nt system namespaces for each control plane.
Istio revisions and <code>discoverySelectors</code> are then used to scope the resources and workloads that are managed by each control plane.<div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.16/img/icons.svg#callout-warning"/></svg></div><div class=content>By default, Istio only uses <code>discoverySelectors</code> to scope workload endpoints. To enable full resource scoping, including configuration resources, the f