impl xs models impl xs SubstitutionGroupHandler impl xs XMLSchemaException xni QName xscmvalidator first_error subsequent_error startcontentmodel onetransition qname elementname substitutiongrouphandler subgrouphandler endcontentmodel checkuniqueparticleattribution substitutiongrouphandler subgrouphandler xmlschemaexception whatcangohere occurenceinfo gettermname termid iscompactedforupa