance content, increase audience engagement and extend distribution across the content ecosystem.