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The conformance checker for EPUB publications

Results 194 epubcheck issues
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I created an epub file which validated in epubcheck 4.2.6 with no errors. Now I'm trying to validate it with the  command line tool of the latest epubcheck 5.0.0 for...

type: spec
status: in discussion
spec: EPUB 3.x

- Used the correct German quotes `„` and `“` in UTF-8 encoded properties files. - Used the correct German quotes `\u201e` and `\u201c` in ISO-8859-1 encoded properties files. - Fixed...

@rdeltour The EPUB validation has failed while using the option "--version" in the command line argument and getting the default message in the log file if there are any errors...

status: waiting for feedback
priority: low
type: regression

Non-standard entities, for example &linkref; are not reported when the checked file is EPUB2. In EPUB3 such entities are reported as errors. Is there a certain reason for this behavior?

status: waiting for feedback
type: unverified

I've encountered this error and created a stripped-down version of the original EPUB that still exhibits the error: [invalidUtf8Sequence.epub](http://devel.springer.de/invalidUtf8Sequence.epub) For this file, EPUBCheck v5.1.0 reports ``` Validating using EPUB version...

type: bug
status: needs review

I noticed while testing that Creation Date is no longer populated in the report. Is this a permanent change? When I looked at the code, I saw this is commented...

status: accepted
type: regression

For checking the contents of an EPUB, a `java.util.zip.ZipFile`-object is created. This opens the file for introspection. The file can be closed in two different ways: By explicitly being closed...

Hi, When I check a fixed layout epub using the EpubCheck 5.0.1 or EpubCheck 5.1.0, I get the following. No errors on EpubCheck 5.0.0 and earlier versions. OPF file is...

type: bug
status: accepted

_From [[email protected]](https://code.google.com/u/116904555323702666006/) on December 22, 2011 11:31:34_ Add validation of CFI links: a) syntactical validity b) resolve _Original issue: http://code.google.com/p/epubcheck/issues/detail?id=150_

status: needs review
priority: low
spec: EPUB 3.x

I observed the following 1. The use of `ResourceBundle.Control` with the Java Platform Module System (jpms) is not possible. In Java >=9 the following method is present in `ResourceBundle`: ```java...