http://www.web2py.com/semantic The idea of the semantic web, embodied by Linked Data, is that of labeling relations between data using the Web Ontology Language (OWL) and post the data online using an XML based protocol (RDF). Now you can do it in web2py by simply labeling fields and tables in the Database Abstraction Layer (DAL) with .rdf={...} and installing this plugin. The plugin exposes a web service that publishes your database as Linked Data (only tables labeled with rdf). This system works with new and with most legacy databases. It transparently supports SQLite, MySQL, PostgreSQL, MSSQL, Oracle, FireBird, Informix, DB2, Ingres, and the Google App Engine. If you are interested in this area, please let us know. We could use some feedback.