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Format

Adobe Illustrator

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Summary

Name
Adobe Illustrator
Version
3.0 / 3.2
Identifiers
  • MIME: application/postscript
  • Apple Uniform Type Identifier: com.adobe.illustrator-image
  • PUID: fmt/418
Format type
Image (Vector)
Description
The documents (files) created by Adobe Illustrator are PostScript language documents. A PostScript language document description that minimally conforms to the Document Structuring Conventions has two main parts: a prolog and a script. The prolog encapsulates information needed by other programs to interpret the file. The script describes the graphic elements on the page. Version 3 includes graph creation.
File extensions
ai
Submitted by
Georgia Tech Research Institute / Georgia Tech Research Institute
Developed by
Adobe Systems Incorporated
Supported by
Adobe Systems Incorporated

Relationships

Has lower priority than
Has priority over

Internal signatures

Adobe Illustrator 3.x v1

Description
The first line of the file is a unique comment that declares the file contains a Postscript program and identifies the version of the Document Structuring Conventions to which the document conforms as 2.0 or 3.0. The first line may also specify that the file conforms to a version of the Encapsulated PostScript File format (EPSF). The prolog contains %%DocumentNeededResources: and the continuation %%+ procset Adobe_Illustrator_AI3 or %%+procset Adobe_IllustratorA_AI3
Provenance
http://share.auditory.ru/2011/Dmitry.Burmistrov/computer_graphics-kursovaya/Specifications/archive/AI20/ADOBE_IL.PDF http://partners.adobe.com/public/developer/en/illustrator/sdk/AI7FileFormat.pdf

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
252150532D41646F62652D322E30{16-512}2525446F63756D656E744E65656465645265736F75726365733A{1-512}25252B2070726F637365742041646F62655F496C6C7573747261746F72(5F414933|415F414933)
Endianness
None

Adobe Illustrator 3.x v2

Description
The first line of the file is a unique comment that declares the file contains a Postscript program and identifies the version of the Document Structuring Conventions to which the document conforms as 2.0 or 3.0. The prolog did not contain %%DocumentNeededResources: but did contain %%DocumentSuppliedResources: and the continuation %%+ procset Adobe_Illustrator_AI3 or %%+procset Adobe_IllustratorA_AI3
Provenance
http://share.auditory.ru/2011/Dmitry.Burmistrov/computer_graphics-kursovaya/Specifications/archive/AI20/ADOBE_IL.PDF http://partners.adobe.com/public/developer/en/illustrator/sdk/AI7FileFormat.pdf

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
252150532D41646F62652D322E30{16-512}2525446F63756D656E74537570706C6965645265736F75726365733A{1-512}25252B2070726F637365742041646F62655F496C6C7573747261746F72(5F414933|415F414933)
Endianness
None

Adobe Illustrator 3.x v3

Description
The first line of the file is a unique comment that declares the file contains a Postscript program and identifies the version of the Document Structuring Conventions to which the document conforms as 2.0 or 3.0. The first line may also specify that the file conforms to a version of the Encapsulated PostScript File format (EPSF). The prolog contains %%DocumentNeededResources: and the continuation %%+ procset Adobe_Illustrator_AI3 or %%+procset Adobe_IllustratorA_AI3

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
252150532D41646F62652D332E30{16-512}2525446F63756D656E744E65656465645265736F75726365733A{1-512}25252B2070726F637365742041646F62655F496C6C7573747261746F72(5F414933|415F414933)
Endianness
None

Adobe Illustrator 3.x v4

Description
The first line of the file is a unique comment that declares the file contains a Postscript program and identifies the version of the Document Structuring Conventions to which the document conforms as 2.0 or 3.0. The prolog did not contain %%DocumentNeededResources: but did contain %%DocumentSuppliedResources: and the continuation %%+ procset Adobe_Illustrator_AI3 or %%+procset Adobe_IllustratorA_AI3

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
252150532D41646F62652D332E30{16-512}2525446F63756D656E74537570706C6965645265736F75726365733A{1-512}25252B2070726F637365742041646F62655F496C6C7573747261746F72(5F414933|415F414933)
Endianness
None

Adobe Illustrator 3.x v5

Description
The first line of the file is a unique comment that declares the file contains a Postscript program and identifies the version of the Document Structuring Conventions to which the document conforms as 2.0 or 3.0. The prolog did not contain %%DocumentNeededResources: but did contain %%DocumentSuppliedResources: and the continuation %%+ procset Adobe_Illustrator_AI3 or %%+procset Adobe_IllustratorA_AI3
Provenance
http://share.auditory.ru/2011/Dmitry.Burmistrov/computer_graphics-kursovaya/Specifications/archive/AI20/ADOBE_IL.PDF http://partners.adobe.com/public/developer/en/illustrator/sdk/AI7FileFormat.pdf; 11/2023 (v.115)- Modified the offset values from null to 0 as part of a project to match PRONOM data with the xsd standard. Internally researched.

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
C5D0D3C6
Endianness
None
Min Frag Length
Variable
Offset
None
Max offset
None
Byte Sequence
252150532D41646F62652D332E30{16-512}2525446F63756D656E74537570706C6965645265736F75726365733A{1-512}25252B2070726F637365742041646F62655F496C6C7573747261746F72(5F414933|415F414933)
Endianness
None

Changelog

  • V115

    Release date
    15 November 2023

    • Updated

      Adobe Illustrator 3.0 / 3.2: Modified the offset values from null to 0 as part of a project to match PRONOM data with the xsd standard. Submitted by Digital Preservation Department, The National Archives (UK) (UK).

  • V91

    Release date
    25 July 2017

    • Updated

      Adobe Illustrator 3.0 / 3.2: Added additional signature for variation in BOF.

  • V89

    Release date
    8 March 2017

    • Updated

      Adobe Illustrator v3.0/3.2: Added mimetype - application/postscript

  • V69

    Release date
    19 July 2013

    • Added signature

      Adobe Illustrator 3.0/3.2: Signature provided by Georgia Technology Research Institute.

  • V60

    Release date
    11 June 2012

    • Added format

      Adobe Illustrator 3.0/3.2: Description information submitted by the National Archives and Records Administration. Partial entry added.