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https://issues.apache.org/jira/browse/JEXL-264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16585673#comment-16585673
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Dmitri Blinov commented on JEXL-264:
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Created separate PR for this[https://github.com/apache/commons-jexl/pull/6]
> Allow space, quote & double-quote in identifiers
> ------------------------------------------------
>
> Key: JEXL-264
> URL: https://issues.apache.org/jira/browse/JEXL-264
> Project: Commons JEXL
> Issue Type: Improvement
> Affects Versions: 3.1
> Reporter: Henri Biestro
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.2
>
>
> Since a Jexl context may be backed by a map that is not under Jexl's control,
> it may happen that keys in such a map contains spaces (quotes, backquotes).
> Scripting these top-level variables is then not very easy; adding an escaping
> mechanism in the syntax for top-level identifiers is provably convenient in
> this case.
> For example:In a script, {code}My\ Variable = 3{code} sets the top level
> variable keyed with the string "My Variable" with the value 3.
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