Ontology for OpenAPI REST services descriptionsOntology for OpenAPI REST services descriptions Δημοσίευση σε Συνέδριο Conference Publication 2021-12-232020enOpenAPI Specification (OAS) defines a description format for REST APIs. In order for a machine to understand the meaning of REST services, OpenAPI service descriptions must be unambiguous. In a previous work we analysed the reasons that cause ambiguities in OpenAPI and showed that, in order to eliminate ambiguities, OpenAPI properties must be semantically annotated and mapped to a semantic model. Leveraging latest results for hypermedia-based construction of Web APIs (i.e. Hydra), the present work forwards this approach and proposes a reference ontology for REST services along with a formal procedure for converting OpenAPI service descriptions to instances of this ontology.2020 IEEE 32nd International Conference on Tools with Artificial Intelligence (ICTAI), 9-11 Nov. 2020, Baltimore, MD, USAhttp://creativecommons.org/licenses/by/4.0/35-402020 IEEE 32nd International Conference on Tools with Artificial Intelligence Karavasileiou Aikaterini Καραβασιλειου Αικατερινη Mainas Nikolaos Μαϊνας Νικολαος Petrakis Evripidis Πετρακης Ευριπιδης Institute of Electrical and Electronics Engineers Web service Ontology OpenAPI REST Hydra