XREF (Background) Files 9 characters maximum (not including filetype extension) Standard: XPPA-DTTLL X PP A(-) D TT LL X: Identified the file as a Model file to be XREFed to other files. PP-: Project identifier (2 characters) (Optional) A: Phase identifier (Optional) (1 character or “-“ (hyphen)) D: Discipline (1 character) TT: File type (2 […]
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