Association for Computing Machinery
Most semantic web applications rely on RDF data as well as on the W3C standard SPARQL for querying this data. Linked data technologies are now being employed by a large number of applications. While experts can query the backend of these applications using the standard query language SPARQL, most lay users lack the expertise necessary to proficiently interact with these applications. Consequently, non-expert users usually have to rely on forms, query builders, question answering or keyword search tools to access RDF data.