Name : Martin Bailey Email : martin.bailey&globalgraphics.com MIME media type name : Image MIME subtype name : Vendor Tree - vnd.globalgraphics.pgb Required parameters : None Optional parameters : None Encoding considerations : binary This media type may require encoding on transports not capable of handling binary. Security considerations : The structure of a vnd.globalgraphics.pgb file can store image data and attributes of that image data, and is intended to be processed by tools described in the section "Applications which use this media". It cannot include executable codes or macros. The defined fields are mainly of a descriptive nature and provide information that is required to correctly view and render the image by a recipient. As such, the fields currently defined in the TIFF specification do not in themselves create additional security risks, since the fields are not used to induce any particular behaviour by the recipient application. vnd.globalgraphics.pgb has an extensible structure, so that it is theoretically possible that fields could be defined in the future which could be used to induce particular actions on the part of the recipient, thus presenting additional security risks, but the decision as to what action that recipient should take will still be in the hands of the recipient. Interoperability considerations : This media type will be used in the applications listed below. The recipient tool may determine from the header of the file whether or not they can appropriately process any particular instance. Published specification : The specification is privately held and made available to Global Graphics’ technology partners under non-disclosure agreements only. Applications which use this media : vnd.globalgraphics.pgb is intended to be used for the storage, archiving and transmission of raster data created by a Global Graphics Harlequin RIP, either by a Harlequin RIP, or by other tools using file reading technology licensed from Global Graphics Additional information : 1. Magic number(s) : 2F 50 47 42 20 hex (“/PGB “) 2. File extension(s) : .PGB, .pgb 3. Macintosh file type code : None required 4. Object Identifiers: None registered Person to contact for further information : 1. Name : Martin Bailey 2. Email : martin.bailey&globalgraphics.com Intended usage : Limited Use For use in extended file transfers within prepress workflows only. Author/Change controller : Global Graphics Software, Ltd Barrington Hall Barrington Cambridge Cambs CB2 5RG UK TEL: +44 1223 873800 FAX: +44 1223 873873 (created 2002-12-12)