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OBO Foundry

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In the OWL language, all elements of an ontology (including classes/terms, and the ontology itself) are uniquely identified by a URI. Within the OBO family of ontologies, we require the use of Permanent URLs (PURLs) with a standard base prefix.

OBO Foundry OBO Foundry Identifier Policy Background This document outlines the OBO policy for identifiers and PURLs for OBO ontologies. In the OWL language, all elements of an ontology (including classes/terms, and the ontology itself) are uniquely identified by a URI . Within the OBO family of ontologies, we require the use of Permanent URLs (PURLs) with a standard base prefix. For example: http://purl.obolibrary.org/obo/UBERON_0000955 UBERON class PURL for ‘brain’ http://purl.obolibrary.org/obo/obi.owl ontology PURL for OBI Note that legacy formats such as obo-format and many bioinformatics

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