epub:type not validating

apgoogh · 11-14-2021, 07:05 PM

I have an epub that I have added the epub:type. The epub as a whole validates but when I try to validate the individual xhtml files I get errors like

Attribute type from namespace http://www.idpf.org/2007/ops not allowed on XHTML element section at this point.

and

Attribute type from namespace http://www.idpf.org/2007/ops not allowed on XHTML element span at this point.

Sample code:
<html lang="en-GB" xml:lang="en-GB" xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops">
<head>
<meta charset="UTF-8" />
<title>Winning Stories</title>
<link rel="stylesheet" type="text/css" href="../Styles/THAB.css"/>
</head>

<body>
<section role="doc-part" epub:type="part" aria-labelledby="partwin">
<h1 id="partwin">WINNING STORIES</h1>

<a id="section_1"></a>
<section role="doc-chapter" epub:type="chapter" aria-labelledby="sigil_toc_id_1">
<h2 class="chapter" id="sigil_toc_id_1"><span id="page001" title="1" epub:type="pagebreak" role="doc-pagebreak"/>Story Title</h2>

The namespace is in the <html> tag. I cannot find a reason for attribute to be causing an error.

The epub package passes validation at https://epubcheck.mebooks.co.nz and runs clean in Ace by Daisy. It's W3C's markup validation service that individual files fail.

Any suggestions?

Thanks.

KevinH · 11-14-2021, 07:27 PM

Are you validating this file as xhtml or as html. Only in the former is the namespace defined?

Is this xhtml well-formed?

If your epub passes epubcheck, I would not worry about w3c validators for pure html.

apgoogh · 11-14-2021, 09:07 PM

I am uploading an xhtml file to the w3c validator.

The book does pass the epub check. It just makes no sense to me that the xhtml does not validate. Would this be a problem with the validator? or with the code? My use of the type attribute matches the recommendations in EPUB Accessibility Techniques 1.0 as well as in sample code I have found.

There is very little out there (read: google) on this error, so it makes me think there is something I am doing wrong.

apgoogh · 11-14-2021, 09:17 PM

I wonder if it has to do with html5. See article: http://codinginparadise.org/ebooks/h...ampaign=buffer

KevinH · 11-14-2021, 10:00 PM

No. "Tag soup" html is not xhtml. My guess is the w3c validator is only validating html (what the writer called tag soup) and is not an xhtml validator.

Again, I would not trust the w3c validator to validate real xhtml. If it passes epubcheck and is well-formed xhtml/xml then I think you are fine. A good way to check your xhtml is to load your epub into Sigil or Calibre's editor and look if Preview detects any not well-formed errors.

Doitsu · 11-15-2021, 09:03 AM

@apgoogh

EPUBCheck is better suited for your purposes.

Shameless plug: You might want to install my EPUBCheck Sigil plugin and validate your book with it.

11-14-2021, 07:05 PM	#1
apgoogh Junior Member Posts: 3 Karma: 10 Join Date: Nov 2021 Device: none	epub:type not validating I have an epub that I have added the epub:type. The epub as a whole validates but when I try to validate the individual xhtml files I get errors like Attribute type from namespace http://www.idpf.org/2007/ops not allowed on XHTML element section at this point. and Attribute type from namespace http://www.idpf.org/2007/ops not allowed on XHTML element span at this point. Sample code: <html lang="en-GB" xml:lang="en-GB" xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops"> <head> <meta charset="UTF-8" /> <title>Winning Stories</title> <link rel="stylesheet" type="text/css" href="../Styles/THAB.css"/> </head> <body> <section role="doc-part" epub:type="part" aria-labelledby="partwin"> <h1 id="partwin">WINNING STORIES</h1> <a id="section_1"></a> <section role="doc-chapter" epub:type="chapter" aria-labelledby="sigil_toc_id_1"> <h2 class="chapter" id="sigil_toc_id_1"><span id="page001" title="1" epub:type="pagebreak" role="doc-pagebreak"/>Story Title</h2> The namespace is in the <html> tag. I cannot find a reason for attribute to be causing an error. The epub package passes validation at https://epubcheck.mebooks.co.nz and runs clean in Ace by Daisy. It's W3C's markup validation service that individual files fail. Any suggestions? Thanks.

11-14-2021, 07:27 PM	#2
KevinH Sigil Developer Posts: 7,675 Karma: 5433388 Join Date: Nov 2009 Device: many	Are you validating this file as xhtml or as html. Only in the former is the namespace defined? Is this xhtml well-formed? If your epub passes epubcheck, I would not worry about w3c validators for pure html. Last edited by KevinH; 11-14-2021 at 07:37 PM.

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11-14-2021, 09:07 PM	#3
apgoogh Junior Member Posts: 3 Karma: 10 Join Date: Nov 2021 Device: none	I am uploading an xhtml file to the w3c validator. The book does pass the epub check. It just makes no sense to me that the xhtml does not validate. Would this be a problem with the validator? or with the code? My use of the type attribute matches the recommendations in EPUB Accessibility Techniques 1.0 as well as in sample code I have found. There is very little out there (read: google) on this error, so it makes me think there is something I am doing wrong.

11-14-2021, 09:17 PM	#4
apgoogh Junior Member Posts: 3 Karma: 10 Join Date: Nov 2021 Device: none	I wonder if it has to do with html5. See article: http://codinginparadise.org/ebooks/h...ampaign=buffer

11-14-2021, 10:00 PM	#5
KevinH Sigil Developer Posts: 7,675 Karma: 5433388 Join Date: Nov 2009 Device: many	No. "Tag soup" html is not xhtml. My guess is the w3c validator is only validating html (what the writer called tag soup) and is not an xhtml validator. Again, I would not trust the w3c validator to validate real xhtml. If it passes epubcheck and is well-formed xhtml/xml then I think you are fine. A good way to check your xhtml is to load your epub into Sigil or Calibre's editor and look if Preview detects any not well-formed errors.

11-15-2021, 09:03 AM	#6
Doitsu Grand Sorcerer Posts: 5,585 Karma: 22735033 Join Date: Dec 2010 Device: Kindle PW2	@apgoogh EPUBCheck is better suited for your purposes. Shameless plug: You might want to install my EPUBCheck Sigil plugin and validate your book with it.

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