5. The method as defined in claim 4 , wherein applying a first first-level transform and applying a second-level transform comprises applying sequential transforms to the document.
5. The method as defined in claim 4 , wherein applying a first first-level transform and applying a second-level transform comprises applying sequential transforms to the document. 6. The method as defined in claim 5 , wherein applying a first first-level transform of the document stored in raw XML form comprises applying a subscription-level transform to the internal representation of the document to create a subscription-level document.