diff --git a/SDT/schema2.0/etc/domain.rnc b/SDT/schema2.0/etc/domain.rnc
index 01cb268a45c9b9ddf1412b9ebdb9dee465a768c0..d07da849b6d19dc29491c9662b7785bc88125639 100644
--- a/SDT/schema2.0/etc/domain.rnc
+++ b/SDT/schema2.0/etc/domain.rnc
@@ -54,6 +54,7 @@ DataType =
   | "time"
   | "datetime"
   | "blob"
+  | "uri"
 DocText =
   (text
    | element em { text }
diff --git a/SDT/schema2.0/src/domain.rng b/SDT/schema2.0/src/domain.rng
index 14ce218a69b88c360393e599dc47208da712594c..7af4a426ea65e94ddb3b1ad113b1ac804f5db311 100644
--- a/SDT/schema2.0/src/domain.rng
+++ b/SDT/schema2.0/src/domain.rng
@@ -130,6 +130,7 @@
 			<value>time</value>
 			<value>datetime</value>
 			<value>blob</value>
+			<value>uri</value>
 		</choice>
 	</define>
 
diff --git a/SDT/schema2.0/src/domain.xsd b/SDT/schema2.0/src/domain.xsd
index f22e199f0d00df437e885b502cc6f77f1fb57cc9..19114a80cf46fd6c170780a46de9e89a0835fa95 100644
--- a/SDT/schema2.0/src/domain.xsd
+++ b/SDT/schema2.0/src/domain.xsd
@@ -98,6 +98,7 @@
       <xs:enumeration value="time"/>
       <xs:enumeration value="datetime"/>
       <xs:enumeration value="blob"/>
+      <xs:enumeration value="uri"/>
     </xs:restriction>
   </xs:simpleType>
   <xs:group name="DocText">