Browse Prior Art Database

TWO-LEVEL INDEX CONVERSION of TEXT to COMPOSITE DOCUMENT

IP.com Disclosure Number: IPCOM000039770D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 3 page(s) / 65K

Publishing Venue

IBM

Related People

Hedgemon, L: AUTHOR [+3]

Abstract

A method is described to permit users to input a Text document generated by DisplayWrite 2-3.1 (DW2-3.1) and have its Two-level Index structure transformed into the acceptable format for a DisplayWrite (DW4) Composite document. On DW2-3.1 the Two-level Index structure of Text documents created by these Editors are the same. On DW4, Composite documents (i.e., Text and Non-text Objects) are created by the Editor. The Two-level Index structure of these documents is different from DW2-3.1 documents. (Image Omitted) Since several DW2-3.1 users obviously have Text documents that they would like to edit on DW4, then a simple method for achieving this task should be provided.

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TWO-LEVEL INDEX CONVERSION of TEXT to COMPOSITE DOCUMENT

A method is described to permit users to input a Text document generated by DisplayWrite 2-3.1 (DW2-3.1) and have its Two-level Index structure transformed into the acceptable format for a DisplayWrite (DW4) Composite document. On DW2-3.1 the Two-level Index structure of Text documents created by these Editors are the same. On DW4, Composite documents (i.e., Text and Non-text Objects) are created by the Editor. The Two-level Index structure of these documents is different from DW2-3.1 documents.

(Image Omitted)

Since several DW2-3.1 users obviously have Text documents that they would like to edit on DW4, then a simple method for achieving this task should be provided. Data Management Services of DW4 provides a Two-level Index Conversion Service that performs easy upward compatibility of DW2 and DW3 Text documents into DW4 Composite documents. It only requires that the same media that the Text document exist on have at least three usable sectors (512 bytes/sector) available for the addition/extension of the Text Two-level Index structure. The Index structure must be extended in order to accommodate Non-text Objects which are supported through the DW4 Composite document Two-level Index structure. The Two-level Index Conversion Service must provide the following functions: 1. The L3P Datastream must not be converted so that

all of the

information/data in DW2 and DW3 Text documents

are

preserved when the Two-Level Index is converted

to a

DW4 Composite Document (i.e., footnotes,

header/footer,

body text, format changes, keyboard changes,

etc.).

2. The code page identification and code set must

not be

altered.

3. The Two-level Index structure must be extended

from having

just a Text record chain to having both Text

record and

Non-text Object chains.

4. A new file type must be defined (Composite) to

distinguish

DW2 and DW3 documents from DW4 documents. TWO-LEVEL INDEX CONVERSION OF TEXT TO COMPOSITE DOCUMENT - Continued 5. A unique Non-text Object must be reserved by the

system

that will contain general information about the

new DW4

1

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Composite document produced by the conversion. Many DW2 and DW3 users created variable-sized Text documents that contain pertinent information. It would be very time consuming for a DW4 user to create a new document with the same information that already exists in either a DW2 or DW3 Text document. The average DW2 or DW3 user would greatly appreciate having a simple method for editing their document on DW4. The new...