diff --git a/schema/metaschema/metaschema-module-metaschema.xml b/schema/metaschema/metaschema-module-metaschema.xml
index c97e64d..c169b63 100644
--- a/schema/metaschema/metaschema-module-metaschema.xml
+++ b/schema/metaschema/metaschema-module-metaschema.xml
@@ -1042,6 +1042,7 @@
             <field ref="constraint-value-enum" min-occurs="1" max-occurs="unbounded">
                 <group-as name="enums" in-json="ARRAY"/>
             </field>
+            <field ref="constraint-message"/>
             <field ref="remarks"/>
         </model>
     </define-assembly>
@@ -1099,6 +1100,7 @@
             <assembly ref="property" max-occurs="unbounded">
                 <group-as name="props" in-json="ARRAY"/>
             </assembly>
+            <field ref="constraint-message"/>
             <field ref="remarks"/>
         </model>
     </define-assembly>
@@ -1152,6 +1154,7 @@
                 <use-name>key-field</use-name>
                 <group-as name="key-fields" in-json="ARRAY"/>
             </assembly>
+            <field ref="constraint-message"/>
             <field ref="remarks"/>
         </model>        
     </define-assembly>
@@ -1191,6 +1194,7 @@
                 <use-name>key-field</use-name>
                 <group-as name="key-fields" in-json="ARRAY"/>
             </assembly>
+            <field ref="constraint-message"/>
             <field ref="remarks"/>
         </model>        
     </define-assembly>
@@ -1213,6 +1217,7 @@
                 <use-name>key-field</use-name>
                 <group-as name="key-fields" in-json="ARRAY"/>
             </assembly>
+            <field ref="constraint-message"/>
             <field ref="remarks"/>
         </model>        
     </define-assembly>