The Dandelion Short Text Classification Curl Sample Code demonstrates how to use the API that classifies short documents into a set of user-defined classes. It's a customizable tool for text classification and defining models takes a couple of minutes.
As the national library of the United States, the Library of Congress has created vast amounts of metadata to describe books and other documents in its collection. Among this metadata is the Library of Congress Subject Headings (LCSH), a "controlled vocabulary" for classifying documents by subject.
Reuters Labs has announced the release of their new Spotlight API. Spotlight is a non-commercial platform designed to "allow users to innovate and develop their ideas by harnessing the content Reuters publishes."
Expert System, a leading semantic technology company and developer of Cogito semantic technology, has announced the release of the Cogito Intelligence API which allows semantic processing and analysis functionality to be integrated with government, intelligence, law enforcement and other types of security software systems and applications.