How to assign units?

[dorahermes]

          Another question, I want to add an example of some quantity (e.g. weight/amplitude) being less than a certain value, but can't find how to add the units, how can I add kilogram to: `(Weight, (Less-than, (Weight/30)))`? thanks!

Originally posted by @dorahermes in #137 (comment)

[IanCa]

Let me know if this doesn't do what you want:

(Weight, (Less-than, (Weight/30 kg)))

This should also work with placeholders e.g.:
(Weight, (Less-than, (Weight/# kg)))

[dorahermes]

Thank you! That works and I can now use this successfully (Finding-amplitude, (Less-than, (Finding-amplitude/30 v)))

However, there seems to be an issue using Volt, and I get an error using this: (Finding-amplitude, (Less-than, (Finding-amplitude/30 Volt)))

Errors for HED string 1:
UNITS_INVALID: Invalid unit - "Finding-amplitude/30 Volt" valid units are "Volt,v"

[IanCa]

I'm going to need to touch base with Kay and get back to you, but the root of the problem is Volt shouldn't have been capitalized in the schema originally.

[IanCa]

hed-standard/hed-python#884

This should make Volt and volt both work. The v vs V change will presumably be in 8.3.0 or later.

[VisLab]

This has been fixed in 8.3.0 prerelease. NIST says that SI is V and volt. The cap changes have been made.
However, going forward, once the hedId assignment becomes permanent -- this sort of case change will require deprecation.