netcdf ref_tst_nul3 {
dimensions:
	n = 8 ;
variables:
	char cdata(n) ;
	char cdata2(n) ;

// global attributes:
		:global = "x\000y" ;
		:byte_att = 0b, 1b, 2b, 127b, -128b, -127b, -2b, -1b ;
data:

 cdata = "abc\000def" ;

 cdata2 = "\000\001\002\177\200\201\376\377" ;
}