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 open source specification is publicly available for download, and includes an open source license for distribution and use.

SysML is a general purpose modeling language for systems engineering applications. It is a dialect of UML™, the industry standard for modeling software-intensive systems. 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.

You can download the most recent version of the SysML open source specification by clicking here. See for yourself why this new visual modeling 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.

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For more information about the SysML please read the SysML FAQ and subscribe to the SysML Forum mailing list.

News

October 31, 2008 - Dial 'M' for Marketecture: Microsoft Elaborates Upon Oslo 'M' Modeling Language at PDC 2008.
Microsoft elaborated upon its Oslo modeling strategy during its annual Professional Developers Conference (PDC) held in Los Angeles this week. It appears that the core technologies associated with the Oslo modeling strategy include a text-based Domain Specific Language (DSL) code-named 'M', a design "surface" named Quadrant, and a repository for semantic models that it is currently unnamed. (Why not 'R'?) Given Microsoft's announcement last month that is joining the OMG, it is less than clear how text-based 'M' will help the OMG with its motley mix of semantically inconsistent and non-interoperable visual modeling languages, which include UML, OMG SysML, and BPMN. Will 'M" make the OMG's alphabet soup of modeling languages taste better or worse? For a NY Times article about Oslo modeling languages click here. To check out Microsoft's Oslo Developer Center directly click here.

October 15, 2008 – OMG Board of Directors Votes to Adopt UML 2.2 and OMG SysML 1.1 Revisions.
The Object Management Group (OMG) Board of Directors met in Orlando, Florida during the week of 22-26 September 2008 to approve nine new and and revised specifications. Among the revised specifications they voted to adopt were UML 2.2 and OMG SysML 1.1. You can download convenience documents for the UML 2.2 and OMG SysML 1.1 revisions using links found on the Specification pages of the UML Forum and SysML Forum, respectively. For the full OMG press release click here.

September 10, 2008 - UML Beats DSLs to Model-Driven Development Punch?: Microsoft Joins OMG.
Microsoft today outlined its approach for incorporating modeling into mainstream computing and announced that it is joining the Object Management Group (OMG),  the standards body responsible for defining the UML and BPMN modeling languages. "We're building modeling in as a core part of the platform," said Bob Muglia, senior vice president, Server and Tools Business at Microsoft. Does this mean that Microsoft is abandoning its Domain Specific Language (DSL) modeling strategy in favor of a General Purpose Language (GPL) modeling standard, or is this just Muddle Driven Marketecture hype? For the text of Microsoft's press release click here. For a video of Bob Muglia discussing Microsoft's approach to modeling click here.

For more SysML news click here ...