/li><li>Services in &ldquo;abc&rdquo; namespace.</li></ul><pre><code class=language-yaml>apiVersion: &quot;rbac.istio.io/v1alpha1&quot;
kind: ServiceRoleBinding
metadata:
  name: test-binding-products
  namespace: default
spec:
  subjects:
  - user: alice@yahoo.com
  - properties:
      source.namespace: &quot;abc&quot;
  roleRef:
    kind: ServiceRole
    name: &quot;products-viewer&quot;
</code></pre><h2 id=AccessRule>AccessRule</h2><section><p>AccessRule defines a permission to access a list of services.