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

	char cdata2(n) ;

// global attributes:
	:global = "x\000y" ;
	:byte_att = '\000','\001','\002','\177','\200','\201','\376','\377';
data:

 cdata = "abc\000def" ;

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