UML & SysML modelling languages

Expertise and blog articles on UML, SysML, and Enterprise Architect modelling tool

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 object management group sysml

SysML 1.5 specifications have been officially published by the OMG.

The specifications are available to download from According to the Object Management Group, the primary change from SysML v1.4 is the introduction of an Abstract Requirement that can be extended to support other kinds of requirements such as  property-based requirements.

It is also important to know that SysML has been published by the International Organization for Standardization (ISO) as a full International Standard (IS) under the title "ISO/IEC 19514:2017, Information technology -- Object management group systems modeling language (OMG SysML®)".

sysml iso IEC 19514:2017

Tuesday, 24 November 2015 00:00

SysML 1.4 available

The OMG has published the following announcement on the release of SysML 1.4.

September, 2015. The OMG SysML Version 1.4 specification (OMG document formal/2015-06-03) has been formally released and can be downloaded from the OMG SysML page at This specification was adopted in, March 2014, and supercedes SysML Version 1.3. Some of the vendors have implemented SysML v1.4 features in their tools.

Some of the more significant changes in SysML 1.4 include:

  • enhanced the view and viewpoint method that supports view generation
  • added a lightweight grouping mechanism called element group
  • provided mechanisms to unambiguously refer to a deeply nested element within a part hierarchy
  • substantial additions to non-normative quantity and unit libraries, and refined the QUDV semantics
  • added notations for inherited features, behavior compartments, and port features
  • included SysML diagram interchange capability
  • updated language conformance statements for abstract syntax, concrete syntax, and model interchange


Monday, 25 February 2013 22:48

SysML 1.3 released

The OMG has published this month the official specifications of the expected new version 1.3 of SysML, two years after releasing SysML 1.2.

SysML 1.3 includes a new definition of ports via the Full Ports and Proxy Ports, both allowing to combine operations to call, and items to flow in and out the block. SysML 1.3 updates also include nested ports, nested flows, association blocks, and port compatibility.

Further details are available from my post entitled "SysML 1.3 beta preview".

Monday, 06 August 2012 10:35

UML is 15 years old !

UML LOGOOMG celebrates the 15 year anniversary of UML!

Developed in 1995, UML modelling language became a standard in 1997 through its official version 1.1.

UML is currently in its version 2.4.1, until the next version 2.5 is released.

Tuesday, 17 April 2012 14:15

SysML 1.3 bêta preview

sysml 1.3SysML, the OMG modelling language based on UML and tailored for systems engineering is currently available in its version 1.3 bêta. The final version should be released this June.

SysML 1.3 brings many changes to the ports definition ; this article provides an overview of the new concepts including full port, proxy port, and nested port.