Opened 4 years ago

Last modified 8 months ago

#1811 assigned question

Question: base-unit vs. unit elements

Reported by: C Evans Owned by: cjmcdonald
Priority: minor Milestone:
Component: unit definitions Keywords: XML, element types


Looking at the UCUM XML definition file (ucum-essence <date>.xml), I was surprised to find that the 7 UCUM base units are not defined as elements of type "unit" with a class of "base", but as a separate element type "base-unit".

Is there a discussion anywhere of how this design decision was arrived at?

As base units are themselves usable units (i.e. they are not abstract), it would seem more useful to include them in the set of units, and differentiate them by class. E.g. an XPath expression to return, or count "all defined units", would currently need to include patterns for two separate element types instead of one.

Change History (2)

comment:1 Changed 9 months ago by Brenée Mitchell

Owner: set to cjmcdonald
Status: newassigned

comment:2 Changed 8 months ago by Brenée Mitchell

Note from Clem: Would have thourhg there is an explanation Others may know it beter

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