If you respond to the email from the group from a email client that supports, for example, RTF, then you can apply formatting. In other words, subscribe to...
Hi David - ... correlator". Correct. ... Correct - we are looking for (i.e. defining) an event pattern in this example, not generating events. ... case, will...
David - I have responded, and I think solved, the exercise you posed: could you explain to me why that solution is NOT CEP, based on your definition? - Mark...
Marco - welcome to the group. I think an illustrative example of how ECA style rules work would be for you to propose how they might solve the "CEP Challenge"...
... I don't know the DSM guys, but there is nothing inherent about an ESP system which insists it must process events in order. Perhaps this is the basic...
Hi Group, After a quick look at the challenge I think it would be straightforward to do in ruleCore. The reaction rules in ruleCore are event driven...
Mark, the problem requires a relational operator => such that A => B means "A is a cause of B". Basically, your solution would match correctly if "A -> B"...
Greg, seems to be a small misunderstanding about what an attribute of an event is: "This does not mean the cause is not an attribute of the event, unless you...
... Here are how I see it in my world... ... Yes, something that really happens. Either in the real world or a in a more abstract way, like inside a computer....
Hi, I am not a professional of CEP systems therefore I tried the exercise on the assumptions I made. My answers are based on Marco's ones. - Damien ... We have...
Dear all, First of all, let me introduce myself to the group. I am Sudeep Goyal, a student from IIT, Bombay, India. I have been looking into rule-based engines...
Well, in my implementation centric world I really, really don't want to deal with two events happening at the exact same time. So, with enough timer resolution...
Hi all, After Googling a lot, I am still not clear on the relationship between various event correlation technologies used in NMS (network management systems),...
Hello Snadeep. Let me try to answer your question. First, "event correlation" in network and system management is a specific application, which is filtering...
Dear colleagues, I would be very interested to know what are the very most general/powerful schemes for defining executable computer representations of...
Opher, your attachment for you SQL proposal didn't come across the list. Do you have it up on the web? One important thing that I've seen from SQL-like stream...
David, in response to your comments: One reason that I keep coming back to stream processing as an underlying feature is that you can always save the contents...
Hi David & Group, I have been implemented something that sounds very much like what you are going to build. So I can give some advise based on my work on ...
Hans, A couple of points on your last post: - Most event processors will process events one-at-a-time. True. But that is different from assuming the events are...
David - I'll respond to your follow-up questions about how one can solve the problem of out-of-order events - the challenge of "a causes b" - I believe there...
All - continuing the "event out of order" scenario... To handle the situation to precisely match when C occurs before A, the EPL code can be written as...
A couple of thoughts about this event causuality stuff... I see only one sane (or perhaps two) way of doing this, and it is for the sender system to record in...
Marco, A review of Chapter 11 in David's Book might help provide more insight into the many aspects of CEP causality. In particular section 11.4 addresses a...
Yes, causual models/maps as described in the book seems to be a really good idea and are described really good there. But I would not use them. Seems to be a...
David asked me to forward this to the group because his email client doesn't allow him to send formated email. As a reminder, for anyone who uses an email...
There have been some comments about "let's not descend into the how"; as the co-moderator, and for the record, I think we should not restrict the debate - the...
And, to summarize, the solution I sent yesterday achieves precisely what David describes - the language syntax is different, but the result is the same. - Mark...
... Yes, now we are talking ;) shoot! (I like time...) So to expand the problem. What if we only want to detect A if it is caused by C within one hour of C,...
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