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https://issues.apache.org/jira/browse/NIFI-3497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph Witt updated NIFI-3497:
------------------------------
    Status: Open  (was: Patch Available)

The patch has received a thorough review and needs some adjustments before it 
is reviewed again.  

> ScanAttribute should support tagging a flowfile with metadata value from the 
> supplied dictionary
> ------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-3497
>                 URL: https://issues.apache.org/jira/browse/NIFI-3497
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: Joseph Witt
>            Assignee: Joseph Witt
>
> Today ScanAttribute just looks through the supplied dictionary and given 
> object for a string matching hit.  If it hits then it is a match otherwise it 
> is a 'not found'.  However, when a hit occurs it can often be quite useful to 
> gather additional metadata about that hit.  This makes cases like 
> enrichment/tagging much easier.
> So, plan is to have ScanAttribute support a dictionary value demarcator which 
> would separate the dictionary term from some string response that will be 
> added to the flowfile.  For instance a dictionary might have
> apples:These are red or green
> bananas:These are yellow unless you should toss them or make bread
> Then if a hit occurs on 'apples' the flowfile that contained such an 
> attribute would have a new attribute such as 'dictionary.hit.term' = 'apple' 
> and 'dictionary.hit.metadata' = 'These are red or green'.
> This means downstream processors could extract that metadata and do 
> interesting things with it.



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