4. The method of claim 1 , wherein ordering the sub-expression in a model for the XPATH input expression, comprises: rendering a visual representation of the model in a user interface for an integrated development environment (IDE).
4. The method of claim 1 , wherein ordering the sub-expression in a model for the XPATH input expression, comprises: rendering a visual representation of the model in a user interface for an integrated development environment (IDE). 5. The method of claim 4 , wherein producing the result set for the sub-expression, comprises: rendering the result set in a result view for the user interface.