CoreModelsGuides
OWL
Keep the ontology and the application schema from becoming two portraits of Person.
- Turtle In, JSON Schema Out: Your First OWL TransformQuickstart · There is a .ttl file somewhere in your repository. Someone modeled the domain properly once — classes, subclass axioms, cardinality restrictions, a SKOS scheme for the controlled list — and then everyone else carried on hand-writing JSON Schema and DDL, because nothing bridged the two.
- OWL Over HTTP: Export, Import, Map, ReplayAPI · Two questions decide whether a format is really supported: can the system read it, and can the system write it? For the owl format key in CoreModels the answer is yes to both, and this article is the proof — four routes, real request bodies, real responses, and the direction rules stated without hedging.
- Ontology Alignment You Can Delegate: `transform_schema` and OWL Over MCPMCP · A partner sends you their vocabulary as a Turtle file. You need your catalog expressed in their terms so the two sides can exchange data, and you need a record of which of your concepts had no counterpart on their side. That used to be an afternoon in an ontology editor plus a spreadsheet nobody trusts.
- Infer Once, Gate Always, Replay Forever: OWL in a Build PipelineAutomation · Commit an exported ontology, re-run the export tomorrow, and look at the diff. If it shows reordered prefixes and reshuffled blocks, the export is not a build artifact — it is a rumor, and no reviewer will read it twice. If it shows exactly the statements your model changed, you have something CI can gate on.
- What the OWL Coder Knows: The IR Map, the Extras, the LedgerDeep dive · Ask a schema converter what it does with owl:Restriction and you learn most of what you need to know about it. Many treat OWL as a serialization problem — emit classes and properties, drop the axioms — so "required" and "single-valued" evaporate at the border. CoreModels treats it as a semantics problem: required and cardinality ride as owl:Restriction subclass axioms, OWL's own carrier, in both directions. That decision propagates through everything below.
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