The apply
macro takes the name of a macro and invokes this macro with each element of the given list as an argument. It is useful when the arguments to the macro are in a comma separated list.
args = com.example.foo, 3.12, HIGHEST
${apply;repo;${args}}
This will be expanded to:
${repo;com.example.foo;3.12;HIGHEST}
Which will provide the path to the artifact