Browse Prior Art Database

The Application/CALS-1840 Content-type (RFC1895)

IP.com Disclosure Number: IPCOM000004149D
Original Publication Date: 1996-Feb-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 5 page(s) / 10K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

E. Levinson: AUTHOR

Abstract

This memorandum provides guidelines for using the United States Department of Defense Military Standard MIL-STD-1840, "Automated Interchange of Technical Information," with the Internet electronic mail standards, RFC 822 and RFC 1521. Electronic mail provides a more convenient mechanism that delivery via physical media for certain types and quantities of data. Software already exists to support data exchanges based on MIL-STD-1840 and it can continue to be used in conjunction with electronic mail exchanges defined in this document. This document defines a new media type and a MIME message structure for exchanging data in conformance with MIL-STD-1840.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 31% of the total text.

Network Working Group E. Levinson

Request for Comments: 1895 Accurate Info. Sys., Inc.

Category: Informational February 1996

The Application/CALS-1840 Content-type

Status of this Memo

This memo provides information for the Internet community. This memo

does not specify an Internet standard of any kind. Distribution of

this memo is unlimited.

Abstract

This memorandum provides guidelines for using the United States

Department of Defense Military Standard MIL-STD-1840, "Automated

Interchange of Technical Information," with the Internet electronic

mail standards, RFC 822 and RFC 1521. Electronic mail provides a

more convenient mechanism that delivery via physical media for

certain types and quantities of data. Software already exists to

support data exchanges based on MIL-STD-1840 and it can continue to

be used in conjunction with electronic mail exchanges defined in this

document. This document defines a new media type and a MIME message

structure for exchanging data in conformance with MIL-STD-1840.

1. Introduction

The United States Department of Defense (DOD) has defined a standard,

MIL-STD-1840 [1840], for the exchange of digital data. Most

applications of that standard use 9-track tape as the transport

medium. The Application/CALS-1840 media-type is proposed to

facilitate such exchanges using the Multipurpose Internet Mail

Extensions [MIME] and network based transport media, i.e. electronic

mail [822].

This memo has been reviewed and authorized by the Continuous

Acquistion and Life-cycle Support (CALS) Industry Steering Group

(ISG). CALS is a US DOD initiative for the use and exchange of

digital data. The Industry Steering Group, which consists of members

drawn from government and industry, guides the development of CALS

standards such as [1840].

2. Definition

An [1840] exchange consists of a set of files with well defined file

names (see below). Each set consists of a declaration file and one

or more data files. The data files, in turn, consist of header

records immediately followed by the data. The data itself may be

formatted in accordance with a published specification or a

contractual agreement.

MIL-STD-1840 encodes the file's data type in the file name.

It might seem appropriate to transform the 1840 headers into MIME

headers and use the appropriate media type, essentially transforming

the 1840 files into MIME body parts. There are three reasons for not

doing that. First, not all of the "types" used in [1840] are

registered MIME types. Second, there exists an installed base of

software capable of reading the 1840 formatted files and processing

the data appropriately. Finally the three existing revisions to the

standard have maintained the same file structure. Consequently, a

processor for the data may be able to handle any one of the

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