ISO/IEC 29500-4 Revised
ISO/IEC 29500-4:2012
Information technology - Document description and processing languages - Office Open XML File Formats - Part 4: Transitional Migration Features
ISO/IEC 29500-4:2012 defines features for backward-compatibility and that are useful for high-quality migration of existing binary documents to ISO/IEC 29500. These features are used only by documents of conformance class WML Transitional, SML Transitional, or PML Transitional.
CHFÂ 65.-
A more recent version of this publication exists:
ISO/IEC 29500-4:2016