PDF/A in PDS4 - A Primer

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PDF/A Overview

There are so far three iterations of the PDF/A standard: PDF/A-1, PDF/A-2, and PDF/A-3. A document that conforms to one standard will not necessarily conform to the others. PDS4 requires compliance specifically to the first, PDF/A-1[1].

PDF/A-1

PDF/A-1 is based on PDF version 1.4, and imposes further restrictions.

PDF/A-1 files must include:
  • Embedded fonts[2]
  • Device-independent color[2]
  • XMP metadata[2]
PDF/A-1 files may not include:
  • Encryption[2]
  • LZW Compression[2]
  • Embedded files[2]
  • External content references[2]
  • PDF Transparency[2]
  • Multi-media[2]
  • JavaScript[2]
PDF/A-1a

Level A Conformance

  • This is the much preferred conformance level for PDS4.
PDF/A-1b

Level B Conformance

  • This is the minimum conformance level required for PDS4.

See Also

External Links

General
Backend

References

  1. ↑ Policy on Formats for PDS4 Data and Documentation. (2014, June 30). The Planetary Data System. From PDS Policies
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 19005-1 FAQ. (2006, July 10). PDF/A Joint Working Group. From NPES PDF/A FAQ
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