BS-ISO/IEC-15909-2 Complete Document History
Systems and software engineering. High-level Petri nets

Complete Current Edition:
   2011 EDITION - High-level Petri nets. Transfer format - April 30, 2011
   2011 EDITION CORRIGENDUM 1 - CORRIGENDUM 1 FOR 2011 EDITION - July 31, 2014

Obsolete Revision Information:
   2009 EDITION - High-level Petri nets. Transfer format - Jan. 31, 2010