Clarify the goalPrefix (is there a default value for example) param

The doc for the goalPrefix param states:

The goal prefix that will appear before the ":".

I'm trying to understand if I need to define this parameter. It doesn't seem so based on my experience/tests as it will use some (most often good) default value. This should be clarified in the docs.

Maybe something like this (is this correct?):

If not defined, the default value depends on the artifactId name pattern of the plugin:

• maven-abc-plugin - default value of 'xxx'
• abc-maven-plugin - default value of 'xxx'
• abc-cde-fgh - default value of 'abc-cde-fgh'