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From Jörg Schaible <>
Subject Re: [ALL] Specification version
Date Fri, 18 Jun 2010 14:48:45 GMT
Emmanuel Bourg wrote:

> Le 18/06/2010 12:57, Jörg Schaible a écrit :
>> since Sebb is going to modify the parent pom, I want also have your
>> opinion about the current values of the Specification-Version in the
>> manifests. Currently Maven generates uses the current version of the
>> artifact for "Specification-Version" and "Implementation-Version"
>> i.e."<Major>.<Minor>- SNAPSHOT" in case of a snapshot or "<Major.Minor>"
>> for the standard release. However, in case of a bugfix release, this
>> version is "<Major>.<Minor>.<Patch>". The ideal situation would
>> that we have the "Specification-Version" always using "<Major>.<Minor>"
>> while the "Implementation-Version" should stay the exact version that
>> Maven is using.
> Just out of curiosity, what's the benefit of doing this beside saving 2
> bytes on the final jar ? Is it relevant for the Commons components since
> we aren't defining/implementing standard APIs anyway ?

It is simply an expression of our policy to keep a major.minor version 
binary compatible.

> If we really want to care about these fields and follow the Sun rules
> rigorously, then the patch number should probably be preceded by an
> underscore instead of a dot:

See the spec of the manifest, it only requires both version fields to be a 

- Jörg

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