The characterization of the PDF format specifically being “basically code” in any substantial manner is simply incorrect. The only PDF-specific features that reasonably meet that description is the PostScript support, which has fallen out of use decades ago and was completely removed in PDF 2.0, and the JavaScript support, which is optional, prohibited in PDF/A, and can easily be limited or omitted by a PDF viewer.

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jwilk 6 hours ago | parent [-]

> the PostScript support

What do you mean by that?

	▲	0x457 4 hours ago \| parent [-]
		Older PDFs support PostScript XObjects: literal embedded PostScript code. Not sure it counts tho, because IIRC it was never executed by PDF viewer itself. It was "gives this to printer when printing"