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https://issues.apache.org/jira/browse/MRESOLVER-334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17807369#comment-17807369
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ASF GitHub Bot commented on MRESOLVER-334:
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cstamas merged PR #486:
URL: https://github.com/apache/maven-site/pull/486
> Maven Resolver's GenericVersionScheme diverges from the spec
> ------------------------------------------------------------
>
> Key: MRESOLVER-334
> URL: https://issues.apache.org/jira/browse/MRESOLVER-334
> Project: Maven Resolver
> Issue Type: Bug
> Components: Resolver
> Affects Versions: 1.9.5
> Reporter: David M. Lloyd
> Assignee: Tamas Cservenak
> Priority: Major
> Fix For: 2.0.0, 2.0.0-alpha-7
>
>
> The [specification for version
> resolution|https://maven.apache.org/pom.html#version-order-specification]
> indicates these facts which disagree with the implementation in
> {{{}GenericVersionScheme{}}}:
> * "The Maven coordinate is split in tokens between dots ('{{{}.{}}}'),
> hyphens ('{{{}-{}}}') and transitions between digits and characters." - in
> {{{}GenericVersion{}}}, the underscore ('{{{}_{}}}') is also treated as a
> separator.
> * In the examples area, it says that while "{{{}1-sp.1{}}}" {{>}}
> "{{{}1-ga.1{}}}", at the same time "{{{}1-sp-1{}}}" {{<}} "{{{}1-ga-1{}}}"
> {{=}} "{{{}1-1{}}}" due to "trailing 'null' values at each hyphen". But in
> addition to being untrue in the actual implementation, this relation is
> clearly nonsensical because it would place {{sp}} before {{{}ga{}}}, which
> would have a tremendous negative impact on the existing artifact ecosystem if
> it were carried out in the implementation.
> * Also in the example area, we have "{{{}1.foo{}}}" {{=}} "{{{}1-foo{}}}"
> {{<}} "{{{}1-1{}}}" {{<}} "{{{}1.1{}}}", whereas in practice it is (rightly)
> "{{{}1.foo{}}}" {{=}} "{{{}1-foo{}}}" {{<}} "{{{}1-1{}}}" {{=}} "{{{}1.1{}}}".
> In my opinion all of these things are spec errors so I'd be happy to see the
> spec page be updated and this bug consequently closed as "out of date",
> especially since the implementation behavior has been in the wild for some
> time.
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