tly to a specific Istio control plane deployment.</p><p>With revision tags, there’s now a layer of indirection: you can create tags like <code>canary</code> and <code>prod</code>, label namespaces using those tags as revisions (i.e. <code>istio.io/rev=prod</code>), and associate a specific Istiod revision with that tag.</p><p>For example, imagine you have two revisions, <code>1-7-6</code> and <code>1-8-0</code>. You create a revision tag <code>prod</code> pointed to revision <code>1-7-6</code> and create 