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http://jira.codehaus.org/browse/MNG-1957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_99983
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Tim Hedger commented on MNG-1957:
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VersionRange syntax doesn't support the ! negation syntax that the current
<jdk> tag allows.
Maximum reusability/simplicity here will be to use the existing VersionRange
syntax (as you mention Eric used for dependency versions), but for backwards
compatibility on <jdk> that would mean allowing ! to be used in dependency
versions. Is this OK?
> <jdk></jdk> clause in the activation section has to provide more complex
> expressions.
> -------------------------------------------------------------------------------------
>
> Key: MNG-1957
> URL: http://jira.codehaus.org/browse/MNG-1957
> Project: Maven 2
> Issue Type: Improvement
> Components: POM
> Affects Versions: 2.0, 2.0.1
> Reporter: Trustin Lee
> Fix For: 2.0.x
>
>
> For now, <jdk></jdk> provides only one operator '!' which means negation, but
> it would be great if i can use '+' and ~ operator:
> <jdk>1.5+</jdk> <!-- this will be activated when the current JDK version is
> 1.5 or above (e.g. 1.6) -->
> <jdk>1.1 ~ 1.4</jdk> <!-- this will be activated when the current JDK version
> is between 1.1 and 1.4 -->
> <jdk>~ 1.3</jdk> <!-- this will be activated when the current JDK version is
> 1.3 or below -->
> <jdk>1.4 ~</jdk. <!-- the same with 1.5+ -->
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