Opened 21 months ago

Last modified 6 months ago

#187 assigned enhancement


Reported by: Martinvl Owned by: gschadow
Priority: minor Milestone: Version 2.2
Component: unit definitions Keywords:


The Dalton (symbol Da) is not catalogued in the list. It is an alternative name for the atomic mass unit. In the 8th edition of the SI Brochure, it appeared to have equal status to the amu, but in the draft version of the 9th edition of the SI Brochure (Table 8) it appears to be preferred above the amu.

Change History (3)

comment:1 Changed 18 months ago by gschadow

  • Owner set to gschadow
  • Status changed from new to assigned

This seems to be a change of mind among SI committee. UCUM does not need to include multiple synonymous symbols, so we do not need to do anything about this. However, we could add some unit symbol for it specifically or at least cross reference it.

No decision yet. Open for discussion.

comment:2 Changed 18 months ago by gschadow

  • Component changed from help to unit definitions
  • Milestone set to Version 2.1

comment:3 Changed 6 months ago by gschadow

  • Milestone changed from Version 2.1 to Version 2.2

Ticket retargeted after milestone closed

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