schemas/eeml/0.5.1.xsd in eeml-0.0.32 vs schemas/eeml/0.5.1.xsd in eeml-0.0.33

@@ -79,10 +79,10 @@
               </xsd:element>            
               <xsd:element minOccurs="1" maxOccurs="unbounded" name="data">
                 <xsd:complexType>
                   <xsd:sequence>
                     <xsd:element minOccurs="0" maxOccurs="unbounded" name="tag" type="xsd:string" />
-                    <xsd:element name="current_value">
+                    <xsd:element minOccurs="0" maxOccurs="1" name="current_value">
                       <xsd:complexType>
                         <xsd:simpleContent>
                           <xsd:extension base="xsd:string">
                             <xsd:attribute name="at" type="xsd:dateTime" use="optional" />
                           </xsd:extension>