Ecma376

The standard documents for ECMA376 which are the basis for ISO OOXML standardisation can be found on their site.

Zipped PDF ECMA376 Part 1 Fundamentals
Zipped PDF ECMA376 Part 2 - two annexes
Zipped PDF ECMA376 Part 3
Zipped PDF ECMA376 Part 4
Zipped PDF ECMA376 Part 5

Comments in the ISO national standard committees are largely filed against these specification documents. Resolutions to the comments at the BRM would be amendments to the specification.