maven 2 - Setting velocity properties -

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i have occurence building maven archetype want 

#set( $controllerpackage = ${package}\.${artifactid})

i.e. set controllerpackage variable equal result of string concatentaion of following 3 elements ($package,'.',$artifactid)

however obvioulsy not correct syntax -

lexical error: org.apache.velocity.runtime.parser.tokenmgrerror: lexical error @ line 4, column 40. encountered: "." (46), after : "\"

is there way can include period in outputted string?

to construct string, use quotes.

#set( $controllerpackage = "${package}.${artifactid}" )

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