PDF / A is an ISO standardized version of the Portable Document Format (PDF) that specializes in archiving and long-term preservation of digital documents. PDF / A differs from the standard PDF format by prohibiting features unsuitable for long-term archiving, such as font binding (as opposed to font embedding) and encryption.
The main advantage of this format is that PDF / A format files are accurate to the original documents: the fonts, images, graphic objects and formatting of the source file are preserved, regardless of the application and the platform used to create it.
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