The attached document describes the PSI document process.
Revision 2014/2016 (current version): version 1.1.1 (correction of minor inconsistencies, definition of version numbers, resubmission deadline 12 months, pre-final after Steering Group review: 28th April, 2014, final after 14-days public review: 2nd May, 2016)
Revision 2010: version 1.1.0 (addition of minor and major changes, no version number at that time)
Original 2006: version 1.0.0 (no version number at that time)
Document templates can be found here.