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https://issues.apache.org/jira/browse/FOP-1814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16362147#comment-16362147
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simon steiner edited comment on FOP-1814 at 2/13/18 11:10 AM:
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Write a pdf compare tool that ignores the lines that are different such as id, 
date time.


was (Author: ssteiner1):
Write a pdf compare tool that ignores that lines that are different such as id, 
date time.

> Option to make PDF binary equal between runs (for Apache Forrest)
> -----------------------------------------------------------------
>
>                 Key: FOP-1814
>                 URL: https://issues.apache.org/jira/browse/FOP-1814
>             Project: FOP
>          Issue Type: Bug
>          Components: renderer/pdf
>    Affects Versions: trunk
>         Environment: Operating System: All
> Platform: All
>            Reporter: Jeremias Maerki
>
> FOP currently always creates a file ID in the PDF trailer even though it's 
> optional. It is required mostly be PDF/A and PDF/X. It may make sense to 
> disable the generation via a configuration item. We probably shouldn't 
> disable it by default because some people may rely on it by now.
> Second, the metadata date is always set to the current date even if it is 
> given in an XMP packet. That also prohibits binary equality.
> Adding this would allow Forrest to produce the same PDFs from run to run so 
> they don't cause SVN diffs all the time.



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