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Extractiv has quietly launched a service that crawls the Web for text on a specific topic, then transforms it into "structured semantic data." It's a direct competitor to Thomson Reuters' Calais product, which has been doing this for a couple of years now. This type of service is potentially valuable to media companies, search services and monitoring applications - because it turns messy, unorganized HTML content into data that is organized into categories and given other semantic 'meaning.'

I sat down with Extractiv CEO Shion Deysarkar at the recent Semantic Technology conference in San Francisco, to find out how Extractiv intends to compete with the more well-known and big media backed Calais.

Enterprise giant Oracle released its Database 11g Release 2 today, and it now supports OpenCalais, the Semantic Web service from Thomson Reuters. Native support for OpenCalais means users can now extract rich semantic metadata about people, places, companies, and events. Oracle directly calls the OpenCalais API through your normal database administration, though users will still have to grab an API key from Reuters.

OpenCalais began as the Clear Forest service and was acquired by Reuters back in 2007. By pairing with a leading enterprise-class database like Oracle, OpenCalais will prove that it can handle increasingly large document transactions, providing better search indexing and other semantic know-how to businesses as well as the consumer Web.

If you were a little blue bird, with a good pile of money and a whole lot of hype, what would you buy to spice up your nest? There are so many little services being built on top of Twitter that we wouldn't be surprised to see some more of them acquired by the company soon. That would mean more features for everyday users and more usefulness for features loved by loyal early adopters.

Twitter has acquired two other companies so far, that we know of. Search engine and sentiment analysis service Summize became Twitter's own search engine and Values of N sold its assets so engineer Rael Dornfest could be brought into the company. Here are ten other startups we think that Twitter should consider acquiring next. Which kind of company would you most like to see become part of Twitter itself? We've got a poll below.

Tom Tague from Thomson Reuters' OpenCalais team did a keynote speech today at SemTech in San Jose. His presentation was a wonderful wrapup of current semantic technology trends, and what we can expect over the next few years.

To open, he said that where we are now in the evolution of the Web is content rich, but information poor - plus "experientially deficient". He suggested that 'web 3.0' is about cleaning up the mess of web 2.0 and improving interfaces. In terms of semantic technology, he explained that over the past 5 years it has evolved from invention of standards to a period of commercial innovation on top of those inventions. While standards are still being worked on, now "we are at an inflection point where innovation is exploding."

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