Quiz: Data Validation & Constraints with SHACL

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Question 1 of 3

1. Question

A property shape declares sh:path ex:email with sh:datatype xsd:string, and a focus node carries no ex:email triple at all. What is the validation outcome?

It fails, because declaring the property in the shape makes it part of the contract for the class.
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It fails, but only when the enclosing node shape also sets sh:closed true.
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It produces a warning-level result rather than a violation.
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It passes, because value constraints are evaluated only against value nodes that exist; making the property mandatory requires sh:minCount 1.
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Question 2 of 3

2. Question

A node shape sets sh:closed true and sh:targetClass ex:Person. The data contains instances of ex:Employee, a subclass of ex:Person that carries ex:employeeId. What happens?

The employees are flagged as violations, because sh:targetClass also selects instances of subclasses and ex:employeeId is not declared among the shape property paths.
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Nothing, because a closed shape automatically admits any property declared on subclasses of the target class.
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Nothing, because sh:closed constrains only the datatypes of the declared properties.
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Nothing, because rdf:type and other standard metadata predicates are exempt from closed shapes by default, so sh:ignoredProperties is never required.
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Question 3 of 3

3. Question

Which statement about SPARQL-based constraints in SHACL is correct?

The embedded SELECT query must return the nodes that satisfy the constraint, so an empty result set means the data is invalid.
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You must bind $this yourself in a VALUES clause before the constraint query can be executed.
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The embedded SELECT must return the violating data: an empty result set means validation passes, and $this is pre-bound by the processor to the current focus node.
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MINUS and SERVICE clauses are permitted inside the query as long as it also projects a ?message variable.
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Quiz: Data Validation & Constraints with SHACL

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