That's not the PDF spec is it? That is a spec for Adobe Acrobat, which is not allowed to make any web requests thanks to my application firewall (Little Snitch).
Pretty sure a PDF opened in the browser can't run any JS, but not completely sure. So you're right: I don't really know it for a fact. Poor choice of words.
The spec is ISO 32000, and itβs expensive and closed, so difficult to reference. But according to Wikipedia at least, JavaScript is normative in it. No idea if SOAP / Web Services is part of it though.
Pretty sure a PDF opened in the browser can't run any JS, but not completely sure. So you're right: I don't really know it for a fact. Poor choice of words.