[csswg-drafts] [css-inline] which baseline values are required?

dauwhe has just created a new issue for 
https://github.com/w3c/csswg-drafts:

== [css-inline] which baseline values are required? ==
We currently have the [following values for dominant 
baseline](https://drafts.csswg.org/css-inline/#dominant-baseline-property):
 `auto | text-bottom | alphabetic | ideographic | middle | central | 
mathematical | hanging | text-top`

Can any of these be dropped? Are there any missing baselines that we 
need?

Please view or discuss this issue at 
https://github.com/w3c/csswg-drafts/issues/859 using your GitHub 
account