EPUB3 Readers Do Not Display Embedded (i.e. Print Edition) Page Numbers

[Hopkins1]

Summary:

E-book readers that support viewing epub3 embedded page numbers are not working. The page numbers are not displayed. This appears to be due to the toc.xhtml page list using epub:type="landmarks" rather than epub:type="page-list".

Other minor page number accessibility features could be implemented in the epub3 file.

How to Reproduce:

Calibre E-book viewer
Action: Set Preferences|Headers and footers|Footer Middle to "Pages from paper edition"
Result: Print page numbers are not displayed in footer

Mac Books app
Action: Set View|Print Edition Page Numbers
Result: Setting is not available (grayed out)

Kindle Paperwhite (via Send to Kindle)
Action: Set Aa|More tab|Reading Progress|Page in book
Result: Cycling through progress indicator in lower left of page will eventually show "Page xx", but xx does not match the epub numbers

Suggested Changes:

Specification link
Example link

toc.xhtml changes (using pg77076):

current:

```<nav epub:type="landmarks" aria-label="Page List">
  <ol id="pages" class="pagelist">

    <li>
      <a href="7087579753225567587_77076-h-7.htm.xhtml#Page_xiii" id="pt-5" epub:type="frontmatter">[Pg xiii]</a>
    </li>
    <li>
      <a href="7087579753225567587_77076-h-8.htm.xhtml#Page_1" id="pt-6" epub:type="normal">[Pg 1]</a>
    </li>

updated:

    ```</nav>
    <nav epub:type="page-list" hidden="hidden">
      <ol id="pages" class="pagelist">

        <li>
          <a href="7087579753225567587_77076-h-7.htm.xhtml#Page_xiii" id="pt-5">xiii</a>
        </li>
        <li>
          <a href="7087579753225567587_77076-h-8.htm.xhtml#Page_1" id="pt-6">1</a>
        </li>

Note: "[Pg ]" text stripped out since Kindle only works with Roman and Arabic numbers.

Other minor changes for accessibility:

1. Some assistive readers (e.g. Thorium Reader, NVDA) can read out the contents of the title attribute value and/or arial-label value in the page markers if epub:type="pagebreak" and role="doc-pagebreak" are used.

Specification link

Example:

<span epub:type="pagebreak" role="doc-pagebreak" id="Page_47" title="47"/>

Notes:

Only the bare page number is recommended with the "doc-pagebreak" role: document

Also may need to add xmlns:epub="http://www.idpf.org/2007/ops" to support the epub namespace.

2. Page accessibility could be noted by adding "pageNavigation" to the content.opf file meta data.

Specification link

Example:

<meta property="schema:accessibilityFeature">pageNavigation</meta>

Thorium Reader will display "Navigation - Go to page" in the E-book info page"