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This article provides an overview of the first BioASQ challenge, a competition on large-scale biomedical semantic indexing and question answering (QA), which took place between March and September 2013. BioASQ assesses the ability of systems to semantically index very large numbers of biomedical scientific articles, and to return concise and(More)
Facilitating the seamless evolution of RDF knowledge bases on the Semantic Web presents still a major challenge. In this work we devise EvoPat – a pattern-based approach for the evolution and refactor-ing of knowledge bases. The approach is based on the definition of basic evolution patterns, which are represented declaratively and can capture simple(More)
This paperp resents aw eb platformt hat applies concepts from the domain of Social Software to requirementse ngineering.T he platform implements severalc ommunity-oriented features that supportc ollaboration andk nowledge sharinga nd aim to foster thee ngagement of larger groups of stakeholdersi nt he collection, discussion, development, and structuring of(More)
With the ever-growing amount of RDF data available across the Web, the discovery of links between datasets and deduplication of resources within knowledge bases have become tasks of crucial importance. Over the last years, several link discovery approaches have been developed to tackle the runtime and complexity problems that are intrinsic to link(More)
The migration to the Semantic Web requires from CMS that they integrate human-and machine-readable data to support their seamless integration into the Semantic Web. Yet, there is still a blatant need for frameworks that can be easily integrated into CMS and allow to transform their content into machine-readable knowledge with high accuracy. In this paper,(More)
In this paper we present RDFauthor, an approach for au-thoring information that adheres to the RDF data model. RDFauthor completely hides syntax as well as RDF and ontology data model difficulties from end users and allows to edit information on arbitrary RDFa-annotated web pages. RDFauthor extends RDFa with representations for provenance and update(More)
Recent developments in hardware have shown an increase in paral-lelism as opposed to clock rates. In order to fully exploit these new avenues of performance improvement, computationally expensive workloads have to be expressed in a way that allows for fine-grained parallelism. In this paper, we address the problem of describing RDFS entailment in such a(More)
Despite the success of the emerging Linked Data Web, offering content in a machine-processable way and -- at the same time -- as a traditional Web site is still not a trivial task. In this paper, we present the OntoWiki-CMS -- an extension to the collaborative knowledge engineering toolkit OntoWiki for managing semantically enriched Web content.(More)
As comparatively powerful mobile computing devices become more common, mobile web applications have started gaining in popularity. Such mobile web applications as Google Mail or Calendar are already in everyday use of millions of people. Some first examples of these applications use Semantic Web technologies and information in the form of RDF (e.g. TripIt).(More)