Open Calais is an initiative from Thomson Reuters that
help people in structuring unstructured data. Open Calais uses Natural
Language Processing(NLP) and machine learning algorithms to analyse
unstructured text to generate semantic data in RDF format.
It’s quite easy for webmasters to implement it. All you have to do is feed unstructured data into Open Calais using API’s and generate tags for people, places, companies, facts, and events in your content to increase its value, accessibility and interoperability.
Open Calais offers Free as well as Paid plans.
Type: Hosted/On Premise