Comment by salawat

>Difficultly of network access from code running inside document. Allows PDFs to generally operate offline. Nobody's brave enough to try to write a single page application in a PDF.

You can absolutely do so. Most times however, the desire is to embed the latest cut of info into the PDF, then hand it off to somebody who will not have network access.

t. Been there, done that. Had the end product thrown out because of Adobe's licensing terms. I also met one of the people responsible for the tooling I had to suffer through. I have their address, but they apologized, and explained the internal politics at the time; so I've chilled on the whole crushing their genitalia with a large wrench bit.

Long story short: doable, but

  Do Not Follow. 
  This is not a place of honor. 
  No great deed was once commemorated here
  That which remains is repulsive to us, in our time, as it will be in yours. 

Seriously. If I could fill this post with spikes and sick faces, I would.

  Vvvvvvvvvvvvvvvvvvvvvvvvvvvvv
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

XFA was the dream of madmen, and sadists, that decent men thought they could wrangle some positive utility out of. They were wrong.

The trefoil is not an angel. The weird ring things are symbols for infectious waste.