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NCX Doctype in EPUB 3 is causing an ERROR #591

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tofi86 opened this issue Sep 9, 2015 · 2 comments
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NCX Doctype in EPUB 3 is causing an ERROR #591

tofi86 opened this issue Sep 9, 2015 · 2 comments
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type: not an issue The issue is rejected (not an actual issue or not relevant)

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@tofi86
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tofi86 commented Sep 9, 2015 

Validating using EPUB version 3.0.1 rules.

ERROR (OPF-073) at "dpi-test_EPUB3.epub/OEBPS/toc.ncx" (line 2, col 100):
   External identifiers must not appear in the document type declaration.

epubcheck 4.0.0 throws this ERROR when having a toc.ncx file with a DOCTYPE declaration for backwards compatibility in an EPUB 3 book:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ncx PUBLIC "-//NISO//DTD ncx 2005-1//EN" "http://www.daisy.org/z3986/2005/ncx-2005-1.dtd">
<ncx xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops"
...

removing the doctype fixes the error, but why is the DOCTYPE forbidden?
@rdeltour
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rdeltour commented Sep 9, 2015

why is the DOCTYPE forbidden?

This comes from XML Conformance criteria in the Publications spec:

External identifiers must not appear in the document type declaration.

@rdeltour rdeltour added the type: not an issue The issue is rejected (not an actual issue or not relevant) label Sep 9, 2015
@rdeltour rdeltour closed this as completed Sep 9, 2015
@tofi86
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tofi86 commented Sep 9, 2015

Okay, thanks...

@JackieFei JackieFei mentioned this issue Nov 8, 2016
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@tofi86 @rdeltour