[jboss-jira] [JBoss JIRA] (JBRULES-3613) Support "Defeasible" rules in Drools

[Davide Sottara (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3613?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Davide Sottara reassigned JBRULES-3613:
---------------------------------------

    Assignee: Davide Sottara  (was: Mark Proctor)

    
> Support "Defeasible" rules in Drools
> ------------------------------------
>
>                 Key: JBRULES-3613
>                 URL: https://issues.jboss.org/browse/JBRULES-3613
>             Project: Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: drools-compiler, drools-core
>            Reporter: Davide Sottara
>            Assignee: Davide Sottara
>            Priority: Critical
>
> Very roughly speaking, "defeasiblity" is about rules being able to prevent other rules from firing, or canceling the conclusions other rules. 
> It is used to manage "exceptions" or "(counter)arguments", where different rules lead to conflicting conclusions and a resolution strategy has to be applied, depending on some relative ordering (strength, salience, temporal, weight, etc..).
> While an ad-hoc implementation is possible combining salience, appropriate insertions/retractions and the rule-based agenda, a more declarative approach should be provided to the user.
> This lack of a feature is currently a blocker for the adoption of Drools in several medical and legal communities, just to cite some.

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