I am finding the use of inferred properties to be very valuable. Using tosh:values in SPARQL to retrieve inferred values works well.
If I had a choice, I would prefer the second option (see below in bold) which doesn't require tosh:values. Using tosh:values means the user must know the property they are querying is an inferred property and that is not obvious without looking at the property shape. I think understanding complex property shapes is a level of knowledge above a user that can write a SPARQL query. Tim Inferring Data with SHACL Property Value Rules (topquadrant.com) <https://archive.topquadrant.com/graphql/values.html#sparql> Use of Inferred Values using SPARQL TopBraid includes a magic property (aka property function) tosh:values that can be used to fetch inferred values, or to check whether a given focus node has certain inferred values for a given predicate. Here is an example query: SELECT * WHERE { ?person a schema:Person . (?person schema:age) tosh:values ?age . } Note that this magic property can only be used to derive the right-hand value from the left-hand values, not vice versa. So the caller needs to make sure that both variables on the left-hand side are bound when tosh:values is evaluated. This magic property makes property value rules available to any SPARQL-based technology in the TopBraid platform, including SWP, SPARQLMotion, SPIN and SHACL-SPARQL itself. tosh:values falls back to any declared sh:defaultValue if no other value exists for the focus node and predicate. We are currently evaluating whether this integration with SPARQL should also more directly work with every use of an inferred property in a SPARQL query. For example, the following would then also work: *SELECT * WHERE { ?person a schema:Person . ?person schema:age ?age . }* *We welcome feedback on whether TopBraid should support this syntax in SPARQL or whether tosh:values is sufficient.* -- You received this message because you are subscribed to the Google Groups "TopBraid Suite Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/topbraid-users/CAF0WbnJJsGDcLLpwa1g53P12AB0vYC9CGCSYj_mgCt6u_xS36g%40mail.gmail.com.
