Is chflags' "nodump + sunlnk" = "uchg"

[Charles Darwin]

On 12-Nov-08, at 6:43 PM, Dan Nelson wrote:

> In the last episode (Nov 12), Charles Darwin said:
>> Hi all,
>>
>> Title is the question actually:  Is chflags' "nodump + sunlnk" =  
>> "uchg"
>
> No; why would it be?

I mean as far as their effect on a directory; doesn't "Don't change"  
for a directory mean "Don't add + Don't remove"?

Charles