[rules-users] "Negative" Rules

[Ansgar Konermann]

On 15.12.2010 10:01, Diego San Esteban wrote:
> Greetings,
>   
> How is  itpossible to implement a  "rollback"in  theKB?
>
> Suppose  that when retracting  a  fact,I  want toundo the  changes  made.
>    

A very simple, yet effective solution would be to exclusively use 
insertLogical(). No updates to facts which are already asserted, no 
normal "insert".

Best regards

Ansgar
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