### Tags: #URIs --- ### Excerpt [>[! Uniform Resource Identifier] >"is a unique sequence of characters that identifies an abstract or physical resource,[1](https://en.wikipedia.org/wiki/Uniform_Resource_Identifier#cite_note-FOOTNOTEBerners-Lee,_Tim;_Fielding,_Roy_T.;_Masinter,_Larry20051-1) such as resources on a webpage, mail address, phone number,[2](https://en.wikipedia.org/wiki/Uniform_Resource_Identifier#cite_note-FOOTNOTEBerners-Lee,_Tim;_Fielding,_Roy_T.;_Masinter,_Larry20057-2) books, real-world objects such as people and places, concepts.[3](https://en.wikipedia.org/wiki/Uniform_Resource_Identifier#cite_note-FOOTNOTEBerners-Lee,_Tim;_Fielding,_Roy_T.;_Masinter,_Larry20055-3) URIs are used to identify anything described using the [Resource Description Framework](https://en.wikipedia.org/wiki/Resource_Description_Framework "Resource Description Framework") (RDF), for example, concepts that are part of an [ontology](https://en.wikipedia.org/wiki/Ontology_\(information_science\) "Ontology (information science)") defined using the [Web Ontology Language](https://en.wikipedia.org/wiki/Web_Ontology_Language "Web Ontology Language") (OWL), and people who are described using the [Friend of a Friend vocabulary](https://en.wikipedia.org/wiki/FOAF_\(ontology\) "FOAF (ontology)") would each have an individual URI." >>[Wikipedia](https://en.wikipedia.org/wiki/Uniform_Resource_Identifier) accessed August 8th, 2025. --- ### Citation --- ### Related Links [[]]