The BagIt File Packaging Format (V0.97)
draft-kunze-bagit-14

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Last updated 2016-10-21
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Network Working Group                                           J. Kunze
Internet-Draft                                California Digital Library
Intended status: Informational                                J. Littman
Expires: April 24, 2017           George Washington University Libraries
                                                               L. Madden
                                                     Library of Congress
                                                              E. Summers
                                                  University of Maryland
                                                                A. Boyko

                                                               B. Vargas
                                                        October 21, 2016

                The BagIt File Packaging Format (V0.97)
                          draft-kunze-bagit-14

Abstract

   This document specifies BagIt, a hierarchical file packaging format
   for storage and transfer of arbitrary digital content.  A "bag" has
   just enough structure to enclose descriptive "tags" and a "payload"
   but does not require knowledge of the payload's internal semantics.
   This BagIt format should be suitable for disk-based or network-based
   storage and transfer.  BagIt is widely used in the practice of
   digital preservation.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on April 24, 2017.

Kunze, et al.            Expires April 24, 2017                 [Page 1]
Internet-Draft                    BagIt                     October 2016

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Purpose . . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements  . . . . . . . . . . . . . . . . . . . . . .   3
     1.3.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Structure . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Required Elements . . . . . . . . . . . . . . . . . . . .   5
       2.1.1.  Bag Declaration: bagit.txt  . . . . . . . . . . . . .   5
       2.1.2.  Payload Directory: data/  . . . . . . . . . . . . . .   5
       2.1.3.  Payload Manifest: manifest-<alg>.txt  . . . . . . . .   5
     2.2.  Optional Elements . . . . . . . . . . . . . . . . . . . .   6
       2.2.1.  Tag Manifest: tagmanifest-<alg>.txt . . . . . . . . .   6
       2.2.2.  Bag Metadata: bag-info.txt  . . . . . . . . . . . . .   6
       2.2.3.  Fetch File: fetch.txt . . . . . . . . . . . . . . . .   8
       2.2.4.  Other Tag Files . . . . . . . . . . . . . . . . . . .   9
     2.3.  Text Tag File Format  . . . . . . . . . . . . . . . . . .   9
     2.4.  Bag Checksum Algorithms . . . . . . . . . . . . . . . . .  10
   3.  Complete, Incomplete, and Valid bags  . . . . . . . . . . . .  10
   4.  Serialization . . . . . . . . . . . . . . . . . . . . . . . .  11
   5.  Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Example of a basic bag  . . . . . . . . . . . . . . . . .  12
     5.2.  Another example bag . . . . . . . . . . . . . . . . . . .  12
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
     6.1.  Special directory characters  . . . . . . . . . . . . . .  14
     6.2.  Control of URLs in fetch.txt  . . . . . . . . . . . . . .  14
     6.3.  File sizes in fetch.txt . . . . . . . . . . . . . . . . .  14
   7.  Practical Considerations (non-normative)  . . . . . . . . . .  14
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