SysML 2.1b1 RTF Avatar
  1. OMG Issue

SYSML21 — tonne defined as 0.001 kg instead of 1000 kg

Open Closed All
  • Key: SYSML21-405
  • Status: open  
  • Source: sensmetry.com ( Dr. Vytautas Astrauskas)
  • Summary:

    In [KerML model interchange project for the SysML Quantities and Units Domain Library](https://www.omg.org/spec/SysML/20250201/Quantities-and-Units-Domain-Library.kpar), file `SI.sysml`, line 92, `tonne` is defined with conversion factor 1.0e-3 while it should be 1000:

    ```sysml
    attribute tonne : MassUnit { :>> unitConversion: ConversionByConvention { :>> referenceUnit = kg; :>> conversionFactor = 1.0e-3; } }
    ```
  • Reported: SysML 2.0 — Thu, 30 Oct 2025 09:28 GMT
  • Updated: Mon, 3 Nov 2025 21:00 GMT