49 Adobe Illustrator 1.0 / 1.1 Image (Vector) The documents (files) created by Adobe Illustrator are PostScript language documents. A PostScript language document description that minimally conforms to the Document Structuring Conventions has two main parts: a prolog and a script. The prolog encapsulates information needed by other programs to interpret the file. The script describes the graphic elements on the page 165 Georgia Tech Research Institute / Georgia Tech Research Institute 23 Sep 2003 http://mercator.elte.hu/~saman/hu/okt/AI7FileFormat.pdf Adobe has classified Illustrator versions 1.0 and 1.1 as the same file format. 19 Jul 2013 application/postscript MIME com.adobe.illustrator.ai-​image Apple Uniform Type Identifier x-fmt/20 PUID ai File extension 880 Adobe Illustrator 1.x v1 The first line of the file declares with the Comment prefix %! that the file contains a PostScript program. It then specifies that the file conforms to version 2.0 of the Document Structuring Conventions and further that the file conforms to version 1.2 of the conventions for Encapsulated PostScript Files. The second line contains a %%Creator comment that identifies version 1.0 as the version of Adobe Illustrator that generated the PostScript document. 1 Absolute from BOF 0 0 252150532D41646F62652D322E3020455053462D312E320D252543726561746F723A41646F626520496C6C7573747261746F7228544D2920312E30 881 Adobe Illustrator 1.x v2 The first line of the file declares with the Comment prefix %! that the file contains a PostScript program. It then specifies that the file conforms to version 2.0 of the Document Structuring Conventions. It may or may not specify EPSF 1.2. The Creator may or may not be Adobe Illustrator, but the DocumentProcsets declared in the header will be Adobe Illustrator 1.0, 1.1 or 1.2 1 Absolute from BOF 0 0 252150532D41646F62652D322E30{10-2096}2525446F63756D656E7450726F63536574733A(2041|41)646F62655F496C6C7573747261746F725F312E(30|31|32) Has priority over 86 Encapsulated PostScript File Format Has priority over 331 Encapsulated PostScript File Format Has priority over 332 Encapsulated PostScript File Format Has priority over 771 PostScript Has priority over 773 PostScript