PUBLIC MARKS with tags data & graph

we wanted SVG because of its tight integration with the DOM. That’s why we decided to use d3, an svg graphing library from the creator of Polymaps, Mike Bostock.

The growing suite of SPARQL query services offer consumers an opportunity to merge data distributed across the web. A small number of extensions to SPARQL 1.1 enable expression of the merging queries. In particular, a SERVICE allows one to direct a portion of a query to a particular SPARQL query service, just as a GRAPH directs queries to particular named graphs. A BINDINGS keyword adds a compact syntax for tranfering results which constrain a query. The combination of these extensions allows one to compose a query which delegates parts of the query to a series of services. This specification defines the syntax and semantics of these extensions.