<xsd:attribute name="traverseXlinkDepth" type="xsd:string" use="optional">
    <xsd:annotation>
        <xsd:documentation>
                     This attribute indicates the depth to which nested property
                     XLink linking element locator attribute (href) XLinks are
                     traversed and resolved if possible.  A value of "1"
                     indicates that one linking element locator attribute
                     (href) Xlink will be traversed and the referenced element
                     returned if possible, but nested property XLink linking
                     element locator attribute (href) XLinks in the returned
                     element are not traversed.  A value of "*" indicates that
                     all nested property XLink linking element locator attribute
                     (href) XLinks will be traversed and the referenced elements
                     returned if possible.  The range of valid values for this
                     attribute consists of positive integers plus "*".
                     If this attribute is not specified then no xlinks shall be 
                     resolved and the value of traverseXlinkExpiry attribute (if
                     it specified) may be ignored.
                  </xsd:documentation>
    </xsd:annotation>
</xsd:attribute>