The National Archives
Search our website
  • Search our website
  • Search our records
   
 
Image of software box and CD PRONOM
Welcome (PRONOM  home page) About PRONOM Add an entry
Search Help - opens in a new window Information resources - opens in a new window
 
 
 

*Details: File format summary

   
 

 

Search by keyword Search by file format Search by PUID Search by software Search by vendor Search by lifecycles Search by Migration Pathway

Details for:

Save as... XML | CSV Printer friendly version
 
 

Summary

Name Acrobat PDF/A - Portable Document Format
Version 1a
Other names PDF/A (1)
Identifiers MIME:  application/pdf
Apple Uniform Type Identifier:  com.adobe.pdf
PUID:  fmt/95
Family  
Classification Page Description
Disclosure Full
Description The Portable Document Format/ Archive is a format designed for long term preservation by Adobe Systems. PDF/A is a simplified version of PDF 1.4, with all of the features from PDF 1.4 that would impede long term preservation removed. Removed features include Javascript, Audio/Visual content, LZW compression and encryption. A major principle of PDF/A is that it is self contained and not reliant on externalities thus all font and colour information is encoded into the file. PDF/A files are larger than other types of PDF files due to the need for embedded information. PDF/A supports two levels of compliance PDF/A1-a (Accessible) and PDF/A1-b (Basic). PDF/A1-a is fully ISO 19005-1:2005 (PDF/A-1) compliant whereas PDF/A1-b is less stringent and not compliant. PDF/A1-a requires tagged PDF and Unicode whereas PDF/A1-b does not.
Orientation Binary
Byte order Big-endian (Motorola)
Related file formats Has priority over Acrobat PDF 1.0 - Portable Document Format (1.0)
Has priority over Acrobat PDF 1.1 - Portable Document Format (1.1)
Has priority over Acrobat PDF 1.2 - Portable Document Format (1.2)
Has priority over Acrobat PDF 1.3 - Portable Document Format (1.3)
Has priority over Acrobat PDF 1.4 - Portable Document Format (1.4)
Has priority over Acrobat PDF 1.5 - Portable Document Format (1.5)
Has priority over Acrobat PDF 1.6 - Portable Document Format (1.6)
Has priority over TrueType Font  
Has priority over Acrobat PDF 1.7 - Portable Document Format (1.7)
Technical Environment  
Released 01 Oct 2005
Supported until  
Format Risk  
Developed by None.
Supported by None.
Source Digital Preservation Department / The National Archives
Source date 17 Dec 2005
Source description  
Last updated 22 Oct 2009
Note  
Top of page Top of page
 
         
The National Archives Newsletter Icon

Send me The National Archives’ newsletter

A monthly round-up of news, blogs, offers and events.