Standard ECMA-376

Office Open XML File Formats



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

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. An Office Open XML overview is available on the Ecma website.

The following files can be freely downloaded:

ECMA-376 4th edition is technically aligned with ISO/IEC 29500.

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