Example

The following expression returns apples.

<switch>
   <s>A</s>
   <case default=’true’>
      <s>unknown</s>
   </case>
   <case>
      <s>A</s>
      <s>apples</s>
   </case>
   <case>
      <s>B</s>
      <s>oranges</s>
   </case>
</switch>