A method and apparatus for assigning a logical level number to a symbol in a key comprising a string of symbols, and storing an entry for the key in a level of nodes in a multiway radix tree based at least in part on the logical level number instead of on a path between nodes representing every symbol in the key.

 
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> KNOWLEDGE INFORMATION MANAGING METHOD, KNOWLEDGE INFORMATION MANAGING APPARATUS, KNOWLEDGE INFORMATION INPUT-OUTPUT APPARATUS, STORAGE MEDIUM STORING KNOWLEDGE INFORMATION MANAGING PROGRAM, AND KNOWLEDGE INFORMATION MANAGING PROGRAM
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