Update schema

Author: Zeyu Shen

xsd/instruments.xsd

@@ -845,7 +845,15 @@
       <xs:element name="Notionals">
         <xs:complexType>
           <xs:sequence>
-            <xs:element type="xs:float" name="Notional" maxOccurs="unbounded"/>
+            <xs:element name="Notional" maxOccurs="unbounded">
+              <xs:complexType>
+                <xs:simpleContent>
+                  <xs:extension base="xs:float">
+                    <xs:attribute name="startDate" type="xs:string" />
+                  </xs:extension>
+                </xs:simpleContent>
+              </xs:complexType>
+            </xs:element>
             <xs:element type="fxreset" name="FXReset" minOccurs="0" maxOccurs="unbounded"/>
             <xs:element type="exchanges" name="Exchanges" minOccurs="0" maxOccurs="1"/>
           </xs:sequence>