Master table name for objectclas field....

we are upgrading from 4.6c to ECC

in 4.6C an zreport for change document details checks the objectclas field directly using the hardcoded values (ex: f_objclass = 'ADRESSE' , f_objclass = 'KRED'.etc)...

now i wan to know whether the same objectclas values will be used in ECC also or is there is any change with 4.6C...

can anybody tell me the master table name which contains the value of objectclas and coresspoding T.code.so that i will compare them in 4.6c with ECC