31. The computer apparatus of claim 24, wherein said description includes a first set of nodes that are each associated with: at least one region from said regions, and selection criteria; and the step of selecting source text includes selecting a first node from said first set of nodes based on whether selection criteria associated with said first node is satisfied.
33. The computer apparatus recited in claim 31, in which the step of receiving a request further includes the step of receiving a request from the client, wherein the request includes a value of TRUE specified for a "selective" parameter.