The Calais Collection is an integration of the Thomson Reuters' Calais web service into the Drupal platform. The Calais 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 web service is free for commercial and non-commercial use.

Note - Calais module requires registration to obtain an API Key. This key is then input when configuring the module after installation and connects to your account. The Calais Collection is also part of OpenPublish, the semantic Drupal platform for publishers.

The RDF module is REQUIRED for the Calais module to work.