2716 Adobe Illustrator CC Artwork 17-23 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. Beginning with version 9, the Adobe Illustrated ai file format included both a pdf copy of the illustration and a postscript copy. Beginning with Adobe Illustrator 13.0. the PDF that Illustrator embeds in the file so that other apps can read the file is PDF 1.5. The PDF 1.5 header is included in the file structure. 299 Brigham Young University / Brigham Young University 24 May 2023 24 May 2023 fmt/1862 PUID ai File extension ait File extension 2206 Adobe Illustrator CC Artwork 17-23 PDF header '%PDF-1.5<illustrator:Type>Document</illustrator:Type>%!PS-Adobe-3.0' followed by wildcard bytes, then '%AI5_FileFormat 13' 1 Absolute from BOF 0 0 255044462D312E35*3C696C6C7573747261746F723A547970653E446F63756D656E743C2F696C6C7573747261746F723A547970653E*252150532D41646F62652D332E30*254149355F46696C65466F726D6174203133 Has priority over 618 Acrobat PDF 1.5 - Portable Document Format Is previous version of 1353 Adobe Illustrator Is previous version of 2717 Adobe Illustrator CC 2020 Artwork