11. A method for identifying one or more documents in a file system that are related to one or more specified words, comprising the steps of: storing each of said documents in said file system with an indication of a term weight for terms appearing in said corresponding document, wherein a given term weight is based on a frequency of occurrence of said corresponding term in a reference corpus; and evaluating a distance between each of said documents and said one or more specified words, wherein said distance is based on said term weights and wherein said given term weight is obtained by dividing a fractional frequency of said term in said document by a fractional frequency of said term in said reference corpus, wherein said fractional frequency of said term in said document is the number of occurrences of the term in the document divided by the total number of terms in the document and wherein said fractional frequency of said term in said reference corpus is the number of occurrences of the term in the reference corpus divided by the total number of words in the reference corpus.
11. A method for identifying one or more documents in a file system that are related to one or more specified words, comprising the steps of: storing each of said documents in said file system with an indication of a term weight for terms appearing in said corresponding document, wherein a given term weight is based on a frequency of occurrence of said corresponding term in a reference corpus; and evaluating a distance between each of said documents and said one or more specified words, wherein said distance is based on said term weights and wherein said given term weight is obtained by dividing a fractional frequency of said term in said document by a fractional frequency of said term in said reference corpus, wherein said fractional frequency of said term in said document is the number of occurrences of the term in the document divided by the total number of terms in the document and wherein said fractional frequency of said term in said reference corpus is the number of occurrences of the term in the reference corpus divided by the total number of words in the reference corpus. 12. The method of claim 11 , wherein said distance is the square root of the sum of the squares of the differences between said one or more specified words and terms in said document, using said term weights.