Attribute: frame
In <mml:mtable>
frame (none|solid|dashed) #IMPLIED
In <mml:math>
frame (none|solid|dashed) #IMPLIED
In <mml:mstyle>
frame (none|solid|dashed) #IMPLIED
frame (none|solid|dashed) #IMPLIED
frame (none|solid|dashed) #IMPLIED
frame (none|solid|dashed) #IMPLIED