16. The system of claim 15 , further comprising a ranking component configured to compute a ranking for at least one of the one or more identified elements and to compute a ranking for the first clinical document in relation to the second clinical document.
16. The system of claim 15 , further comprising a ranking component configured to compute a ranking for at least one of the one or more identified elements and to compute a ranking for the first clinical document in relation to the second clinical document. 18. The system of claim 16 , wherein the ranking component computes the rankings based on identical phrases or sentences that are repeated that occur infrequently with respect to a corpus of clinical documents.