Message
mml @groupalign attribute must contain values from the list 'left', 'center', 'right',
'decimalpoint'
Rule XPath:
This rule ASSERTS the following, raising an alert if FALSE:
every $value in tokenize(@groupalign) satisfies $value = ('left', 'center', 'right',
'decimalpoint')
Additional Information
The mml @groupalign attribute specifies horizontal alignment of cells in a group.
On element mml:mtd this attribute can hold one or more space-separated values.
Also on elements mml:math, mml:mstyle this attribute can hold one or more space-separated
values, which is allowed by the DTD but is not specified in the MathML 3 specification.
On element mml:maligngroup this attribute can hold one value (this is enforecd by
the DTD).
On elements mml:mtable, mml:mtr, mml:mlabeledtr this attribute can hold lists of values
grouped in { and } braces.
See JATS-0027-005 which also relates to the mml @groupalign attribute.