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Format

Internet Archive

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Summary

Name
Internet Archive
Version
1.0
Identifiers
  • MIME: application/x-internet-archive
  • PUID: x-fmt/219
Format type
Aggregate
Description
This is an outline record only, and requires further details, research or authentication to provide information that will enable users to further understand the format and to assess digital preservation risks associated with it if appropriate. If you are able to help by supplying any additional information concerning this entry, please return to the main PRONOM page and select ‘Add an Entry’.
Format encoding
Text
File extensions
arc
Submitted by
Digital Preservation Department / The National Archives

Relationships

Has priority over
Is previous version of

Internal signatures

Internet Archive 1.0

Description
Version block at beginning of file starts with string “filedesc://” followed by a path and filename whose filename extension is “.arc”<sp>. followed by <ip address>, <date> and “text/plain”<sp> followed by <length><nl> 1<sp>0<sp> followed by “URL IP-address Archive-date Content-type Archive-length”
Provenance
Mike Burner and Brewster Kahle. Arc File Format, Version 1.0. September 15, 1996, Internet Archive www.archive.org/web/researcher/ArcFileFormat.php

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
None
Byte Sequence
66696C65646573633A2F2F{1-132}20{1-3}2E{1-3}2E{1-3}2E{1-3}20{14}20746578742F706C61696E20{1-16}0A31203020*0A55524C2049502D6164647265737320417263686976652D6461746520436F6E74656E742D7479706520417263686976652D6C656E677468
Endianness
None

Changelog

  • V81

    Release date
    18 February 2015

    • Updated

      Internet Archive 1.0: Updated signature. Submitted by National Library of New Zealand.

  • V58

    Release date
    21 March 2012

    • Updated

      Internet Archive 1.0: Format name changed for greater accuracy and consistency. Existing signature refined by information provided by Georgia Tech Research Institute, USA.

  • V55

    Release date
    4 January 2012

    • Updated

      Alexa Archive File: File signature updated to allow compatability with DROID 5.0 and earlier versions.

  • V51

    Release date
    15 July 2011

    • Added signature

      Alexa Archive File: Signature developed through PRONOM Research.