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From wikipedia

PDF/A-1
Part 1 of the standard was first published on September 28, 2005,[2] and specifies two levels of conformance for PDF files:[12]

PDF/A-1b – Level B (basic) conformance
PDF/A-1a – Level A (accessible) conformance
Level B conformance requires only that standards necessary for the reliable reproduction of a document's visual appearance be followed, while Level A conformance includes all Level B requirements in addition to features intended to improve a document's accessibility, such as:

Language specification
Hierarchical document structure
Tagged text spans and descriptive text for images and symbols
Character mappings to Unicode
Level A conformance was intended to increase the accessibility of conforming files for physically impaired users by allowing assistive software, such as screen readers, to more precisely extract and interpret a file's contents.[12] A later standard, PDF/UA, was developed to eliminate what became considered some of PDF/A's shortcomings, replacing many of its general guidelines with more detailed technical specifications.[13]

PDF/A-2
Part 2 of the standard, published on June 20, 2011,[3] addresses some of the new features added with versions 1.5, 1.6 and 1.7 of the PDF Reference. PDF/A-1 files will not necessarily conform to PDF/A-2, and PDF/A-2 compliant files will not necessarily conform to PDF/A-1.

Part 2 of the PDF/A Standard is based on a PDF 1.7 (ISO 32000-1), rather than PDF 1.4 and offers a number of new features:

JPEG 2000 image compression
support for transparency effects and layers
embedding of OpenType fonts
provisions for digital signatures in accordance with the PDF Advanced Electronic Signatures – PAdES standard
the option of embedding PDF/A files to facilitate archiving of sets of documents with a single file.[10]
Part 2 defines three conformance levels. PDF/A-2a and PDF/A-2b correspond to conformance levels a and b in PDF/A-1. A new conformance level, PDF/A-2u, represents Level B conformance (PDF/A-2b) with the additional requirement that all text in the document have Unicode mapping.[12][14]

PDF/A-3
Part 3 of the standard, published on October 15, 2012,[4] differs from PDF/A-2 in only one regard – it allows embedding of arbitrary file formats (such as XML, CSV, CAD, word-processing documents, spreadsheet documents, and others) into PDF/A conforming documents.[15]

PDF/A-4
Part 4 of the standard, based on PDF 2.0, is expected to be published in 2018.

Author:	BnNSqE [ Thu Jan 22, 2015 7:38 am ]
Post subject:	PDF/A-3 in Version 1.5?
Good Morning, I want to use PDFsharp in the future. But I want to use it with the "FeRD"-standard (http://www.ferd-net.de/). So I need to use PDFsharp with the PDF/A-3 (ISO 19005-3:2012. Part 3) standard. Will you implement it in 1.5? Is there a specific release date for this? Regards, BnNSqE

Author:	Thomas Hoevel [ Thu Jan 22, 2015 10:30 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
Hi! PDF/A is on the roadmap, but not yet for version 1.5.

Author:	riccardo [ Wed Jan 13, 2016 9:37 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
Me too needs PDF/A support, it is a new mandatory requirement for my application

Author:	yboompook [ Tue Apr 03, 2018 9:59 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
hello everybody I would like to know where is the work on PDF/a-3 or PDF/a-2? is it going to be release soon? is it possible to help? regards,

Author:	Thomas Hoevel [ Tue Apr 03, 2018 12:20 pm ]
Post subject:	Re: PDF/A-3 in Version 1.5?
yboompook wrote: I would like to know where is the work on PDF/a-3 or PDF/a-2? PDF/A is on the roadmap, but not yet for version 1.5. yboompook wrote: is it possible to help? Take the current source code, make the changes that are needed for PDF/A, and give us the new and modified files. I do not know what's missing for PDF/A, so I do not know how simple or complicated this task will be. We have some support for XMP in the current internal build. I don't know what else is needed for PDF/A. A list of tasks that must be tackled in PDFsharp for PDF/A would help to get us started.

PDFsharp & MigraDoc Foundation http://forum.pdfsharp.de/

PDF/A-3 in Version 1.5? http://forum.pdfsharp.de/viewtopic.php?f=4&t=3031	Page 1 of 1

Author:	yboompook [ Tue Apr 03, 2018 1:13 pm ]
Post subject:	Re: PDF/A-3 in Version 1.5?
It has lot of obligation where in non PDF/A has optionable PDA/A must have or be Device independent 100% selfcontained Guaranteed WYSIWIG Guaranteed color reproduction Contains XMP metadata Guaranteed accessibility across mutiple platforms/systems Embedded fonts Free from proprietary constraints Able to capture document' logical structure All this feature a optionable in normal PDF and not just an option PDF/A PDF/A add Archival standard appoved by ISO as a obligation. PDF/A-2 add enclosing PDF into the PDF as an option PDF/A-3 add enclosing any MIMES extention into the PDF as an option it's a open source validator http://verapdf.org/home/ type "PDF PDF/A" in google image it's a cuples of copywrited image that are very expressive Quote: From wikipedia PDF/A-1 Part 1 of the standard was first published on September 28, 2005,[2] and specifies two levels of conformance for PDF files:[12] PDF/A-1b – Level B (basic) conformance PDF/A-1a – Level A (accessible) conformance Level B conformance requires only that standards necessary for the reliable reproduction of a document's visual appearance be followed, while Level A conformance includes all Level B requirements in addition to features intended to improve a document's accessibility, such as: Language specification Hierarchical document structure Tagged text spans and descriptive text for images and symbols Character mappings to Unicode Level A conformance was intended to increase the accessibility of conforming files for physically impaired users by allowing assistive software, such as screen readers, to more precisely extract and interpret a file's contents.[12] A later standard, PDF/UA, was developed to eliminate what became considered some of PDF/A's shortcomings, replacing many of its general guidelines with more detailed technical specifications.[13] PDF/A-2 Part 2 of the standard, published on June 20, 2011,[3] addresses some of the new features added with versions 1.5, 1.6 and 1.7 of the PDF Reference. PDF/A-1 files will not necessarily conform to PDF/A-2, and PDF/A-2 compliant files will not necessarily conform to PDF/A-1. Part 2 of the PDF/A Standard is based on a PDF 1.7 (ISO 32000-1), rather than PDF 1.4 and offers a number of new features: JPEG 2000 image compression support for transparency effects and layers embedding of OpenType fonts provisions for digital signatures in accordance with the PDF Advanced Electronic Signatures – PAdES standard the option of embedding PDF/A files to facilitate archiving of sets of documents with a single file.[10] Part 2 defines three conformance levels. PDF/A-2a and PDF/A-2b correspond to conformance levels a and b in PDF/A-1. A new conformance level, PDF/A-2u, represents Level B conformance (PDF/A-2b) with the additional requirement that all text in the document have Unicode mapping.[12][14] PDF/A-3 Part 3 of the standard, published on October 15, 2012,[4] differs from PDF/A-2 in only one regard – it allows embedding of arbitrary file formats (such as XML, CSV, CAD, word-processing documents, spreadsheet documents, and others) into PDF/A conforming documents.[15] PDF/A-4 Part 4 of the standard, based on PDF 2.0, is expected to be published in 2018.

Author:	Thomas Hoevel [ Tue Apr 03, 2018 2:40 pm ]
Post subject:	Re: PDF/A-3 in Version 1.5?
yboompook wrote: It has lot of obligation where in non PDF/A has optionable Thanks. The statement was "A list of tasks that must be tackled in PDFsharp for PDF/A would help to get us started." Which changes in PDFsharp are needed to produce PDF/A?

Author:	spindisc [ Wed Nov 20, 2019 8:38 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
Thomas Hoevel wrote: Hi! PDF/A is on the roadmap, but not yet for version 1.5. Trying to find release notes for 1.50 and 1.51 but I could not find any. Is PDF/A supported?

Author:	Thomas Hoevel [ Wed Nov 20, 2019 10:18 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
spindisc wrote: Is PDF/A supported? No. It was neither planned nor announced for 1.50 anyway.

Author:	anjac [ Fri Sep 03, 2021 10:03 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
Hi, are there news, can we now create PDF/A with pdfsharp? Have a ncie weekend.

Author:	rsowood [ Thu Nov 10, 2022 11:12 am ]
Post subject:	Re: PDF/A-3 in Version 1.5?
Any news on th esupport for A/3 , specfically I need to embed an XML document in a PDF

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