Portable Document Format
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Main Page > Documentation > Format policies > Portable Document Format
File extension(s)
Format registry information
Significant characteristics
See Significant characteristics of word processing files
Preservation action plan
Normalize to PDF/A
Preservation issues
PDF/A is the only version of PDF recommended for long-term preservation. According to Library of Congress, "For pragmatic reasons, when PDF/A is mandated, PDF/A-1b is usually acceptable. Full PDF/A-1a compliance, with tagged document structure, is hard to achieve except in a workflow that anticipates that objective from initial document creation." (Library of Congress Sustainability of Digital Formats: PDF/A)
Conversion test results
PDF to PDF/A using Ghostscript
Access format
PDF/A
More information
- Library of Congress Sustainability of Digital Formats: PDF,
- OIS Recommendations for PDF Files Created for Long-term Preservation and Access
- Freebase