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Old 02-13-2019, 04:40 AM   #1
grahamnaismith
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EPUB3 Validation Error - Assertion failed: package dcterms:modified meta element mu
[ERROR]content.opf: 3,152: assertion failed: package dcterms:modified meta element must occur exactly once

Getting this on IngramSpark and similar on http://validator.idpf.org and https://www.ebookit.com/tools/bp/Bo/...epub-validator

Line 3 is

<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuid_id" version="3.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlnspf="http://www.idpf.org/2007/opf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

I do have this in line 10

<dc:date>2019-02-14T00:00:00+00:00</dc:date>

and the below thread indicated to change it to <dcterms:modified> </dcterms:modified> but that doesn't work and returns a load of errors

https://www.mobileread.com/forums/sh...d.php?t=197051

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Old 02-13-2019, 03:41 PM   #2
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Old 02-13-2019, 04:21 PM   #3
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I'll move this to the EPUB forum where the bookmaking experts hang out

BR
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Old 02-13-2019, 04:39 PM   #4
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I'll move this to the EPUB forum where the bookmaking experts hang out

BR
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Old 02-13-2019, 04:51 PM   #5
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Quote:
Originally Posted by grahamnaismith View Post
[ERROR]content.opf: 3,152: assertion failed: package dcterms:modified meta element must occur exactly once

Getting this on IngramSpark and similar on http://validator.idpf.org and https://www.ebookit.com/tools/bp/Bo/...epub-validator

Line 3 is

<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="uuid_id" version="3.0">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlnspf="http://www.idpf.org/2007/opf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
Shouldn't you be looking at line 3152 and not line 3? Or is that line,column?
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Old 02-13-2019, 05:05 PM   #6
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Originally Posted by ilovejedd View Post
Shouldn't you be looking at line 3152 and not line 3? Or is that line,column?
Yes correct - it's line and column
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Old 02-13-2019, 05:15 PM   #7
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dc:date and dcterms:modified are not the same thing. The first is the publication date. The second is the date that the EPUB was last modified. You normally will have both. The proper syntax is:

<dc:date>2000-01-01T00:00:00Z</dc:date>

and

<meta property="dcterms:modified">2011-01-01T12:00:00Z</meta>
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Old 02-14-2019, 09:44 AM   #8
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Worked it out. Put the below in and it works. Thanks all

<dc:language>en</dc:language>
<meta property="dcterms:modified">2019-02-22T00:00:00Z</meta>
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