{{- $url     := default "https://www.gutenberg.org/files/98/old/2city12p.pdf" (.Get "url"     | default (.Get 0)) -}}
{{- $title   := default "PDF Document"                                        (.Get "title"   | default (.Get 1)) -}}
{{- $caption := default (print $title " ([Download](" $url "))")              (.Get "caption" | default (.Get 2)) -}}

<portable-document title="{{ $title }}">
  <object type="application/pdf" data="{{ $url }}">
    <p>
      Your browser does not support a <code>PDF</code> (Portable Document Format)
      plugin. Here's a <a href="{{ $url }}">link to the PDF file</a> instead.
    </p>
  </object>
  <footer>{{ $caption | markdownify }}</footer>
</portable-document>