72. A system as defined in claim 71, wherein the interrogation data characteristic statistics generated by the interrogation processor include a frequency distribution of characters found in the scanned record, a rate of occurrence for each character in the frequency distribution, and an entropy value of the scanned record; and the interrogation processor further comprises: means for completing a stabilization procedure comprising repeating the steps of selecting a current record block for scanning and generating a current set of the interrogation statistics, selecting a new record block, different from the current block, for scanning and generating a new set of the interrogation statistics, and comparing like statistics of the current set of statistics and the new set of statistics, until the difference between the like statistics is below a predetermined stabilization threshold value or the number of scanned record blocks equals a predetermined scanning limit value, and thereupon storing the new block in an interrogation buffer and storing the set of new interrogation statistics in the memory if the entropy value is below a predetermined entropy threshold value.
79. A system as defined in claim 72, further including: means for selecting dictionary segments until the total number of dictionary segments selected for the system-built dictionary is equal to a predetermined limit number.