45. The system of claim 44 , wherein the synonym recognition unit is for considering how many fields between the document and the further document are similar and how many fields are dissimilar, in determining whether the document contains any synonyms with terms that occur in the further document.
44. The system of claim 42 , wherein the synonym recognition unit is for identifying similar fields between the document and the further document, and for identifying dissimilar fields between the document and the further document.