Publikation
SPARQλ: A functional perspective on Linked Data Services
Christian Vogelgesang; Torsten Spieldenner; René Schubotz
In: Semantic Technology. Joint International Semantic Technology Conference (JIST-2018), November 26-28, Awaji City, Hyogo, Japan, Springer Nature, 2018.
Zusammenfassung
With more and more applications providing semantic data
to improve interoperability, the amount of available RDF datasets is constantly
increasing. The SPARQL query language is a W3C recommendation
to provide query capabilities on such RDF datasets. Data integration
from different RDF sources is up to now mostly task of RDF consuming
clients. However, from a functional perspective, data integration boils AQ1
down to a function application that consumes input data as parameters,
and based on these, produces a new set of data as output. Following this
notion, we introduce SPARQλ, an extension to the SPARQL 1.1 query
language. SPARQλ enables dynamic injection of RDF datasets during
evaluation of the query, and by this lifts SPARQL to a tool to write
templates for RDF producing functions, an important step to reduce the
effort to write SPARQL queries that work on data from various sources.
SPARQλ is moreover suitable to directly translate to an RDF described
Web service interface, which allows to lift integration of data and reprovisioning
of integrated results from clients to cloud environments,
and by this solving the bottleneck of RDF data integration on client
side.