Hi everybody, I hope some of you can tell me if I can do something with my problem. I have a table in a DB with medical information from too many patients. This information was captured in paper and after put into the table. The questions have a sequence, and a few answers depend of other answers, for example: P1. Age:____ P2. Gander: 1: Female, 2: Male --> if P1 >= 12 and P2 = 1 then go to p3, else go to p5 P3. How many times have you been pregnant? 0, 1, 2, 3, 4, 5, ______ --> if number > 1 go to P3 else P5 P4. How many babes were born alive? 0, 1, 2, 3, 4, 5, _______ P5. Do you smoke? 1: no, 2: yes In the table I have something like this: mysql> SELECT * FROM table; |id||P1|P2|P3|P4|P5|STATUS ------------------------------ |1|34|1|3|2|1|NULL |2|10|1|3|2|1|NULL |3|21|2|1|1|1|NULL |4|66|1|0|1|1|NULL |5|14|2|NULL|NULL|1|NULL |6|09|1|NULL|NULL|1|NULL I try to set STATUS = "OK" when information was consistent, i.e. ID = 2. A girl of 10 years hardly been pregnant 3 times ID = 3. A man can't get pregnant or abort ID = 4. A woman can't abort if the number of times she has become pregnant is zero I'll try to use Drools to do something like this. rule "Age and gender women" no-loop when p : Person(p1 >= 12 && p2 = 1) then //execute rule "Pregnant" end rule "Pregnant" no-loop when p : Person(p3 > 1) then //execute rule "Aborts" end rule "Pregnant" no-loop when p : Person(p4 <= P3) then //it's ok p.Status = 'OK' end Is this possible??? I read than you can't nested rules, but I want to know if exist some way to do. Since now my thanks for any help. Best regards. Leo. -- View this message in context: http://drools.46999.n3.nabble.com/How-can-I-nested-rules-tp4020488.html Sent from the Drools: User forum mailing list archive at Nabble.com.