--- title: istio.mixer.adapter.sample.quota layout: protoc-gen-docs number_of_entries: 6 ---
Duration is used inside templates for fields that are of ValueType “DURATION”
TimeStamp is used inside templates for fields that are of ValueType “TIMESTAMP”
Value is used inside templates for fields that have dynamic types. The actual datatype of the field depends on the datatype of the expression used in the operator configuration.