View source for PDF embedding | type attribute: type="application/pdf"

Some loose thoughts about PDF embedding.

((https://stackoverflow.com/questions/1244788/embed-vs-object <embed> vs. <object>))
((https://developer.mozilla.org/en-US/docs/Learn/HTML/Multimedia_and_embedding/Other_embedding_technologies#The_%3Cembed%3E_and_%3Cobject%3E_elements From object to iframe — other embedding technologies))
https://www.mediaevent.de/pdf-einbinden/

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/embed
%%(hl html)
<embed type="video/webm" src="/media/cc0-videos/flower.mp4" width="250" height="200" />
%%

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/object
%%(hl html)
<object type="application/pdf" data="/media/examples/In-CC0.pdf" width="250" height="200"></object>
%%

Attached files
  * ##~file:manual.pdf##

External files
  * ##~{{embed ...}}##
  * ##""<#  <embed  type="application/pdf" width="100%" height="450" src="https://example.com/file/global/manual.pdf"> #>""##

Questions:
  * Does the embed action also accept the WackoWiki ##file:## syntax?
    * add function to process ##file:## syntax 
  * Should we add the type attribute automatically, when we have the MIME type?
  * Should we add a parameter to embed a PDF via the ##file:## syntax, e.g. ##~file:manual.pdf?embed##
  * How  does the type attribute effects the PDF display in different browsers?

Work in Progress ...