Updating PDF attributes

The PDFDocument class makes updating metadata attributes simple but appears to:

  1. Disallow arbitrary values for the /Producer attribute - the wite action substitutes an Apple string as the producer
  2. Offer no choice over the PDF version or the write format - it's 1.4, and compressed regardless of the original PDF format


Am I missing something simple in the PDFDocument class that will over-ride this behaviour?

Is the PDFDocument structure archive conformant and, if so, to what level?

Is it necessary to deal directly with CGPDFDocument to overcome these limitations?


cheers,

david

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enquora
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Observing similar behavior on iOS (even with 16 beta): https://stackoverflow.com/questions/72974880/how-to-specify-pdf-format-version-on-ios

Unfortunately it's preventing me from using XMP with PDFs in my app.

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ryanecrist
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