Enriching the e-GIF Ontology for an Improved Application of Linking Data Technologies to Greek Open Government Data

We present the current state of an ongoing project which involves the application of linked data technologies on a portion of data found in the ERMIS Greek portal for Public Administration. A starting point for linked open data technologies is data organization i.e. vocabulary definition that covers all classes and properties via an RDF schema or an ontology. More specifically, the focus of this paper is the enrichment of the e-GIF ontology, modeling the concepts and relations that are used to organize the information appearing in the ERMIS Greek portal for Public Administration with equivalent information required for the purposes of license provision according to the Directive 123/2006/EC. The enrichment process also involves the examination of the information appearing in the sites of other European countries. As it is already known, ontology alignment is a prerequisite step for finding schema-level links between Linked Open Data (LOD) datasets. The aim here is to identify those sites that contain the most valuable information and to include their concepts and relations in our ontology. This type addition will be further used for the interconnection of information between different sites via linked data.