diff --git a/vitruvio-form-db-components.xsd b/vitruvio-form-db-components.xsd
index bc0f294..a508a8d 100644
--- a/vitruvio-form-db-components.xsd
+++ b/vitruvio-form-db-components.xsd
@@ -281,6 +281,18 @@
 				</xs:restriction>
 			</xs:simpleType>
 		</xs:attribute>
+		<xs:attribute name="type" use="optional">
+			<xs:simpleType>
+				<xs:restriction base="xs:string">
+					<xs:enumeration value="STRING" />
+					<xs:enumeration value="DECIMAL" />
+					<xs:enumeration value="NUMBER" />
+					<xs:enumeration value="BOOLEAN" />
+					<xs:enumeration value="DATE" />
+					<xs:enumeration value="TIMESTAMP" />
+				</xs:restriction>
+			</xs:simpleType>
+		</xs:attribute>
 	</xs:attributeGroup>
 
 	<xs:attributeGroup name="DBTableValueColumnBase">