I am learning about the internals of the EPUB3 standard by writing my own transformation in XSLT2, using my thesis as an example text. Most of it is going excellently, but I am having some trouble understanding how the links between the toc.ncx and the documents are meant to work.
I am getting "ERROR: OEBPS/toc.ncx(25,47): 'd1e97': fragment identifier is not defined in 'OEBPS/index.xhtml'" (and others) from the online validator at ebookit.com for this:
21 <navPoint id="d1e97" playOrder="3">
22 <navLabel>
23 <text>Dedication</text>
24 </navLabel>
25 <content src="index.xhtml#d1e97"/>
26 </navPoint>
where index.xhtml says:
<div class="dedication" id="d1e97">
<p>To xxxx, yyyy, zzzz for their patience
and support.
</p>
</div>
Given that you are not allowed by EPUB3 to use <a name="..."> (the ebookit validator marks all occurrences of that as an error), what is the mechanism for the resolution of these links? What is the fragment identifier in line 25 supposed to point at? if not a name attribute on an <a> element, or an ID?