3. The method of claim 1 , wherein selecting a document version from the plurality of document versions includes selecting a document version having both a qualified priority of authority based on a priority measure and a qualified length based on a length measure.
5. The method of claim 3 , wherein selecting a document version from the plurality of document versions further includes: in response to none of the plurality of document versions having both a qualified priority of authority and a qualified length, selecting a document version having the greatest length.