SENTENCE RETRIEVING SYSTEM

摘要

PURPOSE:To attain the sentence retrieval by means of a state shift table in a small size even in case a character code is long in bit length by using partial patterns obtained by dividing the character code into units equal to 2 pcs of power multiplier. CONSTITUTION:The input characters are set to low-order 8 bits of an address register 7 every 8 bits and alternately in order of high-order and low-order places from a data register 20 by a switch circuit 21. The upper 8 bits having initial values all set at 0 are supplied to an address decoder 9, and the 8-bit data is read out of an address 0 of a random access memory 8 and stored to a memory register 10. A discrimination circuit 22 neglects the contents 10 of the register 10 with a truth value action in case the high-order 8 bits of the register 7 are equal to the special value FF. Then the high-order 8 bits of the register 7 are forcibly reset ''0'' to prevent the coincidence between code patterns of different character strings.