diff --git a/ocaml/idl/datamodel.ml b/ocaml/idl/datamodel.ml
index bb179025c92..152283802f3 100644
--- a/ocaml/idl/datamodel.ml
+++ b/ocaml/idl/datamodel.ml
@@ -3231,7 +3231,12 @@ module VM_metrics = struct
             ~ty:Bool ~qualifier:DynamicRO
             "nomigrate" "VM is immobile and can't migrate between hosts"
             ~persist:false
-        ; field ~lifecycle:[Published, rel_jura, ""] ~default_value:(Some (VEnum "unspecified"))
+        ; field
+            ~lifecycle:[
+              Prototyped, rel_jura, "Not yet implemented (for future use)";
+              Published, rel_kolkata, "This field now contains valid data"
+            ]
+            ~default_value:(Some (VEnum "unspecified"))
             ~ty:Datamodel_vm.domain_type ~qualifier:DynamicRO
             "current_domain_type" "The current domain type of the VM (for running,\
              suspended, or paused VMs). The last-known domain type for halted VMs."
diff --git a/ocaml/idl/datamodel_vm.ml b/ocaml/idl/datamodel_vm.ml
index 3f142f9eef4..fd2126bc7c0 100644
--- a/ocaml/idl/datamodel_vm.ml
+++ b/ocaml/idl/datamodel_vm.ml
@@ -1394,7 +1394,12 @@ let set_HVM_boot_policy = call ~flags:[`Session]
            field ~qualifier:DynamicRO ~ty:Bool ~lifecycle:[Published, rel_ely, ""] ~default_value:(Some (VBool false))
              "requires_reboot" "Indicates whether a VM requires a reboot in order to update its configuration, e.g. its memory allocation.";
            field ~qualifier:StaticRO ~ty:String ~in_product_since:rel_ely ~default_value:(Some (VString "")) "reference_label" "Textual reference to the template used to create a VM. This can be used by clients in need of an immutable reference to the template since the latter's uuid and name_label may change, for example, after a package installation or upgrade.";
-           field ~qualifier:StaticRO ~ty:domain_type ~lifecycle:[Published, rel_jura, ""] ~default_value:(Some (VEnum "unspecified")) "domain_type" "The type of domain that will be created when the VM is started";
+           field ~qualifier:StaticRO ~ty:domain_type
+             ~lifecycle:[
+               Prototyped, rel_jura, "Internal-only field; not yet in the public API";
+               Published, rel_kolkata, "The field is now valid"
+             ]
+           ~default_value:(Some (VEnum "unspecified")) "domain_type" "The type of domain that will be created when the VM is started";
          ])
       ()