Browse Prior Art Database

Preservation of Data Stream Controls Without Impact on Another Data Stream's Integrity

IP.com Disclosure Number: IPCOM000047343D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 13K

Publishing Venue

IBM

Related People

Agnew, PW: AUTHOR [+4]

Abstract

In transforming from one type of editable document form to another, the problem of preserving unsupported controls from the first data stream for subsequent retransformation needs to be addressed. It would obviously be efficient to preserve any unsupported controls for later use when the transformation process is reversed without violating the logical integrity of the transformed data stream. In addition, it would be advantageous to display the unsupported control so that the terminal user is aware that it is there and can act accordingly. It is assumed that the initial data stream is OIIA-L3 (Office Information Interchange Architecture, Level 3), hereinafter identified as L3, and that the desired transformation is from L3 to DCF (Document Composition Facility).

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Preservation of Data Stream Controls Without Impact on Another Data Stream's Integrity

In transforming from one type of editable document form to another, the problem of preserving unsupported controls from the first data stream for subsequent retransformation needs to be addressed. It would obviously be efficient to preserve any unsupported controls for later use when the transformation process is reversed without violating the logical integrity of the transformed data stream. In addition, it would be advantageous to display the unsupported control so that the terminal user is aware that it is there and can act accordingly. It is assumed that the initial data stream is OIIA-L3 (Office Information Interchange Architecture, Level 3), hereinafter identified as L3, and that the desired transformation is from L3 to DCF (Document Composition Facility). Such a transformation is of the type that is envisioned for the conversion of a document prepared on a Displaywriter, which would be in L3 form, to a form that can be edited on a terminal connected to a host IBM System/370, the DCF form. The initial transformation would allow preparation of a document on the Displaywriter, transformation to DCF form, and editing on the terminal. A subsequent transformation would change the editable form of the document back to L3 and allow final polishing and/or printing on the Displaywriter. Unfortunately, L3 includes several single byte controls that are not supported in DCF, nor will they be recognized by the DCF formatter. They cannot be ignored since they would cause confusion if left untreated. For example, a blank or misleading character might be output to the...