Deployment Policy Variable Usage

[kgund002]

I need help with using deployment policy variables. Below is how I'm using it. Can someone comment on the usage?

Properties for the ucdDemo service.
import-from-def target
import.file=${user.dir}/${service}/${service}.zip

Deployment Policy Object for import-dpo
deployment.policy.object=dep_pol_${service}

Deployment Policy Object Variable for import-dpo
deployment.policy.object.variables=dep-pol_variables