Eldorina Andreea Alergus of the Alexandru Ioan Cuza University of Iași, the oldest higher education institution in Romania, offers this overview of OpenCalais and Linked Data.

OpenCalais developer Richard Hancock wrote up an informative blog article Understanding the OpenCalais RDF Response summarizing the RDF output.

Others should find his clear explanation, which includes an example article and output, helpful in understanding OpenCalais RDF output.

This sample code shows how to use Markup entities and Disambiguated entities and how to use the Linked Data to get additional info on entities (how to retrieve information from the Linked Data end point).

Basically, the code sends a document to OpenCalais with RDF output format, and then analyzes the Companies, Geographies, Products, marked-up Companies, and the relevant disambiguated company URIs in the Linked Data. It outputs an xml file containing simplified data gathered from OpenCalais and Linked Data.

The application sends a document to OpenCalais with RDF output format. It analyzes the entities and outputs an xml file containing simplified data gathered from OpenCalais and Linked Data.