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https://issues.apache.org/jira/browse/PDFBOX-1812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13871253#comment-13871253
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Guillaume Bailleul commented on PDFBOX-1812:
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Yes I had a look to the changes of PDFBOX-161.

In my opinion, there is no impact for PDF/A validation. Furthermore, there is 
no isartor test "not working" since that commit... I guess it is OK but I am 
not expert enough :-)

Nethertheless, it could be considered as candidate as it accept some bad 
formatted PDF. I am pretty sure there are some other cases of auto healing in 
PDFBox, we could put them in lenient modus when we (re)discover them.

> Illegal characters in XML output
> --------------------------------
>
>                 Key: PDFBOX-1812
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-1812
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Preflight
>    Affects Versions: 2.0.0
>         Environment: Bug reproduced under Win 7, Ubuntu
>            Reporter: Johan van der Knijff
>              Labels: characters, utf-8, xml
>             Fix For: 2.0.0
>
>         Attachments: 013814.pdf, 013814.xml, 013814_old.xml, 
> 1812-additionalPDFs09012014.zip, 598659.pdf, 598659.xml, 598659_old.xml, 
> 600111.pdf, 600111.xml, 600111_old.xml, preflight-app.jar
>
>
> When running Preflight in XML mode, the latest Preflight version (I used the 
> JAR from build #747) sometimes produces output that contains characters that 
> are illegal in XML. This can cause unexpected behavior if such files are 
> further processed with tools that expect well-formed XML.  See attached PDFs, 
> which all result in illegal characters in the description of a 1.0 Syntax 
> error, Error: Expected a long type. Output of older versions of Preflight 
> didn't contain these illegal characters; instead they would give something 
> like *actual='/O'*, *actual='Pages'*. etc. So I suppose this must have been 
> caused by a fairly recent change.
> See attachments below.



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