Currently, we have the current format for service discovery and property expansion:

my_service=knative:my_namespace/my_function

This prevents users from adding a path to the url of the service.

my_service=knative:my_namespace/my_function/path <- This don't work because "/path" shouldn't be part of the discovery.

So, we need to change it for the following format:
my_service=${knative:my_namespace/my_function}/path