sameAs - interlinking the Web of Data

The Web of Data has many equivalent URIs. The sameAs service helps you to find co-references between different data sets, either by entering a known URI, or using Sindice to search first.

In addition to the web-form, simple URIs can be provided to do lookups:

The following formats are also supported:
rdf+xml, text/n3, application/json, text/plain
both through content negotiation and also as a specific URI.
For example:

This allows the results to be composed and utilised by the more complex services, as well as facilitating re-use.

Ruby lib to interface it :