<project name="test"
         default="run-macro"
         xmlns:xyz="http://xyz">

	<macrodef name="echo-macro"
	          uri="http://xyz">
		<attribute name="str" />
		<element name="some-tasks" />
		<sequential>
			<echo>@{str}</echo>
			<some-tasks/>
		</sequential>
	</macrodef>

	<target name="run-macro">
		
		<xyz:echo-macro str="s">
			
		</xyz:echo-macro>
	</target>
	
	<presetdef name="my-javac" uri="http://xyz">
		<javac fork="yes"></javac>
	</presetdef>
	
	
</project>