The Findable, Accessible, Interoperable and Reusable principles provide a set of guidelines and best practices for describing and accessing research data to be reused by others. We believe that ontologies, on their own, should also adapt these principles to be reused by others. With this validator we aim to provide the means for researchers to assess whether a vocabulary (OWL or SKOS) conforms or not to the best practices for publishing ontologies on the Web. Our validator is based on the metrics proposed by the following publications:

Our ISWC 2021 demo paper (best demo award) provides an overview of the FOOPS! service. Please cite our work as follows:

            	title        = {FOOPS!: An Ontology Pitfall Scanner for the FAIR Principles},
            	author       = {Garijo, Daniel and Corcho, Oscar and Poveda-Villal{\'o}n, Mar{\i}a},
            	year         = 2021,
            	booktitle    = {International Semantic Web Conference (ISWC) 2021: Posters, Demos, and Industry Tracks},
            	publisher    = {},
            	series       = {{CEUR} Workshop Proceedings},
            	volume       = 2980,
            	url          = {}

If you are interested in more information, check our slides with the rationale of FOOPS! and the teaser video we made for ISWC 2021

This work was led by several researchers of the Ontology Engineering Group at Universidad Politécnica de Madrid:

Do you have suggestions or bugs to report? Please open an issue in our public GitHub repository