The file extension JDF is used by the Adobe Acrobat document software for files in Job Definition Format. These are XML-based files that contain information that links files to multiple production systems.
For example, JDF files contain data about media and ink requirements or run length. They also contain references and information about the actual documents and how they should be processed and arranged.
Often JDF files (jdf template) adapted by print service providers are provided, which the customer can still change.