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<html>
  <head>
    <title>mo invalid attributes</title>
    <meta charset="utf-8"/>
  </head>
  <body>

    <!-- This test verifies that invalid attributes are ignored. Note that
         attributes are case-sensitive. -->

    <!-- This operator should be infix. -->
    _<math><mi>x</mi><mo form="INVALID">+</mo><mi>x</mi></math>_<br/>
    _<math><mi>x</mi><mo form="pReFiX">+</mo><mi>x</mi></math>_<br/>

    <!-- This operator should not be stretchy. -->
    _<math><mo stretchy="INVALID">|</mo><mspace height="2em" depth="2em"/></math>_<br/>
    _<math><mo stretchy="Strechy">|</mo><mspace height="2em" depth="2em"/></math>_<br/>

    <!-- This operator should have the default spacing. -->
    _<math><mo lspace="INVALID">X</mo></math>_<br/>
    _<math><mo rspace="INVALID">X</mo></math>_<br/>
    _<math><mo lspace="INVALID" rspace="INVALID">X</mo></math>_<br/>

  </body>
</html>