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