Unique identifier for the OWL Serialization in Functional Syntax.
'http://www.w3.org/ns/formats/OWL_Functional
' is the URI. OWL Functional Syntax is defined by the “OWL 2 Web Ontology Language, Structural Specification and Functional-Style Syntax” W3C Recommendation. It has a media type: ‘text/owl-functional’ and a preferred suffix: ‘.ofn’. (See the for further details on the Media Registration.)