[rules-users] design question - how to modell this in DRl

[Thorsten Trägenap]

Hi,

I´m totally new to Drools and DRL.
I want / (better words I must, because of my diploma thesis) to connect 
a couple of different software-applictions using Drools as logical 
middleware.

First i want to translate some kind -like the following ones- of natural 
rules into DRL and I have no idea how to do this in correct way.

Facts are
- Order
Order contain information about "creationDate" and "customerBelongingTo"

- Customer
Customer contains information (=days as int value) about 
"allowedTimePeriodWithoutNewIncomingOrder", on expiry of this time 
period this customer should me marked to inform a "Person"


- Persons
There are living persons(maybe) which are interested in
"customersWithNoNewIncomingOrder". The should be informed by mail, etc.

Please any idea to do this in best DRL way?

Thanks
Thorsten Trägenap