Quiz: Property Graphs and the RDF Bridge: Neo4j, Cypher and ISO GQL

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Question 1 of 3

1. Question

What is ISO/IEC 39075:2024?

The ISO standardisation of SPARQL 1.2, published alongside RDF 1.2 Concepts
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GQL, the first entirely new ISO database language standard in over 35 years, which takes Cypher's pattern syntax as its foundation and adds a formal graph data model, graph types and schema, catalogue and session concepts and a specified type system
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The ISO standard for top-level ontologies, of which BFO is part 2
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SQL/PGQ, the property graph extension added to the SQL standard in 2023
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Question 2 of 3

2. Question

Which is a genuine structural cost of the labelled property graph model as the lesson presents it?

Relationships cannot carry properties, so any edge metadata needs an intermediate node
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There is no standard query language, since Cypher remains proprietary to a single vendor
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Traversal is slower than in RDF, because property graphs have no equivalent of property paths
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Identifiers are engine-local integers or strings rather than global IRIs, so two graphs built by two teams do not merge by construction the way two RDF graphs do
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Question 3 of 3

3. Question

What discipline does the lesson prescribe so that projecting a governed RDF graph into a property graph stays lossless?

Make the property graph the system of record and export it to RDF periodically for archival
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Run SHACL validation against the property graph only, since that is the layer being served
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Keep the original IRI on every projected node as a property, and push every correction back through the RDF model rather than into the projection
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Link each property graph node to its RDF counterpart with owl:sameAs and resolve at query time
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Quiz: Property Graphs and the RDF Bridge: Neo4j, Cypher and ISO GQL

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