Adobe 22020737 Acrobat X Pro Manual - Page 481
Job Definition Format, About JDF files
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475 Chapter 18: Job Definition Format You can create custom product definitions and save them as Job Definition Format (JDF) files. About JDF files A Job Definition Format file (JDF file) is based on XML, a nonproprietary information carrier that can link and refer files to multiple production devices. Using JDF, content creators and print service providers can describe the intent of a printed piece, as well as each process step required to achieve that intent. A JDF job definition file is like a selfdirected electronic job ticket that holds not only the job content (InDesign files or PDFs, for example) but also instructions to interact with JDF-enabled production systems. Jobs are automatically routed through each workflow step-from PDF creation, through preflight and correction, to final print production. What does a JDF file include? JDF files include such data as media and ink requirements, production quantities, customer information, and product descriptions. The JDF file also includes references to files that contain pages and describes how those pages should be ordered to make the product. In addition, the JDF file may include certain information necessary for the creation of PDFs appropriate for the production process, including PDF conversion settings and preflight profiles. Depending on the job definition instructions and the results of specified processes, a JDF file may also include a validation stamp, indicating that the print job was built according to the settings and verified. Process validation The ability to embed PDF conversion and preflight settings in a JDF package, and to verify that steps and processes were completed successfully, ensures the integrity of the files before the job enters print production. For example, a print service provider or content originator can use JDF to control PDF creation and preflight inspection automatically. This is done by specifying the PDF conversion settings and preflight profile that a job must conform to before it can enter the workflow production system. If the process is completed successfully, a validation stamp is added to the JDF, and validation text appears on the computer screen. How are JDF job definitions generated? JDF job definitions can be generated directly from Acrobat or based on a JDF template supplied by the print provider. These templates typically include Adobe PDF conversion settings, preflight profiles, and sometimes other commonly used job specifications. Because JDF job definitions are based on XML, they can start as high-level definitions describing only a rough outline of a printed piece and be modified later to add more concrete details. Alternatively, they can be completely created in one session. C=54% M=23% Y=89% K=12% Editor: Jane Shilbey, Production Artist: Li Jenu. 80 lb. coated cardstock. Spot colors: PMS 343-C, PMS 110-C Service Bureau Negative emulsion up. C=54% M=23% Y=89% K=12% Editor: Jane Shilbey, Production Artist: Li Jenu. 80 lb. coated cardstock. Spot colors: PMS 343-C, PMS 110-C Service C=54% M=23% Y=89% K=12% Editor: Jane Shilbey, Production Artist: Li Jenu. 80 lb. coated cardstock. Spot colors: PMS 343-C, PMS 110-C Service Bureau Negative emulsion up. C=54% M=23% Y=89% K=12% Editor: Jane Shilbey, Production Artist: Li Jenu. 80 lb. coated cardstock. Spot colors: PMS 343-C, PMS 110-C Service A B C Basic JDF workflow A. PDF file B. New or edited JDF job definitions C. PDF associated with job definitions, ready to be submitted to a JDF device Last updated 10/11/2011
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