Common Tag is an open tagging format developed to make content more connected, discoverable and engaging. Unlike free-text tags, Common Tags are references to unique, well-defined concepts, complete with metadata and their own URLs. With Common Tag, site owners can more easily create topic hubs, cross-promote their content, and enrich their pages with free data, images and widgets.

Describes how to use the ARQ portion of the Jena framework to crawl the RDF now produced by Freebase.

This service generates views of Freebase Topics following the principles of Linked Data. You can obtain an RDF representation of a Topic by sending a simple GET request to http://rdf.freebase.com/ns/thetopicid, where the "thetopicid" is a Freebase identifier with the slashes replaced by dots. For instance to see "/en/blade_runner" represented in RDF request http://rdf.freebase.com/ns/en.blade_runner