Welcome

The SysML.org web provides information and specifications related to the Systems Modeling Language (SysML) open source specification project, founded by the SysML Partners in 2003. The SysML specification is publicly available for download, and includes an open source license for distribution and use.

SysML customizes the UML™, the industry standard for modeling software-intensive systems, for systems engineering applications. It supports the specification, analysis, design, verification and validation of a broad range of systems and systems-of-systems. These systems may include hardware, software, information, processes, personnel, and facilities. The SysML Partners completed their SysML v. 1.0a open source specification draft and submitted it to the Object Management Group (OMG) in November 2005. A series of competing specification proposals was followed by a "SysML Merge Team" proposal submission to the OMG in April 2006, which was adopted by the OMG as OMG SysML™ in July 2006.

The most current version of the SysML open source specification is available for download by clicking here. See for yourself why this new domain specific language is smaller and better suited for systems engineering applications than the UML on which it is based. (SysML is currently specified as a UML 2.x Profile, or customization.)

You are encouraged to explore the following major areas of our web:

• FAQ - Answers to Frequently Asked Questions related to SysML.
• Specifications - Download the latest SysML specifications.
• SysML Partners - Information about the group of software vendors and industry leaders that created the SysML open source specification.
• Feedback - Feedback form to report problems and request clarifications to the SysML specification.
• Legal Notices - Legal notices related to the SysML open source license, copyrights, and trademarks.
• SysML Tools - Selected SysML modeling tools.
• SysML Training - Selected SysML training resources.
• SysML Forum Mailing List - Open mailing list for all topics related to SysML.
• Other Resources - Furnishes links to other visual modeling resources.

If you want to have your SysML modeling tool, training service, book, paper or blog included in our web, please submit it to the SysML Forum for review by clicking here. For more information about the SysML please read our Frequently Asked Questions page and subscribe to the SysML Forum mailing list.

News

June 3, 2008 - UML Renaissance or Apocalypse?: Bill Gates Reveals UML Strategy at TechEd 2008.
During his TechEd 2008 keynote presentation, Microsoft chairman Bill Gates revealed that the Oslo-wave release of Visual Studio Team Studio will support the Unified Modeling Language (UML). Gates said the keynote was his "last public speech as a full-time chairman of Microsoft," and he covered a wide range of topics related to future technology advances. Although the Microsoft founder acknowledged "that the modeling world is fairly disparate today," he stated that Microsoft will have additional support for UML in Visual Studio 10 for the specific modeling tools that are there." Will this mark a renaissance for UML modeling or is it just more Muddle Driven Marketecture by a software giant in decline? For the text of Gates' keynote click here.

May 19, 2008. – UPDM 1.0 Beta Fails to Pass Standards Gate; Major Tool Vendors Absent from New UPDM Group.
The UPDM Group today announced its formation and intent to develop an improved version of the Unified Profile for DoDAF and MODAF (UPDM), a modeling standard that supports both the US Department of Defense Architecture Framework (DoDAF) and the UK Ministry of Defence Architecture Framework (MODAF). The UPDM Group is independent of the Object Management Group, the standards organization which issued a UPDM RFP in 2005 and adopted UPDM 1.0 Beta in 2007, but whose UPDM Finalization Task Force failed to produce a final specification acceptable to OMG members and key government stakeholders by its March 2008 deadline.  Although the initial list of UPDM Group members includes defense contractors and vendors, several major UML modeling tool vendors (IBM, Telelogic, Sparx Systems) who contributed to UPDM 1.0 Beta are conspicuously absent. For the UPDM Group press release click here.

May 15, 2008. - Are Reports of UML's Demise Being Exaggerated?
In an article entitled "13 reasons for UML's descent into darkness" Daniel Pietraru claims that "UML [has] lost the programmers." The author suggests that UML is becoming irrelevant to programmers due to causes that include design-by-committee syndrome, vendor greed, and concept bloat. Is UML usage waning or waxing? Is the quest for Round-Trip Engineering suffering a major setback? For Pietraru's article on the "little tutorials" web site click here.

For more SysML news click here ...