ci4

type check

W3C sample	WIRIS
	$x x x y θ v π ⅇ ⅇ ⅈ ⅈ γ ∞$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <plus/>
    <ci type="real">x</ci>
    <ci type="integer">x</ci>
    <ci type="rational">x</ci>
    <ci type="complex-cartesian">y</ci>
    <ci type="complex-polar"> &#x003B8;</ci>
    <ci type="vector">v</ci>
    <ci type="constant"> &#x003C0;</ci>
    <ci> &#x02147;</ci>
    <ci> &#x02147;</ci>
    <ci> &#x02148;</ci>
    <ci> &#x02148;</ci>
    <ci> &#x003B3;</ci>
    <ci> &#x0221E;</ci>
  </apply>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)