bel names/values, for example, all namespaces with label <code>istio-discovery=enabled</code></li><li>A list of namespace labels using set-based selectors which carries OR semantics, for example, all namespaces with label <code>istio-discovery=enabled</code> OR <code>region=us-east1</code></li><li>Inclusion and/or exclusion of namespaces, for example, all namespaces with label istio-discovery=enabled AND label key <code>app</code> equal to <code>helloworld</code></li></ul><p>Note: <code>discoverySelectors</