10. The computer-implemented method of claim 9 , wherein the terms are determined to occur frequently in hyperlinks by determining that each of the terms has at least a threshold frequency of occurrence in electronic documents that have been previously accessed by the computer system.
9. The computer-implemented method of claim 1 , further comprising, before adding the portions as entries to the dictionary, pre-populating the dictionary for the one document with terms that are determined to occur frequently in hyperlinks.