Update: There is a website where you can upload a PDF file and test it against various PDF standards. I generated a PDF using my customer's Pega 7.2 system and tested it in this way, and received the following report (below). Basically, the Pega 7.2 PDF is not acceptable PDF/A format.
Unfortunately, my customer is a government agency in the Netherlands, and they mandate a PDF/A file as a requirement.
Does anybody know how to make Pega generate PDF/A?
Validating file "Testfile01.pdf" for conformance level pdfa-1a
The key Metadata is required but missing.
The key StructTreeRoot is required but missing.
A device-specific color space (DeviceRGB) without an appropriate output intent is used.
The value of the key CA is 0 but must be 1.0. (2)
The value of the key ca is 0 but must be 1.0. (2)
The key S has a value Transparency which is prohibited. (2)
The font Helvetica must be embedded.
The font Helvetica-Oblique must be embedded.
The font Helvetica-Bold must be embedded.
The document does not conform to the requested standard.
The document contains device-specific color spaces.
The document contains fonts without embedded font programs or encoding information (CMAPs).
The document contains transparency.
The document's meta data is either missing or inconsistent or corrupt.
The document doesn't provide appropriate logical structure information.
I shall mark this thread as 'Answered' although the answer is incomplete. Setting the parameter pyPDFGeneratePDFA to "true" when calling the HTMLtoPDF activity results in a PDF file that is more or less in PDF/A format, at least AlFresco reports the file as being in PDF/A; however when using the PDF test website to check the file for PDF/A running the file it produces the errors as shown in Jeroen's post above. So it is not completely PDF/A.