PDF/A
< PDF
| Filename extension |
.pdf |
|---|---|
| Internet media type |
application/pdf |
| Type code | 'PDF ' (including a single trailing space) |
| Uniform Type Identifier (UTI) | com.adobe.pdf |
| Magic number | %PDF |
| Developed by | ISO |
| Initial release | October 1, 2005 |
| Extended from | |
| Standard | ISO 19005 |
PDF/A is an ISO-standardized version of the Portable Document Format (PDF) specialized for use in the archiving and long-term preservation of electronic documents. PDF/A differs from PDF by prohibiting features unsuitable for long-term archiving, such as font linking (as opposed to font embedding) and encryption. The ISO requirements for PDF/A file viewers include color management guidelines, support for embedded fonts, and a user interface for reading embedded annotations.