Open data triplification: The case of the greek open public data

In this paper we present issues concerning the implementation of associated open data of public character. A prerequisite for the connection of open data is the previous semantic annotation of data stored in open data flies such as those found in form, .XLS, .CSV and JSON. For this reason, we deal with the first part of the procedure concerning the clean-up of the source file and production RDF triples thereafter. For its implementation we use the RDF extension of Google Refine and to visualize the results we use Protegé 4.3.