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This document describes a method for storing data in a PDF file that correspond to the processing steps of printed products. This method has three parts: 1) metadata identifying processing steps; 2) limitations on the interaction between PDF graphics objects that are part of a processing step and other PDF graphics objects; 3) limitations on PDF graphics objects in processing steps. This method is intended to be generic, i.e. not specific to packaging and labels. In addition, this document defines the following packaging- and label-specific groups of processing-steps data: — data corresponding to finishing steps, such as cutting, folding or glueing; — Braille; — information panels; — indications of physical dimensions; — indications of intended positions of graphical elements; — printed white, for example on transparent or metallic surfaces; — printed varnish.