<xsd:element name="definition" id="el.definition">
    <xsd:annotation>
        <xsd:documentation>
            <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">The definition for an entry.</h:div>
            <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">The definition should be a short nounal phrase defining the subject of the entry. Definitions should not include commentary, implementations, equations or formulae (unless the subject is one of these) or examples.
                <h:p>The definition can be in any markup language, but normally XHTML will be used, 
        perhaps with links to other XML namespaces such as CML for chemistry.</h:p>
            </h:div>
            <h:div class="example" href="definition1.xml" xmlns:h="http://www.w3.org/1999/xhtml">
                <h:em>From the IUPAC Dictionary of Medicinal Chemistry</h:em>
                <h:br />
            </h:div>
        </xsd:documentation>
    </xsd:annotation>
    <xsd:complexType mixed="true">
        <xsd:sequence minOccurs="0" maxOccurs="unbounded">
            <xsd:any processContents="lax" />
        </xsd:sequence>
    </xsd:complexType>
</xsd:element>