Requirement: Need to check out source code from a different layer as part of an
axis such as DEV/TEST. DEV or TEST are checked out from different development
labels and built and appropriately.

Example:

jdk=JDK1.4, JDK1.5, JDK1.6
db=ORACLE, MYSQL
enviro=DEV, TEST

Problem: Passing of parameters such as -Denviro=DEV can be passed to maven/ant
but cannot be passed to the source control checkout.

Possible Solution: Provide escaping/substitution such as ${enviro} to all
fields before proceeding with execution of the build. This would allow
${enviro} to be passed to version control and check out appropriate sources.

I only really need this for version control but others may require a more
general configuration of requirements.