Message
mml @rowalign attribute must contain values from the list 'top', 'bottom', 'center',
'baseline', 'axis'
Rule XPath:
This rule ASSERTS the following, raising an alert if FALSE:
every $value in tokenize(@rowalign) satisfies $value = ('top', 'bottom', 'center',
'baseline', 'axis')
Additional Information
The mml @rowalign attribute specifies vertial alignment of cells with respect to other
cells in the same row.
On elements mml:mtable, mml:mstyle, and mml:math this attribute can hold one or more
space-separated values.
On elements mml:mtd, mml:mtr, and mml:mlabeledtr this attribute can hold one value
(this is enforecd by the DTD).