7. The method of claim 1 , wherein the similarity computation classifies retrieved documents having a threshold computed similarity as being a match, a revision, or a related document.
7. The method of claim 1 , wherein the similarity computation classifies retrieved documents having a threshold computed similarity as being a match, a revision, or a related document. 8. The method of claim 7 , wherein when a retrieved document is classed as a revision, a most recent of the input document and retrieved document is identified for substituting for the retrieved document in the archive.