Reuters
Henry S. Thompson
XML Schema, London 1999-12-15
10
A simple example
n<!ELEMENT text (#PCDATA|emph|name)*>
n<!ATTLIST text
        timestamp NMTOKEN #REQUIRED>
n
n<element name="text">
n <type content="mixed">
n  <element ref="emph"/>
n  <element ref="name"/>
n  <attribute name="timestamp"
             type="date"
             minOccurs="1"/>
 </type>
</element>