<xsd:simpleType name="tailType" id="st.tailType">
    <xsd:annotation>
        <xsd:documentation>
            <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">The tail linker in a polymeric repeat unit</h:div>
            <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">
                <h:p>A polymeric chain may be described by liniing the tail of one repeat
                unit to the head or tail of another. The tail attribute indicates the atom
                id (normally on an atom of elementType="R") which acts as the tail</h:p>
            </h:div>
            <h:div class="curation" xmlns:h="http://www.w3.org/1999/xhtml">2006-05-20: PMR added</h:div>
            <h:div class="example" href="tailType1.xml" xmlns:h="http://www.w3.org/1999/xhtml" />
        </xsd:documentation>
    </xsd:annotation>
    <xsd:restriction base="xsd:string">
        <xsd:pattern value="[A-z][A-z0-9_]*" />
    </xsd:restriction>
</xsd:simpleType>