mORMot Open Source

ab

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From: France

Registered: 2010-06-21

Posts: 14,655

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PDF/A-1 generation

Our SynPdf unit can now generate PDF/A-1 files if the new PDFA1 property is set to true.

This feature is available starting with this source code revision:
http://synopse.info/fossil/info/5274188699f

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,655

Website

Re: PDF/A-1 generation

As stated by wikipedia:

PDF/A is a file format for the long-term archiving of electronic documents. It is based on the PDF Reference Version 1.4 from Adobe Systems Inc. (implemented in Adobe Acrobat 5 and latest versions) and is defined by ISO 19005-1:2005, an ISO Standard that was published on October 1, 2005:
Document Management - Electronic document file format for long term preservation - Part 1: Use of PDF 1.4 (PDF/A-1)

A new version of PDF/A based on PDF 1.7 - ISO 32000-1 is currently under development (ISO/DIS 19005-2).[1]

PDF/A is in fact a subset of PDF, obtained by leaving out PDF features not suited to long-term archiving. This is similar to the definition of the PDF/X subset for the printing and graphic arts.

In addition, the standard places requirements on software products that read PDF/A files.
A "conforming reader" must follow certain rules including following color management guidelines, using embedded fonts for rendering, and making annotation content available to users.

Source: http://en.wikipedia.org/wiki/PDF/A

As a PDF/A document must embed all fonts that it uses, a PDF/A file will often be bigger than an equivalent PDF file that does not have the fonts embedded. This may be undesirable when archiving large numbers of small files that all use the same fonts, since a separate copy of each font will be embedded in each file.

See also http://www.digitalpreservation.gov/form … 0125.shtml