> @bjlittle What about depth?
> @bjlittle Do you want to mention cube.attributes['positive']

I'm relying here on just covering the basics, like where it says below "Several vertical coordinate forms are supported ... The commonest ones are: ...".
So I chose to omit various details, and I hope that is ok.
It means you can't use this guide "backwards" because other stuff appears that this doesn't mention ("season" coordinates anyone??), but I think (hope) that is ok too !