RETRIEVAL SYSTEM FOR RELATIONAL DATA BASE BY PROLOG LANGUAGE

摘要

PURPOSE:To eliminate the need for data transfer from an existing data base to the fact description of a PROLOG language by utilizing a data in an existing relational data base as it is in place of the program description of the fact part in the PROLOG language. CONSTITUTION:The retrieval system of the relational data base by the PROLOG language consists of a program 1 described by the PROLOG language, a PRO LOG language processing means 3 having an interface 4 processing the program 1 and retrieving the relational data base, a relational data base management system 5 started by a retrieval instruction from the means 3, and a relational data base 6 managed by the relational data base management system 5. The fact data description to the part using the fact data in the existing relational data base is omitted from the program 1 described by the PROLOG language. Instead of it, a description is made to a function utilizing the fact data in the existing data base.