From 2012 to 2015 together with other Linked Data community members and experts from the social, behavioural, and economic sciences (SBE ), we developed diverse vocabularies to represent SBE metadata and rectangular data in RDF. The DDI-RDF Discovery Vocabulary (Disco) is designed to support the dissemination, management, and reuse of person-level data, i.e., data about individuals, households,...

The AutoMed project uses a hypergraph common data model the HDM to integrate heterogeneous data sources Previous work has shown how data models including the relational ER and XML mod els can be mapped on to HDM to facilitate schema integration RDF is a general purpose language for representing information on the World Wide Web It provides a data model for describing properties of re sources in...

The increasing interest in the RDF data model has turned the efficient processing of queries over RDF datasets to a challenging and crucial task. Indeed, the triple format of the RDF data model, along with the lack of structure that characterizes it, raise new challenges in data management both in terms of performance and scalability. In this paper, we consider improving the performance of RDF ...

Abstract RDF triplestores’ ability to store and query knowledge bases augmented with semantic annotations has attracted the attention of both research industry. A multitude systems offer varying data representation indexing schemes. However, as recently shown for designing structures, many design choices are biased by outdated considerations may not result in most efficient a given workload. To...

From a theoretical point of view, the Semantic Web is understood in terms of a stack with RDF being one of its layers. A Semantic Web application operates on the common data model expressed in RDF. Reality is a bit different, though. As legacy data has to be processed in order to realise the Semantic Web, a number of questions arise when one is after processing RDF graphs on the Semantic Web. T...