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The foaf: Document case is interesting, shows that people might want to specify both the value’s class (foaf: Document) and node type (URI only).SPARQL includes the built-ins is IRI, is Blank, is Literal for those checks.This is an example of very complex constraints that require many features that are present in SPARQL to represent model-specific scenarios, including the comparison of incoming values against a controlled fact base, transformations from literal values to URIs, string operations, date comparisons etc.Details: EPIM Reporting Hub SPIN was used to represent and evaluate those constraints.Constraints can be used to verify that particular sets of data have such names for each person.Before an RDF graph was fed into the tool the constraints would be run over the graph.
The same story can be repeated for other tools that need particular information specified for the tool to work correctly.; Rather than rejecting or having yes/no, and discouraging users and rejecting a lot of data, have a number of responses that inform users of ways they could improve their data, while still accepting all but the truly unusable data. In Top Braid EVN (a web-based data entry tool), we have instance edit forms with an OK button.The envisioned calling setup would be something like This is probably the simplest user story, both in terms of setup and requirements.It illustrates the basic idea of checking to see whether for some RDF graph all nodes that belong to some type have the right kind of information specified for them.If shapes are not explicitly bound to owl/rdfs it is easier to decouple them.
Created by: Holger Knublauch Status: Suggested It is often necessary or desirable to check whether certain property values (or more general: RDF nodes) are of a specific node type (IRI, Blank Node or Literal and all combinations thereof).
Only if the constraints were not violated would the tool actually be run.