To date, the standard has not been implemented by its vendor or the competition. It is clear that the Microsoft product will switch to their "open" standard in a certain time; does this mean competition in the field of standards
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Proposed Disposition of DIS 29500 Comment DE-0146 (Modified: 2008-01-04) We note that a growing number of implementations of ECMA-376 are becoming available, including those released by Apple (Mac OS X Leopard, iWork 08, iPhone), Adobe (InDesign), Microsoft (Office 2007, Office 2003, Office XP, Office 2000, Office 2008 Mac OS X), Novell (Suse Open Office) , Google (Search / Preview), Mindjet (MindManager), Intergen, OpenXML/ODF Translator (Open Source project on Sourceforge), Dataviz (DocumentsToGo on Palm OS, MacLinkPlus on Mac OS X Leopard), NeoOffice, Altova (XMLSpy), MarkLogic (XML Content Server), Datawatch (Monarch Pro), QuickOffice (QuickOffice Premier 5.0 on Symbian), Altsoft (XML2PDF Server 2007) and those under development by Corel (wordPerfect), AbiWord, Gnome (GNumeric), Xandros, Linspire, Turbolinux and others. These implementations are now available on many platforms, including Linux, the Macintosh, Windows, and handheld devices (PalmOS, Symbian, Windows Mobile).
Proposal: Get a clear legally enforcable commitment from the vendor regarding full compliance with its standard and compliance with IDABC open standard minimum requirements.