28. The method of claim 27 , further comprising: modifying the one of the first or second representations based on a first subset of the first set of modifications upon a user action indicating approval of the first subset of the first set of modifications; and automatically modifying the second set of modifications to be made in the unmodified one of the first or second representation based on the first subset of the first set of modifications.
28. The method of claim 27 , further comprising: modifying the one of the first or second representations based on a first subset of the first set of modifications upon a user action indicating approval of the first subset of the first set of modifications; and automatically modifying the second set of modifications to be made in the unmodified one of the first or second representation based on the first subset of the first set of modifications. 29. The method of claim 28 , further comprising: modifying the unmodified one of the first or second representation based on a second subset of the second set of modifications.