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Unified Modeling Language™ (UML®)

NOTE:  There are no XSD files associated with Version 2.0

The current version is found at

OMG Formal Versions of UML®

Version Release Date


2.4.1 August 2011
2.4 March 2011
2.3 May 2010
2.2 February 2009

November 2007


August 2007

Please note that version 2.1 was never released as a formal specification.


July 2005
combines v1.4 and action semantics
March 2003
1.4 September 2001
1.3 March 2000

"Adopted" Version of UML®

Version Release Date


2.5 December 2013


iSO Release Information

ISO Release Information UML Version Format URL

This version (2.4.1) has been formally published by ISO as the 2012 edition standard: ISO/IEC 19505-1 and 19505-2.

2.4.1 PDF


This version (1.4.2) has been formally published by ISO as the 2005 edition standard: ISO/IEC 19501

1.4.2 PDF

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