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https://issues.apache.org/jira/browse/UIMA-4165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14269576#comment-14269576
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Peter Klügl commented on UIMA-4165:
-----------------------------------
It's implemented for ruta-core (IDE still missing). You can give it a try if
you want. See NullExpressionTest for seom examples.
> UIMA Ruta new condition check null values in features
> -----------------------------------------------------
>
> Key: UIMA-4165
> URL: https://issues.apache.org/jira/browse/UIMA-4165
> Project: UIMA
> Issue Type: New Feature
> Components: ruta
> Affects Versions: 2.2.2ruta
> Reporter: Silvestre Losada
> Assignee: Peter Klügl
> Labels: condition, ruta
>
> Create a new condition that will be able to check in ruta script if a feature
> of given annotation is null. Something like this
> MyAnnotation.feature== NULL{-> ...}
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