Office Open XML is an ISO standardhttp://blogs.technet.com/curiousgeorge/archive/2008/04/03/office-open-xml-is-an-iso-standard.aspxAs James points out, it is now official that Office Open XML has received enough votes to be approved as an ISO standard James also points out that Brian Jones has a very well thought out post on the subject if you want to read more.en-USCommunityServer 2.1 SP1 (Build: 61025.2)