identifies the classification system in use, as defined by for example by a taxonomy element, or some other resource.  | 
                           
| Element | tei:classCode | 
<xs:attribute name="scheme" use="required" type="xs:anyURI"> <xs:annotation> <xs:documentation>identifies the classification system in use, as defined by for example by a taxonomy element, or some other resource.</xs:documentation> </xs:annotation> </xs:attribute>  |