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https://issues.apache.org/jira/browse/MNG-6074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Osipov reopened MNG-6074:
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[~rfscholte], I consider this being a problem if not fixed when we want to
evolve the model to post {{4.0.0}}.
> Maven should produce an error if no model version has been set in a POM file
> used to build an effective model.
> --------------------------------------------------------------------------------------------------------------
>
> Key: MNG-6074
> URL: https://issues.apache.org/jira/browse/MNG-6074
> Project: Maven
> Issue Type: Improvement
> Reporter: Christian Schulte
> Priority: Critical
>
> Maven currently only validates the model version to equal {{4.0.0}} when set.
> The XML element is optional. Starting with Maven 3.4.0 a warning message
> should be printed whenever no model version has been set so that it becomes
> possible to use that version to decide about Maven behaviour. For example: In
> Maven 3.5 we could add support for a new model version {{4.1.0}} which may be
> used to decide about how Maven 3.5 should behave. Behaviour for model version
> {{4.0.0}} will be the same as in Maven 3.4. Behaviour for model version
> {{4.1.0}} could be different. For this the model version needs to be set.
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