Abstract

Leveraging the latest research results on hypermedia-driven Web APIs and the newest update of the OpenAPI Specification, we propose a reference ontology for REST services along with a formal procedure for converting OpenAPI service descriptions to instances of this ontology. At the heart of the approach is a model for enhancing the meaning of Schema properties (i.e. re-usable JSON Schema properties that clarify the meaning of service components). Schema properties are semantically annotated (i.e. their meaning is mapped to a semantic model) and existing properties are combined to form composed or polymorphic expressions. The algorithm for mapping service descriptions to the OpenAPI ontology is implemented and is available as a Web Application.

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