Test of frame style and spacing
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mtable frame="dashed" framespacing="0.4em 0.5ex">
<mtr>
<mtd>
<mn>1</mn>
</mtd>
<mtd>
<mn>2</mn>
</mtd>
</mtr>
<mtr>
<mtd>
<mi>x</mi>
</mtd>
<mtd>
<mi>y</mi>
</mtd>
</mtr>
</mtable>
</math>
Author: Design Science, Inc. (D. Doyle)