The first public review of UBL 2.2, the successor to UBL 2.1 - ISO/IEC 19845:2015, begins February 1, 2017 and closes March 17, 2017:
https://www.oasis-open.org/news/announcements/ubl-v2-2-begins-45-day-pub...
https://www.oasis-open.org/news/announcements/ubl-v2-2-begins-45-day-pub...