I blogged before on how to test SKOS integrity constraints, constraints which couldn't be expressed with OWL2 as defined by W3C.
I'm aware of two sol...
Problem statement
We have been using in a project Sesame as rdf triple store and SPARQL endpoint.
The reasons we choose Sesame ...
Identifiers with qualifiers in round brackets
DBPedia is using in its identifiers qualifiers within round brackets to be able to distinguish bet...
In previous posts we explained that we are looking for a tool that would offer functionalities similar to the now 'out-of-business' Siderean Seamar...
In this case I need to construct new unique identifiers for instances that do already exist (hence having already a unique id) based on some given ...
Negation
Sometimes you need to check whether certain
triples don't exist in the RDF graph.
Checking the absence of tr...
In my never ending search for the optimal pipeline infrastructure I came across Semantic Web Pipelines, an engine and graphical environment for gen...
SPARQL is the standard query language for the
Semantic Web.
SPARQL provides the SELECT keyword to
extract information out of an RDF/OWL repository...
Living in the XML and RDF world