Quiz: Core Semantic Standards (RDF, RDFS, & Serializations)

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Question 1 of 3

1. Question

An ontology declares rdfs:domain :Book on the property :hasPageCount. A developer then asserts :John :hasPageCount 300, where :John is a person. What does an RDFS reasoner do?

It rejects the triple and raises a type error, exactly as a relational database would.
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It infers the additional triple :John rdf:type :Book, because rdfs:domain is an inference rule and not a validation constraint.
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It reports an inconsistency, because :John is already typed as a Person and Book is a different class.
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It ignores the domain declaration entirely unless the same constraint is repeated in a SHACL shape.
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Question 2 of 3

2. Question

A modeller wants :hasDriver to apply to either a :Person or an :AutonomousAI, so declares rdfs:domain :Person and rdfs:domain :AutonomousAI on the same property. What actually happens?

RDFS reads repeated domains as a union, so each subject is inferred to be either a Person or an AutonomousAI.
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RDFS rejects the second domain declaration and silently keeps only the first one.
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RDFS reads multiple domains as an intersection, so every subject of :hasDriver is inferred to be both a Person and an AutonomousAI; expressing a union requires owl:unionOf or a shared superclass.
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Nothing is inferred, because domains are only evaluated at validation time by a shapes engine.
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Question 3 of 3

3. Question

Which statement about the RDF data model and its serializations is accurate?

RDF is an XML dialect, so every RDF document has to be parsed as XML before the graph can be built.
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RDF is an abstract graph model, and N-Triples writes exactly one complete triple per line with fully expanded IRIs and no prefixes, which is what makes it suitable for streaming and bulk loading.
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Turtle and JSON-LD encode different data models, so information is lost when a Turtle graph is converted to JSON-LD.
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Blank node identifiers such as _:b1 are globally unique, so two documents that both use _:b1 can be merged with no risk of conflating entities.
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Quiz: Core Semantic Standards (RDF, RDFS, & Serializations)

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