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Designating Structured Field Sequences

IP.com Disclosure Number: IPCOM000102933D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 54K

Publishing Venue

IBM

Related People

Barker, BA: AUTHOR [+3]

Abstract

Structured fields are self-contained independent units of information within a data stream. At times, however, the data content of two or more structured fields may cause the structured fields to be interdependent. In such cases, the order dependency of the structured fields must be indicated to prevent improper structuring of a data stream by applications that may not be able to process the structured field's data content.

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Designating Structured Field Sequences

      Structured fields are self-contained independent units of
information within a data stream.  At times, however, the data
content of two or more structured fields may cause the structured
fields to be interdependent.  In such cases, the order dependency of
the structured fields must be indicated to prevent improper
structuring of a data stream by applications that may not be able to
process the structured field's data content.

      To solve this problem a Flag parameter with a Segmentation
Indicator is provided in each structured field introducer.  When the
Segmentation Indicator is off, an application may insert at the next
structured field boundary any other structured field that may validly
be inserted into the data stream at that boundary.  The architecture
defines the valid structured fields based on a state concept, such as
document, page, or object state, and not on the status of the content
of a structured field.  When the Segmentation Indicator is on, the
data content of the structured field is continued in the next
structured field and no structured field should be inserted at the
next structured field boundary.  Unless the data dependency of the
two adjoining structured fields is eliminated by restructuring the
data, no structured field may be inserted between the two adjoining
structured fields.  To do so, would render the data stream incapable
of being parsed.

      The existence of the Segmentat...