Attribute: indentalignfirst
In <mml:mo>
indentalignfirst (left|center|right|auto|id|indentalign) #IMPLIED
In <mml:math>
indentalignfirst (left|center|right|auto|id|indentalign) #IMPLIED
In <mml:mstyle>
indentalignfirst (left|center|right|auto|id|indentalign) #IMPLIED