We present an introduction and a review of Shapes Constraint Language (shacl), the W3C
recommendation language for validating rdf data. A shacl document describes a set of …

Knowledge graphs (KG) have become an important data organization paradigm. The
available textual query languages for information retrieval from KGs, as SPARQL for RDF …

We describe and demonstrate a prototype of a UML-style visual query environment over
DBPedia that allows query seeding with any class or property present in the data endpoint …

Darbā izstrādātas oriģinālas metodes, kas ļauj vizuālus uz paplašinātām UML veida grafu
diagrammām balstītus rīkus izmantot praktisku ontoloģiju un semantisko datu vaicājumu …

We demonstrate a method for visual creation of schema-backed federated queries that
features schema summary visualizations and context-aware auto-completion of queries …

We describe a method for computing and visualizing data schemas for existing Linked data
endpoints, combined with creation of visual query environments over these endpoints. We …