maven 2 archetype j2ee simple

[fl...@ingdirect.fr]

Hello
 
I'm new to maven 2 and I try to build a j2ee app with the
archetype:create goal.
 
Is the building of j2ee simple bugged?
 
I'am trying:
 
mvn archetype:create 
  -DgroupId=dg
  -DartifactId=dg
  -DarchetypeArtifactId=maven-archetype-j2ee-simple
 
When I look to the pom generated I see artefactID=projet and
groupID=root ??? and <module>site</module> but I cant' see any site
module in the tree?
 
And why this structure is so different than the example app of the book
better build with maven?
 
Thanks for the help
 
Florian
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