9. A method implemented by a computer comprising at least one processor for creating classes for classifying digitized documents comprising: generating a plurality of word pairs, each word pair comprising a word from a first digitized document, and a corresponding word from a second digitized document; computing for each word pair first location information for the word that indicates a location of the word in the first digitized document relative to other words in the first digitized document; computing for each word pair second location information for the corresponding word that indicates a location of the corresponding word in the second digitized document relative to other words in the second digitized document; comparing the first and second location information; and creating one or more classes responsive to the comparison to classify digitized documents similar to the first digitized document, and to classify digitized documents similar to the second digitized document.
12. The method of claim 9 wherein the first location information comprises top location information, and bottom location information, the top location information is associated with a top portion of the first digitized document, and comprises a location of a word in the top portion of the first digitized document relative to other words in the top portion, and the bottom location information is associated with a bottom portion of the first digitized document and comprises a location of a word in the bottom portion of the first digitized document relative to other words in the bottom portion.