What's new! (December 29, 2019) SysML 2 A major overhaul of SysML (in progress). Requests for Proposal: Modeling Language See Section 6.2.1.2 for formalization requirements, submission based on logical behavior modeling. API and Services SysML An extension to UML for systems engineering, for requirements-based design of hardware, software, and human systems. In response to an RFP developed by OMG