Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/2518
@joshelser Thanks for your prompt answer. I didn't know that different
values can be stored with the same key but different visibility label
expression. The explanation 'The expression also contributes to the uniqueness
of that key, almost acting as a kind of "attribute" for the record being
store.' makes current design more understandable for me. If that is a part of
key for the value, then perfect matching one should be specified. I will
experiment it later. Thanks!
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