how to declare a field in a structure and table

Hi, I have a doubt in declaring a field inside a structure.

types: BEGIN OF mrm_rbkpv.

INCLUDE STRUCTURE rbkp_v.

types: h_rbws LIKE rbws OCCURS 0,

end of mrm_rbkpv.

data : e_rbkp_v type mrm_rbkpv.

Now I want I to refer to field WT_WITHCD inside table H_RBWS.

eg : if e_ebkp_v-h_rbws-wt_withcd = 'X ' is right or wrong??????

POints will rewarded

Thanks in advance