[1] [CITE[OWL 2 Web Ontology Language Structural Specification and Functional-Style Syntax]]
([TIME[2009-10-27 23:15:00 +09:00]] 版)
<http://www.w3.org/TR/2009/REC-owl2-syntax-20091027/#Appendix:_Internet_Media_Type.2C_File_Extension.2C_and_Macintosh_File_Type>