The dependencySet/includes/include format is documented incorrectly

The proper format for <include> elements should be:

groupId:artifactId:type:classifier[:version]

The documentation given by the maven-assembly-plugin says (incorrectly):

Artifact coordinatess may be given in simple groupId:artifactId form, or they may be fully qualified in the form groupId:artifactId:type:version[:classifier].

Additionally, the Sonatype book says (incorrectly? or maybe just confusingly):

groupId:artifactId:type[:classifier]:version - full artifact identity
If you need to get really specific, you can specify all the coordinates.