About GVS

HP have set up this site to enable anyone who wishes to assist with our research into provenance and versioning of Semantic Web data to contribute such public data for

other users to explore as they see fit
exercising our implementation on wild data

While we are grateful for all contributions, we cannot make any warranties whatsoever regarding any aspect of our storage of your data in this way. Thus, before placing your data on this site, please make sure that you are aware of, and agree to, the following:

We cannot and do not promise to store your data for any period of time; it may, therefore, be removed, deleted or otherwise destroyed at any moment and for any reason, entirely at our discretion.
We do not restrict access to your data. Practically speaking, therefore, your data may be accessed and copied by anyone without restriction and without regard to any copyright you or anyone else may hold in it, or the secrecy of any of the content it records. In hosting this store we are not seeking to authorise illegal copying or dissemination of data. Accordingly, please do not put your data in the store unless you are happy for it to be copied and otherwise disseminated without fetter.

Graph Versioning System

What is GVS?

GVS allows persistent storage of RDF graphs, keeping track of provenance (which source supplied the statements) and history (which statements were added to/removed from the graph and when). Retrievals can specify unions over multiple sources and points in time.

An instance of GVS is usable directly through it's Java API, remotely through a RESTfull HTTP interface, or using an AJAX Web-Application.

GVS is experimental software intended for research purposes as part of the Jena family.

How does it work?

Basing on the concept of RDF Molecules GVS splits every graph into components. A metamodel contains the information about which source is asserting which component during which periods.

Where's the source?

You can check out the module 'gvs' from the CVS repository at :pserver:anonymous@jena.cvs.sourceforge.net:/cvsroot/jena. More information on how to access the CVS repository can be found here.

What is this Web-Site?

This site hosts a public GVS-Store. You can open an account and become a source. Accounts are weakly password-protected.

Forgot/modify password?

If you forgot your password or want to change it, reopen the account: if your username and email match the existing account, the password will be reset after you click on the confirmation link sent by email.