[jboss-jira] [JBoss JIRA] (DROOLS-114) Support "Defeasible" rules in Drools

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor moved JBRULES-3613 to DROOLS-114:
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        Project: Drools  (was: JBRULES)
            Key: DROOLS-114  (was: JBRULES-3613)
       Workflow: GIT Pull Request workflow   (was: jira)
    Component/s:     (was: drools-core)
                     (was: drools-compiler)

    
> Support "Defeasible" rules in Drools
> ------------------------------------
>
>                 Key: DROOLS-114
>                 URL: https://issues.jboss.org/browse/DROOLS-114
>             Project: Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>            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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