by Holger Knublauch | Jun 13, 2017 | Ontology Modeling, Best Practices, Blog
RDF lists are a rather weak spot of the semantic technology stack. Their design is basically a linked structure of intermediate list nodes using dedicated properties rdf:rest and rdf:first. So a simple list of string literals “red”, “yellow”...
by Holger Knublauch | Jun 13, 2017 | Best Practices, Blog
RDF data validation is the process of checking a (data) graph against constraints from a schema definition. In the Shapes Constraint Language (SHACL), constraints are themselves expressed in a RDF syntax, in so-called shapes graphs. SHACL-based validation engines can...
by Holger Knublauch | Jun 12, 2017 | Blog
After two and half years of collaboration and discussions, the W3C Data Shapes Working Group has produced a collection of specifications that define the features of the Shapes Constraint Language (SHACL): SHACL (Official W3C Standard Recommendation) is the main...
by Holger Knublauch | Apr 17, 2017 | Data Governance, Blog
(original posted on September 6, 2016) What is SHACL? The RDF Shapes Constraint Language (SHACL) is a new W3C standard for specifying rich data constraints as part of semantic data models. It can be used with RDFS/OWL ontologies or, alternatively, an entire model can...
by Holger Knublauch | Oct 27, 2015 | Uncategorized
Our first of a series of Deep Dives into TopBraid EVN webinars featured the recently released AutoClassifier module. We demonstrated how AutoClassifier uses machine learning technology to automatically tag content with terms from your controlled vocabularies. This...
