by Holger Knublauch | Jun 13, 2017 | The Semantic Ecosystems Journal, SHACL, Ontologies
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 | The Semantic Ecosystems Journal, topbraid, TopBraid EVN, TopBraid EDG, SHACL, TopBraid EDG, Linked Data, TopBraid EVN, SHACL
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 | The Semantic Ecosystems Journal, topbraid, SPARQL, Data Governance, TopBraid EVN, TopBraid EDG, SHACL, TopBraid EDG, Linked Data, TopBraid EVN, SHACL, Ontologies, Ontologies
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 Post Bot | Jun 12, 2017 | News, Events
TopQuadrant was a sponsor and exhibitor at the Data Governance & Information Quality Conference June 12-16, 2017, in San...
by Irene Polikoff | Jun 3, 2017 | The Semantic Ecosystems Journal, Data Governance, metadata management, metadata management
During our recent webinar on metadata management, we ran several polls including one that asked attendees “What can’t you do with your metadata management solution?”. The chart below summarizes results: To analyze these results and discuss the root causes...
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