| 摘要 |
A method for storing and accessing data in the operation of a program driven computer system for carrying out an industrial process, which system includes a non-volatile, long access time memory medium and a volatile, short access time memory medium, which method includes: configuring the non-volatile and volatile memory media into a unitary, relational database composed of a plurality of tables each composed of an ordered set of data elements; storing in the non-volatile memory medium a set of data elements which forms at least a first table of the database and which is required by the process infrequently and/or need not be accessed rapidly; storing in the volatile memory medium a set of data elements which forms at least a second table of the database which must be rapidly accessed; executing a plurality of programs in cooperation with data elements forming the database in order to control the process; and establishing communication between the programs and the database via an interface which causes the programs to address any selected table of the database in a manner which is independent of the specific memory medium in which that table is stored.
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