xmlschema(*args)
This method is equivalent to strftime(‘%FT%T%:z’). The optional argument n is the number of digits for fractional seconds.
DateTime.parse('2001-02-03T04:05:06.123456789+07:00').iso8601(9) #=> "2001-02-03T04:05:06.123456789+07:00"
static VALUE dt_lite_iso8601(int argc, VALUE *argv, VALUE self) { long n = 0; rb_check_arity(argc, 0, 1); if (argc >= 1) n = NUM2LONG(argv[0]); return rb_str_append(strftimev("%Y-%m-%d", self, set_tmx), iso8601_timediv(self, n)); }