Question : Formula question

I have a formula on  field on a form.

Can anyone tell me what this formula may mean ?

S1:= @If(@ClientType = "Web"; "--Select One --"; "");
X := @DbColumn("" : "NoCache" ; "" ; "Region Maintenance" ; 1);
S1 : X


Thanks
fordraiders

Answer : Formula question

The formula gets all values from the first column of view "Region Maintenance".
Then on top of that list adds value "--Select One --", but only when accessed by web browser (when accessed with Notes client it contains only the values from the view).