787 Acrobat PDF/X - Portable Document Format - Exchange 1:1999 PDF/X-1:1999 Page Description PDF/X was developed by the Committee for Graphics Arts Technologies Standards (CGATS) and Adobe. This 'exchange standard' format is based on Adobe's PDF specification and includes additional notes specifically for delivery of high quality colour advertisements. A subset of the PDF specification, and an application standard as well as a file format standard; it was considered a 'more reliable' PDF file. There are several versions of the standard, which address specific issues, PDF/X-1: 1999 was based on PDF 1.2, however there is no known implementation of this version. PDF/X-1 is the only PDF/X standard permitting encryption. Text 1 Digital Preservation Department / The National Archives 01 Feb 2007 22 Oct 2009 application/pdf MIME fmt/144 PUID pdf File extension 692 PDF/X-1:1999 BOF First 5 bytes: %PDF- Variable bytes: /GTS_PDFXVersion(CGATS.12/1-1999) 1 Absolute from BOF 0 255044462D 1 Variable 2F4754535F5044465856657273696F6E{0-1}2843474154532E31322F312D3139393929 Has priority over 613 Acrobat PDF 1.0 - Portable Document Format Has priority over 614 Acrobat PDF 1.1 - Portable Document Format Has priority over 615 Acrobat PDF 1.2 - Portable Document Format Has priority over 616 Acrobat PDF 1.3 - Portable Document Format Has priority over 617 Acrobat PDF 1.4 - Portable Document Format Has priority over 618 Acrobat PDF 1.5 - Portable Document Format Has priority over 637 Acrobat PDF 1.6 - Portable Document Format Has priority over 869 TrueType Font Has priority over 1016 Acrobat PDF 1.7 - Portable Document Format Is previous version of 788 Acrobat PDF/X - Portable Document Format - Exchange 1:2001 Is subtype of 615 Acrobat PDF 1.2 - Portable Document Format