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Re: Congratulations on Christian's and co. courage

From: Gary Hallmark <gary.hallmark@oracle.com>
Date: Wed, 03 Sep 2008 15:55:03 -0700
Message-ID: <48BF15C7.7010408@oracle.com>
To: Alex Kozlenkov <alex.kozlenkov@betfair.com>
CC: public-rif-wg@w3.org

With PRD you have negation so if you "remember" (using a predicate, 
e.g.) which events you processed, you can suppress similar events.

Alex Kozlenkov wrote:
> Gary,
>
> By two identical facts I mean facts that are identical up to OID. This
> is especially interesting in the context of CEP extensions that
> interpret incoming events as new facts. What I was trying to say is that
> normally, there is no control at all over how such facts satisfy the
> rules. Such situation may arise, for example, when there are event
> duplicates.
>
> -----Original Message-----
> From: Gary Hallmark [mailto:gary.hallmark@oracle.com] 
> Sent: 03 September 2008 18:31
> To: Alex Kozlenkov
> Cc: public-rif-wg@w3.org
> Subject: Re: Congratulations on Christian's and co. courage
>
> no such thing as 2 identical facts.  Relations are sets.  Frames have a 
> unique OID.
> Note that PRD currently has no way to create a new object, and that is a
>
> problem we need to fix.
>
> Alex Kozlenkov wrote:
>   
>> And one more comment about the minimality I'm discussing in my
>>     
> previous
>   
>> post. This is not an idle question. If there exist two identical
>>     
> facts,
>   
>> will there be two actions executed or only one? In the language
>>     
> dialect
>   
>> for event processing that the JBoss guys are developing, I was trying
>>     
> to
>   
>> understand whether A<=B,C given B and C matching incoming events, if C
>> was detected twice, would the action A be executed twice? What I mean
>>     
> is
>   
>> that there may be situation when we want to only detect one situation
>>     
> so
>   
>> that the sequence of events CCB should execute A only once.
>>
>>
>>
>>     
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Received on Wednesday, 3 September 2008 22:56:33 GMT

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