| http://www.w3.org/ns/prov#value | - h in claim 8, said character substitution encoding means including:hash table means for locating strings of length N in said history buffer including: a hash function for generating a hash value when said hash function is applied to a string of length N, wherein N is an integer greater than one; a hash table of pointers to each string of length N stored in said history buffer, wherein each said po
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