OpenCalais is an open source project that creates rich semantic data by using natural language processing and other analytical methods through a Web service interface. It is a simple explanation for a piece of powerful software. OpenCalais was originally part of ClearForest, but Thomson Reuters acquired the project in 2007. Instead of marketing OpenCalais as proprietary software, Reuters allowed it to remain open. OpenCalais has since become valued metadata open source software that is used on blogs to specialized museum collections.
There are many notables who use OpenCalais and a sample can be found on “The List Of OpenCalais Implementations Grows.”
OpenCalais is excited about the new additions to the list:
“Add 10 to the list of innovative sites and services that use OpenCalais to reduce costs, deliver compelling content experiences and mine the social web for insight. See our press release for more details on each. We are thrilled to recognize the following new sites and services that are changing the way we engage with news and the social Web. They join a growing number of others in media, publishing, blogging, and news aggregation who use OpenCalais.”
Among them are The New Republic, Al Jazeera’s English blogging news networks, Slate Magazine’s blogging network, and I*heart* Sea.” Not only do news Web sites use OpenCalais, but news aggregation apps do as well, including, Feedly. DocumentCloud, and OpenPublish. Expect the list to grow even longer and consider OpenCalais for your own metadata solution.