4. The method of claim 1 , wherein the output presentation comprises a web page; wherein identifying the pattern comprises identifying that the plurality of output elements comprise data from a database; wherein determining the modification to the source element corresponding to a modification to the of the plurality of output elements comprises determining a modification to the data stored in the database.
4. The method of claim 1 , wherein the output presentation comprises a web page; wherein identifying the pattern comprises identifying that the plurality of output elements comprise data from a database; wherein determining the modification to the source element corresponding to a modification to the of the plurality of output elements comprises determining a modification to the data stored in the database. 5. The method of claim 4 , further comprising: determining, by the editor application, that the output element and an additional output element of the plurality of output elements correspond to a common record of the database; and applying, by the editor application, a modification to the additional output element that includes part of the modification to the output element.