Processing Maven properties

Sorry for a newbie question.

I've a jar file that cont开发者_运维知识库ains maven archetype. It goes with a bunch of java/resource files all of which having the following lines at the top

#set( $symbol_pound = '#' )
#set( $symbol_dollar = '$' )
#set( $symbol_escape = '\' )

These look like some preprocessor directives, but who really does process them? Is there some Maven command I need to run to get these files to valid state?

Those files are velocity files which are handled by the velocity Template system.

The Maven Command is the mvn archetype:generate ... to create from those archetypes real projects.