question: public void delete ( String name ) throws IOException { if ( name . equalsIgnoreCase ( PERMITTED_SUBTREES ) ) { permitted = null ; } else if ( name . equalsIgnoreCase ( EXCLUDED_SUBTREES ) ) { excluded = null ; } else { throw new IOException ( "Attribute name not recognized by " + "CertAttrSet:NameConstraintsExtension." ) ; } encodeThis ( ) ; }
target:  Delete the attribute value.