I can see some benefits to modeling this way and in this particular example, your sequence technique looks to be complimentary with the streaming SQL approach.

Hello all, very interesting discussion clearly showing the limitations of (timed) windows and data streaming/continuous queries approaches to CEP. I am with

If I read the response correctly, I think we are mostly in agreement. from my perspective, classifying a problem as EP or not isn't important. what matters

So in all this, there seems to be exactly one piece classification that comes with any kind of real theory on why it matters. On one hand, we might interpret

I'm enjoying this discussion. anyone else notice that a slight change in the semantics of the patterns ends up changing the problem? Phrased one way, the

... "Was IP address X logged in anytime during the 3 weeks before IP address Y logged in". Brian

Tim, ... Is this just an obtuse way of agreeing that the problem as posed isn't an event processing problem without seeming to agree? :-) ... Being pedantic,

Hi Luis, Of course this is an event processing problem. You just did not word it in a way to make it sound like one for the EP crowd, LOL: Event A: "Company X

Hi, I'll try to answer your questions. ... Yes. ... I purposely described the query as a static, ad-hoc one, to simplify. But you may as well want to perform

I have to concur with Brian, Hans and Opher here. ... Nothing whatsoever, except that event processing has to be considered alongside conventional data

Hi Luis: congrats on tasking the CEP community with another apparent conundrum! I drafted a reply yesterday but thought it too obvious - today I see the debate

Esper actually indexes the named window contents based on the predefined query. Thereby predefined queries *can* become much less expensive to execute. Below

Hello Pedro. The main issue with this query is that it is not a query that deals directly with the event history, but with the temporal semantics imposed by

I think the major issue that “simple” queries like these highlight, is that most Complex Event Processing implementations are designed to take into account

Here's my 2 cents based on first hand experience implementing natural language rule editing. regarding A, the english has to be translated to logic first,

Dear all, Let me recast this question and address some of the comments and answers. But first, thanks to all, it was an impressive set of detailed answers.

good question. The reason I mention first order logic is that it's closely related to logic programming. Defining patterns for a EP engine or rule engine is

Here is my draft list of the Top Ten Cybersecurity Threats for 2009.  Your comments are greatly appreciated.  I will publish the final list later this month, based on comments received. — Constant negative news reporting and adverse analysis undermining public and business confidence in leadership, business management and economic recovery efforts. — Criminal manipulation, fraud and [...]

Despite what you might think from reading these recent messages, it's worth remembering that not everything revolves around EP applications destined for

The battle between powerful DB engines and nimble processes that keep a limited set of state in memory has been waged on the trading floor since time