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https://issues.apache.org/jira/browse/NIFI-1670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16132157#comment-16132157
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ASF GitHub Bot commented on NIFI-1670:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/nifi/pull/2097
> Expression Language documentation should be clarified for isEmpty and
> allAttributes
> -----------------------------------------------------------------------------------
>
> Key: NIFI-1670
> URL: https://issues.apache.org/jira/browse/NIFI-1670
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Documentation & Website
> Affects Versions: 0.6.0
> Reporter: Andy LoPresto
> Assignee: Pierre Villard
> Priority: Minor
> Labels: documentation, expression-language
>
> The documentation for {{isEmpty}} and {{allAttributes}} should be reviewed
> for correctness and clarity as pointed out by a member of the mailing list.
> From the mailing list:
> From: Paul Nahay <pna...@sprynet.com>
> Subject: Errors in your Documentation
> Date: March 22, 2016 at 5:52:10 AM PDT
> To: d...@nifi.apache.org
> Cc: Jonathan Wood <jkwoo...@gmail.com>
> Reply-To: d...@nifi.apache.org
> Reply-To: Paul Nahay <pna...@sprynet.com>
> I'm looking at:
> https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html
> isEmpty
> Description: The isEmpty function returns true if the Subject is null or
> contains only white-space (new line, carriage return, space, tab), false
> otherwise.
> This logically implies that isEmpty returns FALSE if the Subject contains NO
> CHARACTERS AT ALL (not even white-space). This makes no sense at all.
> allAttributes
> Description: Checks to see if any of the given attributes, match the given
> condition.
> Hopefully you actually mean "all", not "any".
> What's funny here is that THESE TWO functions were the ones I initially
> needed, and your documentation has errors for BOTH of them. I'll expect then
> to find more errors in your documentation, and will report them to you as I
> find them.
> Feedback confirming the errors will be appreciated.
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