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  1. OMG Issue

SYSML21 — SysML missing `disjoint` keyword

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  • Key: SYSML21-682
  • Status: open  
  • Source: Budapest University of Technology and Economics ( Dr. Vince Molnar)
  • Summary:

    There is no way to express in SysML concrete syntax that two types are disjoint. Even though disjointness is in the abstract syntax (inherited from KerML), the concrete syntax does not carry it over from KerML. Specifying disjointness is important for modeling patterns and also for capturing ontological or design decisions.
  • Reported: SysML 2.0b2 — Fri, 25 Sep 2026 17:56 GMT
  • Updated: Fri, 25 Sep 2026 17:56 GMT