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Lexicographic Sorting

IP.com Disclosure Number: IPCOM000056242D
Original Publication Date: 1980-Nov-01
Included in the Prior Art Database: 2005-Feb-14

Publishing Venue

IBM

Related People

Authors:
Hunter, JE [+details]

Abstract

A lexicographic sort requires that each field be sorted once, and then possibly sorted again depending on the results of the first sort. Logically, the first sort does not take into account the case of the characters (i.e., no difference between upper or lower case letters). When matches are found using this first sort, another sort must be performed, this time taking into account the case of the letters. For one particular item, subjects consisting of all lower case letters should appear first, followed by those items with initial capital letters, and finally by those with all capital letters (or vice-versa).