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https://issues.apache.org/jira/browse/MNG-8537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Elliotte Rusty Harold reopened MNG-8537:
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That isn't how namespaces are supposed to work. Namespaces are not versions.
Adding and removing elements need not and should not change the namespace URI.
Ditto any other schema evolution.
> Maven 4 namespace should not change
> -----------------------------------
>
> Key: MNG-8537
> URL: https://issues.apache.org/jira/browse/MNG-8537
> Project: Maven
> Issue Type: Bug
> Reporter: Elliotte Rusty Harold
> Assignee: Guillaume Nodet
> Priority: Blocker
>
> Just noticed that Maven 4 has a new namespace URL. The old namespace was
>
> [http://maven.apache.org/POM/4.0.0]
>
> The new one is
>
> [http://maven.apache.org/POM/4.1.0]
>
> Putting version numbers in namespaces is a known XML antipattern because it
> makes it extremely difficult and inconvenient to write tools that process
> both, even when they are much the same. XSLT, DOM, XQuery, JDOM, etc. —
> really any XML aware tool — is going to have problems with this.
> Model version 4.1.0 is not a new and different schema that completely breaks
> with the past. Most old elements from 4.0.0 are still present and still mean
> exactly the same thing: groupId, artifactId, name, dependency, and most
> others. There are new elements but that doesn't imply a new namespace. Adding
> a new namespace is asserting that all the elements are different.
> IMHO Maven 4 should not change the namespace URL.
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