dbaron, you asked in IRC awhile back if alphabetic | ideographic | central were stable enough to implement

dbaron, they're taken from SVG w3.org/TR/SVG11/text.html#BaselineAlignmentProperties

dbaron, so yeah, I can't imagine we could change them :)

dbaron, the only thing that's really new is that we defined vertical-align as a shorthand of alignment-baseline

dbaron, and allowed it to take alignment-baseline keywords