how to defined pom.xml scope variable?

[William wang]

hi:
in ant build.xml we can define a variable refer in furture like this:

<property name="JBoss.home" value="C:/jboss-3.2.3"/>

refer like this:

<property name="JBoss.3.x+.Client.home" value="${JBoss.home}/client"/>

but in maven 2.x pom.xml ,how to define a similar pom variable refer in
furture?


thanks.