Hi all,

I have been asked to add default rules to a decision table.

We have a decision table with several conditions. Data from first two
columns are passed to action with binded variables. The action collects data
from all passed rules.

-------------------------------------
condition 1 | condition 2 | ... | action
-------------------------------------
 AAA         | AD            | ... |  X
-------------------------------------
 BBB          | AD            | ... |  X
-------------------------------------
 BBB          | AE            | ... |  X
-------------------------------------
 BBB          | CC            | ... |  X
-------------------------------------
 CCC         | AD            | ... |  X
-------------------------------------
 DDD         | AD            | ... |  X
-------------------------------------
 BBB          | AE            | ... |  X
-------------------------------------
 ...            | ...            | ... |  X
-------------------------------------

Recently business asked me if it is possible to have default rules (rows) in
the table if there is not any rule passing condition 1.

-------------------------------------
 DEFAULT   | AD            | ... |  X
-------------------------------------
 DEFAULT   | AE            | ... |  X
-------------------------------------

Is it possible to have rules in decision table those can be fired only if a
specific part of LHS never occurs in others rules?


Thanks in advance, 

Syargey

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