pdfToolbox 9.1 adds support for the Processing Steps standard, includes a new version of the Adobe PDF library and extends several main pdfToolbox features.
PDF Processing Steps is a specification originally developed by the Ghent Workgroup (GWG) to associate information about printing and finishing processes (such as cutting, embossing, varnish …) with a PDF document. This is done by grouping page objects in layers (technically: optional content groups), and adding metadata to those layers to identify them as processing steps. The GWG specification is currently going through a standardization process at the ISO organization to become an official international standard.
pdfToolbox 9.1 implements wide support for this specification: it is possible to view or add processing steps information, check for its availability or correctness during preflight and fix common problems with it.