21. The method of claim 18 further comprises assigning an identification property to a given data item in the layout after the given data item has been arranged in the layout.
21. The method of claim 18 further comprises assigning an identification property to a given data item in the layout after the given data item has been arranged in the layout. 25. The method of claim 21 further comprises assigning a location method to a given data item in the layout, where the location method specifies a method by which to locate the given data item in the input data.