<xsd:attributeGroup id="attGp.delimiter" name="delimiter">
    <xsd:attribute id="att.delimiter" name="delimiter" type="delimiterType">
        <xsd:annotation>
            <xsd:documentation>
                <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">A delimiter character for arrays and matrices.</h:div>
                <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">By default array components ('elements' in the non-XML sense) are whitespace-separated. This fails for components with embedded whitespace or missing completely:
        <h:pre>
        Example:
        In the protein database ' CA' and 'CA' are different atom types, and and array could be:
        &lt;array delimiter="/" dictRef="pdb:atomTypes"&gt;/ N/ CA/CA/ N/&lt;/array&gt; 
        </h:pre>
        Note that the array starts and ends with the delimiter, which must be chosen to avoid accidental use. There is currently no syntax for escaping delimiters.</h:div>
            </xsd:documentation>
        </xsd:annotation>
    </xsd:attribute>
</xsd:attributeGroup>