http://blogs.msdn.com/dmahugh/archive/2009/07/09/open-xml-developers-where-to-get-answers.aspxI recently returned from a long business trip, and while working through my email backlog I’ve come across several questions from developers who are working with the Open XML formats.&#160; I’ve responded to each of them with some tips on how to besten-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/dmahugh/archive/2009/07/09/open-xml-developers-where-to-get-answers.aspx#9833545Wed, 15 Jul 2009 00:29:19 GMT91d46819-8472-40ad-a661-2c78acb4018c:9833545Mitch 74<p>Hi Doug,</p> <p>Just by curiosity, were the changes made to Open XML in IS 29500 backported to ECMA 376? As far as I know, there were like a thousand of them, and they were not all typo corrections... So?</p> <p>And, if these two are still different (I think there is work under way to make ECMA 376 and a relaxed IS 29500 compatible or something), which is supported in Office 2010, and which is default?</p> <p>Regards,</p> <p>Mitch</p>http://blogs.msdn.com/dmahugh/archive/2009/07/09/open-xml-developers-where-to-get-answers.aspx#9846748Thu, 23 Jul 2009 23:30:48 GMT91d46819-8472-40ad-a661-2c78acb4018c:9846748dmahugh<p>Hi Mitch, sorry for the delayed response -- I'm just now cleaning out my overflowing in-box ...</p> <p>Office 2010 supports IS29500. &nbsp;As for the changes between ECMA-376 and IS29500, the way that's working is that Ecma has published ECMA-376 2nd Edition, which is equivalent to IS29500:2008. &nbsp;So the original ECMA-376 is 1st Edition, then 2nd Edition is aligned with the first version of IS29500. &nbsp;After there is a revision to IS29500 (as part of the ongoing maintenance process), Ecma will most likely publish a 3rd Edition that aligns with it, although that decision can't actually be taken by the Ecma General Assembly until an IS29500 revision is published by ISO/IEC.</p>