The ${pom.versions} List behaves differently when running plugins under maven 
1.1 and maven 1.0
-----------------------------------------------------------------------------------------------

         Key: MAVEN-1688
         URL: http://jira.codehaus.org/browse/MAVEN-1688
     Project: Maven
        Type: Bug
  Components: core  
    Versions: 1.1-beta-2    
 Reporter: Henning Schmiedehausen


Consider the following POM snipped:

<versions>
    <version>
      <name>2.1</name>
      <tag>TURBINE_2_1</tag>
    </version>
    <version>
      <name>2.2</name>
      <tag>TURBINE_2_2_0</tag>
    </version>
    <version>
      <name>2.3-rc1</name>
      <tag>TURBINE_2_3_RC1</tag>
    </version>
    <version>
      <name>2.3-rc2</name>
      <tag>TURBINE_2_3_RC2</tag>
    </version>
    <version>
      <name>2.3</name>
      <tag>TURBINE_2_3</tag>
    </version>
    <version>
      <name>2.3.1-RC1</name>
      <tag>TURBINE_2_3_1_RC1</tag>
    </version>
    <version>
      <name>2.3.1-RC2</name>
      <tag>TURBINE_2_3_1_RC2</tag>
    </version>
    <version>
      <name>2.3.1</name>
      <tag>TURBINE_2_3_1</tag>
      <id>2.3.1</id>
    </version>
    <version>
      <name>2.3.2-RC1</name>
      <tag>TURBINE_2_3_2_RC1</tag>
    </version>
  </versions>

echoing ${pom.versions} under the 1.0.2 maven release issues the following 
output:

    [echo] [2.1, 2.2, 2.3-rc1, 2.3-rc2, 2.3, 2.3.1-RC1, 2.3.1-RC2, 2.3.1, 
2.3.2-RC1]

doing the same thing under the 1.1-beta 2 core results in

    [echo] [null, null, null, null, null, null, null, 2.3.1, null]

It seems that 1.0 uses the name as key and 1.1 uses the id. This causes e.g. 
the clirr plugin to fail if a project
defines names for a version entry but no id.

If it is necessary that a version entry contains name and/or id, it should be 
enforced by the maven core and bad
entries should be reported.

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