Data processing system utilizing data field descriptors for proc

Details Data processing system utilizing data field descriptors for proc Data processing system utilizing data field descriptors for proc

1973-12-13

1978-01-10

Boudreau, Leo H.

Boots, shoes, and leggings

G06F 700

Patent

active

040683001

ABSTRACT:
A data field descriptor extends the flexibility of operand accesses by defining the attributes of a data field with regard to length, location and form of data representation at execution time. This delay of binding the operand accesses until execution time supports both data independence and security by permitting programs to be compiled without any restrictions imposed by the attributes of data fields. At execution time the necessary information is provided through a register so that the data field information may be correctly processed. With this feature a program is permitted to survive the change in formats of its input and output files without repeatedly undergoing the expensive operation of compilation. Also permitted is processing of files containing data field values which are not uniformly formatted throughout the file but which are self-defining through a data field descriptor.

REFERENCES:
patent: 3422405 (1969-01-01), Packard et al.
patent: 3654621 (1972-04-01), Bock et al.
patent: 3680058 (1972-07-01), De Santis et al.
patent: 3691554 (1972-09-01), Marschall

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