PDF/A-3a attachment support query

[Rik Kabel <context@rik.users.panix.com>]

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Hello list,

The following document fails PDF/A-3a validation. It passes without the 
attachment.

    \setuplanguage       [en]
    \setuptagging        [state=start]
    \setupinteraction    [state=start]
    \setupbackend        [format={pdf/a-3a},profile={default_gray.icc},
                           intent={ISO coated v2 300\letterpercent\space
    (ECI)}]
    \setupstructure      [state=start,method=auto]
    \setupcolors         [pagecolormodel=auto,start=yes,rgb=no,cmyk=no]
    \setupbodyfont       [Palatino,10pt]
    \starttext

       Attaching a plain text file.

    % \attachment        [file=test.tex,
    %                     type={text/plain;charset=UTF-8}]
    % The \ConTeXt\ source code for this document is attached here.
       \attachment        [file=testa.pdf,
                           type={application/pdf}]
       A successfully validated pdf/a-3a file is attached here.

    \stoptext

pdf-online <https://www.pdf-online.com/osa/validate.aspx>reports:

    Validating file "test.pdf" for conformance level pdfa-3a
    The key F is required but missing.
    The appearance dictionary doesn't contain an entry.
    File specification 'testa.pdf' not associated with an object.
    The document does not conform to the requested standard.
    The document doesn't conform to the PDF reference (missing required
    entries, wrong value types, etc.).
    The document contains hidden, invisible, non-viewable or
    non-printable annotations.
    The document contains annotations or form fields with ambigous or
    without appropriate appearances.
    The document does not conform to the PDF/A-3a standard.
    Done.

My understanding is that 3-a should support both pdf and non-pdf 
attachments. This fails in a similar manner with both pdf/a-3a-validated 
files and with plain text files. I also tested with verapdf, and it also 
rejected the document with an attachment.

Is this my error, or is it not yet supported?

-- 
Rik Kabel



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