I don’t think it is possible. You can reuse “node” but not part of it.
given : Chris
family : Dumars
This is perfectly valid YAML and fields
family are reused in
ship-to block. You can reuse a scalar node the same way but there’s no way you can change what’s inside and add that last part of a path to it from inside YAML.
If repetition bother you that much I suggest to make your application aware of
root property and add it to every path that looks relative not absolute.