If I understand what you're asking correctly, the following might help
You can define the value of a property in terms of the value of another although it would be best to just have the one.
So I if I have a property propA with a value of "XYZ" and i want another property propB to have the same value then I could define the value for propB as ${p:propA} but it does depend on whether propB would have visibility of probA.
If possible it might just be better to move propA higher in the resource tree so that it is visible to both consumers.
Sorry this is a bit generic but its difficult to be more specific with the information provided
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