What the specification defines
Specifies the ZIP-and-XML packaging used by every modern Microsoft Office document format.
- Identifier
- ECMA-376 / ISO/IEC 29500
- Published by
- Ecma International
- First published
- 2006
ECMA-376 (Office Open XML) scores
Deterministic scores calculated from the structured facts above. Identical facts always produce identical scores.
Overall score
83/100
Archiving score
100- it is a current, actively maintained format
- it is actively maintained and current
Confidence 37% · evidence coverage 56%
Longevity score
89- it is actively maintained and current
- it is a current, actively maintained format
- it occupies a niche corner of the ecosystem
Confidence 39% · evidence coverage 75%
Related to ECMA-376 (Office Open XML)
Data quality
Every claim on this page is classified as a verified fact, a derived fact or an assumption.
- Overall confidence
- 93%
- Verification status
- verified
- Last reviewed
- 2026-08-03
- Verified facts
- 2
2 classified claims backed by 2 sources.
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- ECMA-376 — Office Open XML File Formats — Ecma International
Sources and review status
Review status: verified · confidence 90%
Last reviewed 2026-08-03 (revision 1).
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