The GWG 1v4 specifications from the Ghent Workgroup have long been the de facto standard for exchange of PDF documents in graphic arts. Evolving from such a standard is always difficult, yet we feel it’s necessary to keep up with changes in technology. The GWG 2015 specifications were born as the result of that evolution.
The 2015 specifications aren’t the first round of improvements done; in 2012 we already released significantly different specifications. Those were used a lot in testing and in some countries were used as the basis for national standards. In most cases however, the specifications themselves and the technological and business landscape were not ready for widespread adoption.
While the 2012 specifications exist and will continue to exist, we don’t expect them to be widely implemented.