Any file with a .xml extension can be run as an Ant buildfile. 
  Of course, not all such files really are Ant buildfiles, but no harm is done 
  if an attempt is made to mistakenly run a non-Ant .xml file as an Ant buildfile.
In this section, the basic mechanisms for running Ant buildfiles 
  in Eclipse will be covered, using the HelloWorld.xml file created in the Editing Ant buildfiles task.
HelloWorld.xml in one of the navigation views and choose Run As 
    > Ant Build...  from its context menu.
	
	Creating Ant buildfiles
	Editing Ant buildfiles
	Saving & Reusing Ant options
	Running Ant buildfiles
	Creating a project builder Ant buildfile
	Ant buildfiles as project builders
	Executing project builders
	External tools
	Non-Ant project builders
	Stand-alone external tools