Bixby Developer Center

Guides
References

to-role

optional

Signifies that the child is instantiating a role of the parent. For this to be possible, the parent has to be a primitive or a structure and the child has to define a role-of or extends relationship to that concept.

For more information, see Match Patterns.

Child Keys

any
optional
Use the wildcard underscore (_) to match any node, regardless of its type