* '''CPC_SUBCLASS'''
** XML 4.35 utility, 4.4, 4.5reissue types
*** <code>//us-bibliographic-data-grant/classifications-cpc/main-cpc/classification-cpc/section</code> + <code>//us-bibliographic-data-grant/classifications-cpc/main-cpc/classification-cpc/class</code> + <code>//us-bibliographic-data-grant/classifications-cpc/main-cpc/classification-cpc/subclass</code>
** APS