I18N-ISSUE-352: normalization of custom property names [.prep-CSS-Variables-1]

I18N-ISSUE-352: normalization of custom property names [.prep-CSS-Variables-1]

http://www.w3.org/International/track/issues/352

Raised by: Addison Phillips
On product: .prep-CSS-Variables-1

Section 2 says in part:

<quote>
Unlike other CSS properties, custom property names are case-sensitive.

EXAMPLE. While both --foo and --FOO are valid, they are distinct properties - using var(--foo) will refer to the first one, while using var(--FOO) will refer to the second. 
</quote>

Case sensitivity is not the only variation that can apply to text. While citing the case sensitivity is useful, should mention be made of other variations, such as Unicode Normalization? I believe that the actual restriction is that the text must be identical.