[jboss-jira] [JBoss JIRA] (DROOLS-3594) FEEL: Implement the interval-based algebra functions as defined by J.F. Allen

[Edson Tirelli (Jira)]

    [ https://issues.jboss.org/browse/DROOLS-3594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13769894#comment-13769894 ] 

Edson Tirelli commented on DROOLS-3594:
---------------------------------------

Implementation was done, based on the semantics of CQL operators as defined here:

https://cql.hl7.org/09-b-cqlreference.html#interval-operators-3

> FEEL: Implement the interval-based algebra functions as defined by J.F. Allen
> -----------------------------------------------------------------------------
>
>                 Key: DROOLS-3594
>                 URL: https://issues.jboss.org/browse/DROOLS-3594
>             Project: Drools
>          Issue Type: Enhancement
>          Components: dmn engine
>    Affects Versions: 7.17.0.Final
>            Reporter: Edson Tirelli
>            Assignee: Edson Tirelli
>            Priority: Major
>             Fix For: 7.25.0.Final
>
>         Attachments: ORF2009_Temporal_Reasoning_final.pdf
>
>
> In his paper "An interval-based representation of temporal knowledge", J.F.Allen defines an algebra to resolve interval relationships.
> This algebra is implemented already in Drools core to deal with events.
> This ticket is an RFE to implement similar functions in FEEL to support such algebra in DMN.
> The list of functions is:
> * before
> * meets
> * overlaps
> * finishes
> * includes
> * starts
> * coincides
> * after
> * metBy
> * overlappedBy
> * finishedBy
> * during
> * finishes
> Details of the semantics can be found in the attached presentation, slides 24 and 25.



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