The http://sig.ma service was created as a demonstration of live, on the fly Web of Data mashup. Provide a query and Sig.ma will demonstrate how the Web of Data is likely to contain surprising structured information about it (pages that embed RDF, RDFa, Microdata, Microformats)
By using the Sindice search engine Sig.ma allows a person to get a (live) view of what's on the "Web of Data" about a given topic. For more information see our blog post. For academic use please cite Sig.ma as in .
Sig.ma EE is a standalone, deployable, customisable version of Sig.ma. Sig.ma EE is deployed as a web application and will perform on the fly data integration from both local data source and remote services (including Sindice.com). Sig.ma EE currently supports the following data providers:
It is very easy to customise visually and to implement new custom data providers (e.g. for your relational or CMS data) by following documentation provided with Sig.ma EE.
Want to give it a quick try? Sig.ma EE now also powers the service on the http://sig.ma homepage so you can add a custom datasource (e.g. your publicly available SPARQL endpoint) directly from the "Options" menu you get after you search for something. It is very easy to implement new custom data source (e.g. for your relational or web CMS data) by implementing interfaces following the examples.
Sig.ma EE is open source and available for download. The standard license under which Sig.ma EE is distributed is the GNU Affero General Public License, version 3. Sig.ma EE is also available under a commercial licence. Please contact us to discuss further.
If you would like to share any feedback with our team, at this point please use the sindice-dev google group.
 Giovanni Tummarello, Richard Cyganiak, Michele Catasta, Szymon Danielczyk, Renaud Delbru, Stefan Decker "Sig.ma: Live views on the Web of Data", Journal of Web Semantics: Science, Services and Agents on the World Wide Web - Volume 8, Issue 4, November 2010, Pages 355-364
Sigma and Sindice are built at DERI , mainly within the OKKAM Project (ICT-215032) but also with the support of Science Foundation Ireland under Grant No. SFI/02/CE1/I131, the ROMULUS project (ICT-217031), the iMP project, the LOD2 Project (257943), the LATC Project (256975), the Cloud4Soa Project, and the SemLib Project.
Sigma uses the following services: