dimensionless

[carueda]

udunits2-derived.xml contains:

    <unit>
        <dimensionless/>
        <name><singular>radian</singular></name>
        <symbol>rad</symbol>
    </unit>

How should the <dimensionless/> part be translated?

[graybeal]

As a data point, there are other units that are dimensionless in the real world, but do not have the tag. This was raised to the UDUNITS list but did not cause any concern for them. (So it probably shouldn't for us either. I guess.)

[graybeal]

The fact that no unit string is specified is, I guess, an indication that the unit is dimensionless. So perhaps this tag is redundant? (Not sure what, if anything, cares about the existence of this tag.) I'm still thinking about this one, for now.