<xsd:element name="operator" id="el.operator">
    <xsd:annotation>
        <xsd:documentation>
            <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">An operator within an expression.</h:div>
            <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">Experimental. An operator acts on one or more arguments (at present the number is fixed by the type). The formulation is reverse Polish so the result (with its dataType) is put on a stack for further use.</h:div>
            <h:div class="example" href="potential1.xml" xmlns:h="http://www.w3.org/1999/xhtml" />
        </xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:sequence>
            <xsd:choice minOccurs="0" maxOccurs="unbounded" />
        </xsd:sequence>
        <xsd:attributeGroup ref="title" />
        <xsd:attributeGroup ref="id" />
        <xsd:attributeGroup ref="convention" />
        <xsd:attributeGroup ref="dictRef" />
        <xsd:attributeGroup ref="type" />
    </xsd:complexType>
</xsd:element>