Browse Prior Art Database

Modify-Data Operand - Format 1 Wrapper

IP.com Disclosure Number: IPCOM000102960D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 55K

Publishing Venue

IBM

Related People

Janis, FL: AUTHOR

Abstract

This paper deals with improvements to the DIA MODIFY-DATA operand. This operand is used to make any changes to parameters within DIA objects. These parameters conform to the Document Interchange Architecture and must be changed according to the rules of the architecture. The MODIFY-DATA operand should be as flexible as possible to make modification of DIA Objects and parameters as easy as possible.

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Modify-Data Operand - Format 1 Wrapper

      This paper deals with improvements to the DIA MODIFY-DATA
operand. This operand is used to make any changes to parameters
within DIA objects. These parameters conform to the Document
Interchange Architecture and must be changed according to the rules
of the architecture. The MODIFY-DATA operand should be as flexible as
possible to make modification of DIA Objects and parameters as easy
as possible.

      The MODIFY-DATA operand was very limited in scope and function.
It only allowed the identification of a parameter by a set of three
fixed fields. It only allowed a value to be added to or deleted from
a parameter. It limited the length of a value to a maximum of 243
bytes. There was introduced to the architecture new parameters which
exceeded these boundaries and therefore could not be modified by the
existing MODIFY-DATA operand.

      The DIA MODIFY-DATA operand structure has been changed to allow
each piece of the operand to be specified by a separate LLIDF
identifier. The previous structure had each set of pieces specified
by a LT identifier as part of a single LLIDF identifier. The LT
structure limited all pieces to a length of 253 bytes with the LT
structure taking the first 2 bytes giving a total length of 255 bytes
as the maximum length possible. Each piece of the MODIFY-DATA operand
can now be as big as 32,763 bytes. The pieces making up the
MODIFY-DATA operand are the introducer, the object identifier, the...