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https://issues.apache.org/jira/browse/PDFBOX-4970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pierrick Vandenbroucke updated PDFBOX-4970:
-------------------------------------------
    Description: 
We are trying to detect files which contain several objects with the same 
identifier within a revision or in a given PDF. Currently, that seems not 
possible. We are facing to this 
[map|https://github.com/apache/pdfbox/blob/2.0.21/pdfbox/src/main/java/org/apache/pdfbox/cos/COSDocument.java#L56]
 which only allows one instance by object id. The map usage brings limitations 
(eg : rendering,...).

Is that possible to detect such files ?

  was:
We are trying to detect files which contain several objects with the same 
identifier within a revision or in a given PDF. Currently, that seems not 
possible. We are facing to this [map|#L56] which only allows one instance by 
object id. The map usage brings limitations (eg : rendering,...).

Is that possible to detect such files ?


> Possibility to detect duplicate ids in a revision
> -------------------------------------------------
>
>                 Key: PDFBOX-4970
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4970
>             Project: PDFBox
>          Issue Type: Improvement
>            Reporter: Pierrick Vandenbroucke
>            Priority: Major
>
> We are trying to detect files which contain several objects with the same 
> identifier within a revision or in a given PDF. Currently, that seems not 
> possible. We are facing to this 
> [map|https://github.com/apache/pdfbox/blob/2.0.21/pdfbox/src/main/java/org/apache/pdfbox/cos/COSDocument.java#L56]
>  which only allows one instance by object id. The map usage brings 
> limitations (eg : rendering,...).
> Is that possible to detect such files ?



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