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Status report on proposed Data Reconfiguration Service (RFC0138)

IP.com Disclosure Number: IPCOM000004873D
Original Publication Date: 1971-Apr-28
Included in the Prior Art Database: 2001-Jul-11
Document File: 24 page(s) / 47K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.H. Anderson: AUTHOR [+9]

Abstract

PURPOSE OF THIS RFC

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 9% of the total text.

Network Working Group Bob Anderson Request for Comments: 138 Rand NIC 6715 Vint Cerf

UCLA Eric Harslem John Heafner

Rand

Jim Madden U. of Illinois Bob Metcalfe

MIT Arie Shoshani

SDC Jim White

UCSB David Wood

Mitre 28 April 1971

STATUS REPORT ON PROPOSED DATA RECONFIGURATION SERVICE

CONTENTS I. INTRODUCTION ................................. 2

Purpose of this RFC .......................... 2 Motivation ................................... 2

II. OVERVIEW OF DATA RECONFIGURATION SERVICE ..... 3

Elements of Data Reconfiguration Service ..... 3 Conceptual Network Connections ............... 3 Connection Protocols and Message Formats ..... 4 Example Connection Configurations ............ 6

III. THE FORM MACHINE ............................. 7

Input/Output Stream and Forms ................ 7 Form Machine BNF Syntax ...................... 7 Alternate Specification of Form Machine Syntax 8 Forms ........................................ 9 Rules ........................................ 10 Terms ........................................ 10

Term Format 1 .............................. 11 Term Format 2 .............................. 11 Term Format 3 .............................. 13 Term Format 4 .............................. 13 Application of a Term ...................... 14

Anderson, et al. [Page 1]

RFC 138 Data Reconfiguration Service April 1971

Restrictions and Interpretations of

Term Functions ........................... 14 Term and Rule Sequencing ..................... 16

IV. EXAMPLES ..................................... 16

Remarks ...................................... 16 Field Insertion .............................. 17 Deletion ..................................... 17 Variable Length Records ...................... 17 String Length Computation .................... 18 Transposition ................................ 18 Character Packing and Unpacking .............. 18

V. PROPOSED USES OF DATA RECONFIGURATION SERVICE 19

VI. IMPLEMENTATION PLANS ......................... 20

Appendix A ......................................... 21

Note 1 to the DRS Working Group .............. 21 Note 2 to the DRS Working Group .............. 22

I. INTRODUCTION

PURPOSE OF THIS RFC

The purpose of this RFC is to describe, in part, a proposed Network experiment and to solicit comments on any aspect of the experiment. The experiment involves a software mechanism to reformat Network data streams. The mechanism can be adapted to numerous Network application programs. We hope that the results of the experiment will lead to a further standard service that embodies the principles described in this RFC. We would like comments on the appropriateness of this work as a Network experiment and also comments on particular Network data reformatting needs that could not easily be accomplished using these techniques.

MOTIVATION

Application programs require specific data I/O formats yet the formats are different from program to program. We take the position that the Network should adapt to the individual program requirements ...