SysML 2.0b2 FTF Avatar
  1. OMG Issue

SYSML2 — Quantity and unit for ratio and fraction

Open Closed All
  • Key: SYSML2-55
  • Status: closed  
  • Source: Model Driven Solutions ( Mr. Ed Seidewitz)
  • Summary:

    Explicit concepts for ratio, RatioValue and RatioUnit are missing from ISQ and SI, although they are highly relevant and often used.

    Similarly fraction, FractionValue and FractionUnit would be useful.

    Add these concepts as specializations of DimensionOneValue and DimensionOneUnit.

    Also add units <'%'> percent, <ppm> 'parts per million', <pbm> 'parts per billion'. For parts per billion it is important to explicitly chose the US or UK billion (10^9 vs 10^12).
  • Reported: SysML 2.0a1 — Wed, 26 Apr 2023 23:17 GMT
  • Disposition: Deferred — SysML 2.0b2
  • Disposition Summary:

    Defer

    The FTF considers this issue to have merit, but, due to lack of time, is deferring it to a future FTF or RTF.
  • Updated: Tue, 1 Jul 2025 14:46 GMT