<xsd:attributeGroup id="attGp.hydrogenCountArray" name="hydrogenCountArray">
    <!-- Note: name differs from attributeGroup name -->
    <xsd:attribute id="att.hydrogenCountArray" name="hydrogenCount" type="hydrogenCountArrayType">
        <xsd:annotation>
            <xsd:documentation>
                <h:div class="summary" xmlns:h="http://www.w3.org/1999/xhtml">Array of hydrogenCounts.</h:div>
                <h:div class="description" xmlns:h="http://www.w3.org/1999/xhtml">Normally used in CML2 array mode. The total number of hydrogens bonded to the atom or molecule. It is preferable to include hydrogens explicitly, and where this is done their count represents the minimum (and may thus override this attribute). It is dangerous to use this attribute for electron-deficient molecules (e.g. diborane) or hydrogen bonds. There is NO DEFAULT and the absence of this attribute must not be given any meaning.</h:div>
            </xsd:documentation>
        </xsd:annotation>
    </xsd:attribute>
</xsd:attributeGroup>