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https://issues.apache.org/jira/browse/ACCUMULO-241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179917#comment-13179917
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Keith Turner commented on ACCUMULO-241:
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I like the idea of quoting. We keep the current white list. If the user wants
to use something outside of that list, they have to quote it. For example if a
user wanted to use the label foo.bar, then they would need to do 'foo.bar'. I
think this has the following benefits:
* backwards compatible with existing data
* allows users to use whatever characters they like in their labels
* give us the flexibility to use additional characters in the language in the
future
* is human readable
Would just need an escape mechanism for quote, could do the standard two quotes.
One drawback I can think of is that users can make labels that look like
expressions, like 'A&B'. This is the type of thing that a computer has no
issues with, but it may mislead a person.
> Visibility labels should blacklist non-ASCII characters instead of
> whitelisting select ASCII characters
> -------------------------------------------------------------------------------------------------------
>
> Key: ACCUMULO-241
> URL: https://issues.apache.org/jira/browse/ACCUMULO-241
> Project: Accumulo
> Issue Type: Improvement
> Affects Versions: 1.3.5
> Reporter: John Vines
> Labels: visibility
> Fix For: 1.3.6
>
>
> We currently whitelist our visibility labels to only allow alphanumerics and
> a few select delimiting characters. While we strive for human-readable
> labels, we should instead utilize a blacklist approach where we disallow
> parentheses, ampersands, pipes, and any non-ASCII characters. This will
> provide users with more flexibility in labeling, while still sticking to
> human readability.
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