text: Title:  Limit Variable Scope within resource files 
  Body: Presently it's not possible to limit the scope of variables defined within resource files variable section to the resource file itself. This would be helpful especially if a huge amount of xpath variables are defined within different resource files. All this xpath variables pollute the global scope unnecessarily.
  Maybe there could be a "private variables" section for resource files in the future? Or at least a private tag?
  Rainer