title: How to use attribute URI in ANT MacroDef task?
body: <p>I read doc page on <a href="http://ant.apache.org/manual/Tasks/macrodef.html" rel="nofollow">http://ant.apache.org/manual/Tasks/macrodef.html</a>, but I can understand.
  There are no examples.
  How to use attribute URI in ANT MacroDef task?</p>