Standard ECMA-376

• Office Open XML File Formats

ECMA-376

• This Standard defines Office Open XML's vocabularies and document representation and packaging.
• It also specifies requirements for consumers and producers of Office Open XML.

Version

• 1st edition (December 2006)
• 2nd edition (December 2008)
• 3rd edition (June 2011)
• 4th edition (December 2012)
• 5th edition (Part 3, December 2015; and Parts 1 & 4, December 2016)

Link

• https://www.ecma-international.org/publications/standards/Ecma-376.htm