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Modify-Data Operand - Object Identification

IP.com Disclosure Number: IPCOM000102961D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 49K

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 - Object Identification

      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 now specifies the object to be
modified by a separate LLIDF structure called the OBJECT-IDENTIFIER.
The prior method to specify which DIA parameter was to be modified
was a fixed nine-byte field. The object and parameter must be
specified, and the sub-object could only be specified once, or not at
all. Not all objects could be specified by this technique. The
OBJECT-IDENTIFIER allows any object in the DIA model to be specified.
It consists of three parts; the object, the sub-object, and the
parameter. The object must be specified once. The parameter m...