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https://issues.apache.org/jira/browse/PDFBOX-5884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Lehmkühler closed PDFBOX-5884.
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> Support OCG visibility expressions
> ----------------------------------
>
>                 Key: PDFBOX-5884
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5884
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Rendering
>    Affects Versions: 2.0.32, 3.0.3 PDFBox
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>            Priority: Minor
>              Labels: OCGs
>             Fix For: 2.0.33, 3.0.4 PDFBox, 4.0.0
>
>         Attachments: gs-bugzilla707999-OCG.pdf
>
>
> PDF specification about the /VE array in an Optional Content Membership 
> Dictionary: "An array specifying a visibility expression, used to compute 
> visibility of content based on a set of optional content groups". I found a 
> single example in a recent issue in the ghostscript project.



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