v1.6/docs/reference/config/policy-and-telemetry/expression-language/>Expression Language</a></h5><p>Mixer configuration expression language reference.</p></div><div class=entry><h5><a href=/v1.6/docs/reference/config/policy-and-telemetry/adapters/>Mixer Adapters (Deprecated)</a></h5><p>Mixer adapters allow Istio to interface to a variety of infrastructure backends for such things as metrics and logs.</p></div><div class=entry title="3 minute read"><h5><a href=/v1.6/docs/reference/config/policy-and-telemetry