here are three flash demostrate how the rete works，hope they will give u a hand to understand how the rete network work better
http://www.ers.com/Graphics/TheReteNetwork.html http://www.ers.com/Graphics/TheReteNetwork2.html http://www.ers.com/Graphics/TheReteNetwork3.html -----邮件原件----- 发件人: sol myr [mailto:[EMAIL PROTECTED] 发送时间: 2006年2月24日 14:54 收件人: [email protected] 主题: [drools-user] drools and Rete-oo Hi, The Drools website refers to "Rete-oo", but I'm not sure I understand it correctly ... especailly the "Extract Node" (mentioned in the documentation). Suppose I have a class "Stock" which encapsulates some data (for simplicity, I use only Objects, eg "java.lang.Double" ): class Stock{ Double price; Double expectedProfit; Double risk; } Now, suppose I want to do "assertObject(someStock)" But I was the stock to enter the Rete as a Tuple of length 3 (price, profit, risk) , rather than Tuple of length 1 (just 1 Stock encapsulating everything). I understand the 3-tuple approach might give better performance, especially if you're about to play around with just one of the attributes (e.g. run the same simulation over and over again, each time with just a different "risk", while everything else remains fixed). Is that what the Extract Node does ? If so, how do you cause it to work - what exactly should you put in the < parameter > part of the rule ? Thanks very much. --------------------------------- Yahoo! Mail Use Photomail to share photos without annoying attachments. ******************************************************************************************************************************** The information in this email is confidential and may be legally privileged. If you have received this email in error or are not the intended recipient, please immediately notify the sender and delete this message from your computer. Any use, distribution, or copying of this email other than by the intended recipient is strictly prohibited. All messages sent to and from us may be monitored to ensure compliance with internal policies and to protect our business. Emails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. Anyone who communicates with us by email is taken to accept these risks. 收发邮件者请注意： 本邮件含保密信息，若误收本邮件，请务必通知发送人并直接删去，不得使用、传播或复制本邮件。 进出邮件均受到本公司合规监控。邮件可能发生被截留、被修改、丢失、被破坏或包含计算机病毒等不安全情况。 ********************************************************************************************************************************
