June 2017 » TopQuadrant, Inc

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Monthly Archives: June 2017

How to define constraints on rdf:Lists using SHACL

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” and “green” … Read More »

Posted in Ontologies, SHACL, The Semantic Ecosystems Journal | Comments Off

How to use TopBraid as a data validation server

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 (among … Read More »

Posted in Linked Data, SHACL, SHACL, The Semantic Ecosystems Journal, topbraid, TopBraid EDG, TopBraid EDG, TopBraid EVN, TopBraid EVN | Comments Off

An Overview of SHACL Features and Specifications

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 document, … Read More »

Posted in Data Governance, Linked Data, Ontologies, Ontologies, SHACL, SHACL, SPARQL, The Semantic Ecosystems Journal, topbraid, TopBraid EDG, TopBraid EDG, TopBraid EVN, TopBraid EVN | Comments Off
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