if Tag

If tag is a command tag. If wraps a set of command tags with a condition. When the condition defined in its attribute evaluates to true, the command tags in its body will be executed.

The syntax is:

  <if value1="expression1" op="comparator" value2="expression2">
     <!-- add other command tags here --!>
  </if>

The attributes value1, op and value2 are the same as assert tag.