Module talk:Val/units

Documentation

I thought I had understood the format of entries. Now I have questions:

1) In the Chemistry section, why are these entries "invalid definition" ?

 uM  [[Molarity|µM]]  SI
 uM    µM    Molarity  SI

2) For these entries in Electromagnetism:

 N.A-2   N⋅A<sup>−2</sup>   Permeability 
 YC      C       Coulomb                            SI

How is it that when the second field is markup, it is displayed,

{{val|1|ul=N.A-2}} → 1 N⋅A⁻²

but when the SI marker is used the first field is displayed, not the second field?

{{val|1|ul=YC}} → 1 YC — CpiralCpiral 01:22, 15 August 2015 (UTC)