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https://issues.apache.org/jira/browse/BEAM-91?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17132184#comment-17132184
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Beam JIRA Bot commented on BEAM-91:
-----------------------------------

This issue is P2 but has been unassigned without any comment for 60 days so it 
has been labeled "stale-P2". If this issue is still affecting you, we care! 
Please comment and remove the label. Otherwise, in 14 days the issue will be 
moved to P3.

Please see https://beam.apache.org/contribute/jira-priorities/ for a detailed 
explanation of what these priorities mean.


> Retractions
> -----------
>
>                 Key: BEAM-91
>                 URL: https://issues.apache.org/jira/browse/BEAM-91
>             Project: Beam
>          Issue Type: New Feature
>          Components: beam-model
>            Reporter: Tyler Akidau
>            Priority: P2
>              Labels: stale-P2
>   Original Estimate: 672h
>  Remaining Estimate: 672h
>
> We still haven't added retractions to Beam, even though they're a core part 
> of the model. We should document all the necessary aspects (uncombine, 
> reverting DoFn output with DoOvers, sink integration, source-level 
> retractions, etc), and then implement them.



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