We currently require that resource references to namespaced resource contains the namespace (i.e. config.kubernetes.io/depends-on: apps/namespaces/default/Deployment/wordpress-mysql). This can become a bit awkward if we have a set of resources that doesn't have the namespace set, but relies on it being resolved from the kube context. We could consider allowing the namespace to be omitted, but resolve it to the same namespace as the resource in which the annotation is set.