In our current system, I have noted a pattern of hierarchal inheritance with 
regards to gathering configuration information .  In the simplest case, we 
add generic foreign key to the table containing the configuration and check 
the existence of records in order of a predetermined precedence. For 
example, to find a pay rate for work completed we check for the following 
objects in the rate table:

   1. Contractor - the person being paid
   2. WorkType - the reason the payment is being made
   3. JobSite - the location making the payment
   4. Client - the account it is being payed from
   
These objects are not related except by business logic and the hierarchy 
varies depending on the setting being asked for.  While code which using 
this data is simple, the administration has become incredibly difficult from 
a UI perspective.

I was wondering if there are any apps out there which implement this kind of 
functionality with the associated admin pages/widgets before I go rolling my 
own.  I have looked, but haven't been able to find anything that suits this 
situation.
 
Thanks   

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