description for `abs_air_humidity` contains inaccurate symbol

[turbomam]

Actual mass of water vapor - mh20 - present in the air water vapor mixture

presumably the symbolic notation for mass of water vapor is mH2O, with a capitalized H and the letter O (not the digit 0)

And what does the word "Actual" add to the description? Are there cases in which we measure imaginary or theoretical mH2O? I trust the experts on this, but this is an example of the kind of description review that we should be doing.

MIXS:0000122

Resolution

• [ ] Check slot usage in NCBI -- how many say NA?
• [ ] Update description after confirming "actual" -- Actual mass of water vapor - mH2O - present in the air water vapor mixture

[lschriml]

Action Item: -- edit for definition for this term: abs_air_humidity -- review the definition, per comments above

[lschriml]

Question: How do we make these edits ?

[lschriml]

@turbomam -- please document the steps/documentation here.

[turbomam]

Here's the existing documentation that is most directly related to schema maintenance:

• https://github.com/GenomicsStandardsConsortium/mixs/blob/main/release/README.md

[only1chunts]

According to Gemini: Absolute humidity is the mass of water vapor divided by the volume of the air and water vapor mixture. Units: It's often expressed as grams of water vapor per cubic meter (g/m³).

[turbomam]

Those few souls who submitted abs_air_humidity with a numerical value and with a unit agree with @only1chunts and Gemini

Out of ~ 44 million Biosamples cached this week

unit	count
	12671
dimensionless	4934
gram per cubic metre	22
kilogram per cubic metre	4
percentage	3

In other words

• 12,671 Biosamples have an abs_air_humidity assertion that contains no number (ie the various approved and ad-hoc missing data indicators)
• 4,934 Biosamples have an abs_air_humidity assertion that contains a number but no unit that can be parsed out by quantulum3

[turbomam]

So I would vote for adding a preferred unit annotation at this point too.

It could be inclusive like "gram per cubic meter;kilogram per cubic meter;percentage" or just include the most common one "gram per cubic meter"

[turbomam]

@mslarae13 or I can edit the mixs.yaml file to include these updates, either in our free time, or in a meeting where other people can see the process