Comparing Digital Libraries: Five criterion for comparison

This is another assignment from Jian Qin's graduate seminar on Digital Libraries at Syracuse University School of Information Studies. In it, I develop five (5) distinct criterion for comparing digital libraries, then proceed to make the comparisons in a systematic way.  Indeed, I personally feel the criterion I developed are more useful than those proposed by Saracevic (2005) and Choudhury (2002), though this model I will neither test, nor believe such kinds of models of better/worse criterion are particularly useful, other than excercises in thought.