LayoutTests/mathml/presentation/mo-form.html

<!doctype html>
<html>
  <head>
    <title>attribute form</title>
    <meta charset="utf-8"/>
  </head>
  <body>

    <!-- This checks the effect of @form on a prefix operator. -->
    _<math><mo form="infix">∇</mo></math>_
    _<math><mo form="prefix">∇</mo></math>_
    _<math><mo form="postfix">∇</mo></math>_

    <!-- This checks the effect of @form on an infix operator. -->
    _<math><mo form="infix">⋉</mo></math>_
    _<math><mo form="prefix">⋉</mo></math>_
    _<math><mo form="postfix">⋉</mo></math>_

    <!-- This checks the effect of @form on a postfix operator. -->
    _<math><mo form="infix">♭</mo></math>_
    _<math><mo form="prefix">♭</mo></math>_
    _<math><mo form="postfix">♭</mo></math>_

  </body>
</html>