October 2008 - rules-dev - Jboss List Archives

by Ravindran, Ratheesh (NSN - IN/Bangalore)

Hello, I was evaluating different CEP tools and heard about Drools. Is the CEP support available in Drools M2 release ? I had downloaded the binary release but it does not contain classes like EntryPointInterface for using with Streams Best Regards Ratheesh

17 years

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Naive questions on rules

by Wei Tai

Hi All, I am not sure whether it is the right place to put this question here. Currently I am working on rules and got confused with some concepts: What are the relationships between: resolution, backward chaining, modus ponens, foward chaining, production rule system, prolog, logic programming? Can all forward chaining systems be considered as logic programming system? Some of these concepts seems overlap with each other. Can somebody kindly give me an answer to these questions. Thanks in advance. Best Regards Wei

17 years

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Score standardization in drools-solver: going beyond a double

by Geoffrey De Smet

Hi guys, I 'd like to redesign the current score subsystem in drools-solver, but I 'd like your thoughts on it. Basically I feed the subsystem a Solution instance on which the DRL rules calculate a score (currently a double). Here are my thoughts, feed-back very welcome: Score function standardization ============================== - Currently a score is a double and that just won't do - Different types of scores should be implementable: -- just a (hard) constraint total, as an int -- just a (hard) constraint total, as a double -- a hard and a soft constraint total, as 2 ints -- a total for each constraint, as seperate ints -- custom implementations => So there should be a Score interface => Build-in implementation of HardAndSoftScore and IntScore? - Any 2 scores of the same problem should be comperable for recognizing the best solution => The score interface must implement Comperable and have the method compareTo(Score) - A score shouldn't change -- So it can be compared to in later steps -- You can't do that with the current ScoreCalculator instance as it changes all the time. -- So they can be collected for statistical information - A score should be thread-safe if possible => A Score implementation should be immutable - A score should be made by the drl, once for every fireAllRules = calculateScore -- What if I start adding move generation and move implementation into the drl later? That lifecycle match won't fit no more? Should I look into agenda's or flow? - Should a score be put into a global variable directly or still into a global ScoreCalculator (=ScoreHolder?) instance? What's the point of the latter? Extra ===== - Any 2 scores of the same problem can also be compared on a different than normal scale to pick the next step: -- For recalling the best solution, a hard constraint outweighs any soft constraint. -- For deciding the next step, a hard constraint can be weighted into the soft constraints, if hard constraints haven't been broken much in x steps. -- That weighting into can differ from step to step, so it should be supplied by the caller --- Should that weighting be just an int, or something more complex? Let's call it an Equalizer for now. => The Score interface must have a method compareTo(Score, Equalizer) -- With kind regards, Geoffrey De Smet

17 years

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Performance Question

by hare ram

Hello all, This is the set of rules i have rule "IP Route File rule" salience 2000 when Line ( line matches "^.*\s+show\s+ip\s+route\s*$" ) Line ( line matches "^.*\s+dest\s+address\s*$ ) file : FileFinder() then file.setFileType("ip route file"); drools.halt(); end All I am doing in rules is, I read each line from the given file, convert them into Line Objects and see if any of my rules matches. There are about 50 such rules, that will help me differentiate what kind of file is present in my input directory. The question I have , is there a way I can know if Line Object matched any of the rules ? If a Line Object is not matched by any of rules, I can just retract that object from the memory and prevent Out of Memory Exception if the file size is huge Thanks Shiva

17 years

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Re: [rules-users] No globals in functions?

by Edson Tirelli

Hi Dave, Excellent! I will try to explain the current situation and one possible solution, but you may have better ideas. Functions in Drools are compiled as simple static methods in a generated java class. We use MVEL Templates to generate the code of the class and the static method. Take a look at JavaFunctionBuilder.java class for the code generation call and at javaFunction.mvel for the code template. Now, the problem with globals is that they are scoped to sessions, not rulebases, so you can not resolve them until runtime. You can not for instance, make them a static reference of the generated class and set it at rulebase compilation time. So, my suggestion would be to: 1. at compile time, use JavaDialect.analyzeBlock() method to analyze and find out what are the globals that are used by the funcion method code. 2. modify the code generation to add parameters to that in the method call. So, if "log" is a global and if the function is declared like this: function void someFunction( String param ) { // ... code ... log.something(...); // ... code ... } you detect the use of "log" and add it as a parameter of the generated method: ... public static void someFunction( Logger log, String Param ) { ... } ... This way, at runtime we can inject the parameter into the call. You can look at JavaConsequenceBuilder.java and javaInvokers.mvel to see how we do kind-of the same thing for consequences. 3. Now the most interesting part. :) We use an ANTLR grammar for parsing Java code blocks. You need to change the parser to rewrite any function call the user is doing in his code to inject the log parameter transparently. I did the very same thing for modify blocks: modify( $something ) { ... } It is not hard once you get the hang of it. It is a bit of "hand work" though. Look at the JavaConsequenceBuilder.fixModifyBlocks() for what I did. Also, the ANTLR Java grammar is java.g. Let me know if you have questions or if you have a better idea, and welcome aboard! Cheers, Edson 2008/10/13 David Sinclair <dsinclair(a)chariotsolutions.com> > Hi Edson, > > My name is dave sinclair. I started using Drools in early August of this > year, but have a lot of experience with rules engines. I have worked > primarily with ArtEntrprise and some with PegaRules. I would love to help > with this project and thought that this may be the area to jump in on. > > I have the M2 code, and was reading it over the weekend. Mostly the core > and some of the compilier. If you want to point me in the right direction on > the global/functions I'd be happy to have a look. > > thanks > > dave > > > On Mon, Oct 13, 2008 at 9:59 AM, Bagwell, Allen F <afbagwe(a)sandia.gov>wrote: > >> Edson, >> >> Thanks for the tip. I figured I'd need to use a workaround like this. >> >> Unfortunately I'm under a series of tight development and test deadlines >> all the way into early summer. Otherwise, I'd have a look. Hopefully someone >> else out there can assist. >> >> Thanks, >> -A >> >> ------------------------------ >> *From:* rules-users-bounces(a)lists.jboss.org [mailto: >> rules-users-bounces(a)lists.jboss.org] *On Behalf Of *Edson Tirelli >> *Sent:* Friday, October 10, 2008 5:46 AM >> *To:* Rules Users List >> *Subject:* Re: [rules-users] No globals in functions? >> >> >> Allen, >> >> There is a technical explanation behind that and we never had the time >> to find a way to overcome this limitation. What you can do, although not >> ideal, is to send the global as a parameter: >> >> funcion void foo( Logger log, String cond ) >> { >> ... >> } >> >> rule XYZ >> when >> then >> foo( log, someString ); >> end >> >> If you or anyone would like to help improving this, let us know and we >> can discuss ways into doing it. >> >> []s >> Edson >> >> 2008/10/9 Bagwell, Allen F <afbagwe(a)sandia.gov> >> >>> >>> There's probably an easy explanation for this. I was wondering about why >>> functions inside of rule files can't access globals? >>> >>> For example, I have a log4j logger that I pass into my rule files via a >>> global. The logger should never be a part of working memory. It's just >>> there to capture valuable feedback. >>> >>> But I can't do this: >>> >>> global Logger log; >>> >>> function void foo(String cond) >>> { >>> if (cond == "error") >>> log.error("I saw an error"); >>> } >>> >>> Because the compiler says that in the function it can't resolve 'log'. >>> >>> -A >>> >>> Allen F. Bagwell >>> e-mail: afbagwe(a)sandia.gov >>> phone: 505/284-4517 >>> fax: 505/ 844-7886 >>> >>> There is no monument dedicated to the memory of a committee. -- Lester J. >>> Pourciau >>> >>> >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> >> -- >> Edson Tirelli >> JBoss Drools Core Development >> JBoss, a division of Red Hat @ www.jboss.com >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com

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Re: [rules-users] Max packages

by Mark Proctor

Joe White wrote: > > Mark, thank you very much for your help, it is greatly appreciated. > > > > "There are improvements we can make to generated code into a single > class and use a switch statement to invoke the correct part, but we > don't have time for that right now, so would need to come from the > community." > > > > I would be interested in doing this work if someone can point me in > the right direction on where to start. > look for the *.mvel templates in drools-compiler you'll see how we generate the code. Then look at all the various java builders, like JavaConsequenceBuilder and you'll see how we construct it. compiled code is done in two places. We first generate an invoker class which implements the interface, like the Consequence interface and then we genernate the code to be executed which is called via the invoker. It needs to be two as the needed parameters for the java consequence to execute differer (different number of vars) so the invokers job is to match the needed interfaces and adapt/bridge to calling to the actual consequence/eval/predicate. We currently generate all the consequence/eval/predicate in a single class per rule, but we have a class per invoker. So we now need invoker apis, like Consequence, to take an int so it can use a switch statement to which allows multiple invocations to be generated into the same file. An idea solution will take a configuration on teh granularity that people want - to what we have now right up to putting everything into a single file for the entire package. > > I also would be interested in doing the work to allow drools to > reference multiple levels of inner classes. > This is done and fixed in 4.0.x and trunk - we just haven't released any binaries wit hteh fix. > > Our work would benefit from both pieces of functionality. I'll move > this to the developer list, but would appreciate if somebody > knowledgeable could show me where to get started on the code necessary > to generate to a single class. > I've cc'd this into the dev mailing list, so please when you reply do so to just that mailing list. > > > > Thanks, > > Joe > > > > *From:* rules-users-bounces(a)lists.jboss.org > [mailto:rules-users-bounces@lists.jboss.org] *On Behalf Of *Mark Proctor > *Sent:* Wednesday, August 13, 2008 2:53 AM > *To:* Rules Users List > *Subject:* Re: [rules-users] Max packages > > > > Joe White wrote: > > Can someone help me understand the relationship between the number of > Packages in a single RuleBase and PermGen memory consumption? I have a > test that generates 200 rules and then adds those rules as different > packages to a single rule base. PermGen consumption grows near > linearly with the addition of Packages to the rule base and on a > default PermGen setting the JVM runs out of PermGen after about 120 > packages. > > It's not related to Packages, it's related to the number of rules and > whether those rules have compiled java parts - like the consequence, > eval etc - each one adds an additional class. > > > > Is every new Package and RuleBase backed by a set of generated > Classes? Is there a way to get around the amount of class generation > that is taking place? > > The test has been run against Drools 5. > > You can use MVEL, which has no class generation. There are > improvements we can make to generated code into a single class and use > a switch statement to invoke the correct part, but we don't have time > for that right now, so would need to come from the community. > > > > Thank you for your help, > > Joe > > > ------------------------------------------------------------------------ > > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users >

17 years

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Check matching between to sets of items

by Ringo CS

Hi all, I have a scenario as below: - object A has a list of items in B type - and a list of item in B type (*) Now I want to check if list of items in object A has an item appears in list mark as (*). If YES, stop the rule. Could anyone show me how to archive that? I appreciate it. Ringo

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Re: [rules-dev] Rule Dependency Generator

by Siddharth Angrish

> Hi Toni, > > I checked out the drools-verifier code. For a little > acclimatization I went through a few files. Looks like Verifier.java is the > main > class for verifier tool. I went on to check how the Consequences are being > handled but could only find the interface Consequence.java and > TextConsequence.java which doesn't do too much. > It would be helpful to have some higher level description of the relevant > class relationships. (who's who). > Also, it may be helpful to know how to build this code and how to run it. I > checked out the code from the url: > http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-verifier/ but > could not get any build script or instructions. > > I hope I am going in the right direction. > > Siddharth > > > > > > > > On Mon, Oct 6, 2008 at 6:56 PM, Toni Rikkola <trikkola(a)redhat.com> wrote: > >> Hi Siddharth >> >> Your work sounds interesting and I would like to hear more about it. Looks >> like your version is smarter with dependencies. >> >> The report data is used in Guvnor and in the HTML-report, but it can also >> be retrieved as XML or java objects. >> >> The HTML-report lists all the fields, rules and object types. So you can >> see what rules use certain object type and the field view shows what values >> are compared against the field. This dependency data is also used in the >> verification rules when searching for issues from the rule base. >> >> Like Mark said, the verifier is still quite blind for the RHS. Right now >> it just handles it as a string. So it can't really tell what objects were >> modified and how. This information is important to solve what rule creates >> or modifies facts to satisfy another rule. This dependency data can then >> again be used to find subsumption, loops ect. >> >> I hope that we can discuss about this soon. >> >> Toni >> >> Mark Proctor wrote: >> >>> Siddharth Angrish wrote: >>> >>>> Hi Mark >>>> >>>> I went through the RuleAnalytics Module document. It looks like >>>> there is a good compatibility between your visions of Rule Analysis and our >>>> rule dependency generation work. I'll be excited to further develop and >>>> integrate my work with drools-verifier module code. >>>> >>>> Just a short summary of how I had approached the problem: >>>> >>>> We have long ruleflow which consists of other ruleflows, ruleflow >>>> groups, split conditions. Using drools API I was >>>> able to traverse through the main ruleflow including (recursively) >>>> constituent nodes. So at any node I knew which rules >>>> are relevant. Now, to find out dependency between rules I required very >>>> intricate information about any given rule. I could not >>>> find sufficient drools APIs to get this information. There are methods >>>> to get LHS and RHS of a rule but they do not give information about >>>> individual attributes. For RHS its more worse. No textual information was >>>> availabe about it. (I am using 4.0.7 and I had even posted my questions on >>>> Drools user mailing list) >>>> >>>> As a result, I wrote my own .drl file parser using javacc (which was >>>> very interesting to do) and got whatever information I required. >>>> Now I knew which rule modifies which attribute (and of which class) and >>>> which rule uses what atrributes in its conditional part. Its much easier to >>>> get dependecy sequence now. I know a few cases where this approach might >>>> produce a false dependency sequence but using other rule-flow(salience, >>>> agenda) information can help us avoid that. >>>> >>>> Now, how shall we go about it? I have installed irc on my system and I >>>> think I require some url to be able to connect to you guys. >>>> >>> The details of connecting with irc are here: >>> http://www.jboss.org/drools/irc.html >>> >>> you want to speak to Rikkola online if you see him. >>> >>> We don't want to add another DRL parser, as we already build up an >>> internal tree - including consequence. So in the drools-verifier you already >>> see how we build the descr tree, although that doesn't yet have an AST for >>> the consequence, however we have java analysier that currently does (using >>> antlr) and this and pulls out used identifiers: >>> >>> http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-compiler/src/m... >>> >>> We also extended our antlr grammar to understand the modify(...) {......} >>> keyword. So you should be able to re-use the code inside of java expr >>> analyzer to rewrite your existing stuff and also reusing our existing descr >>> tree. Hopefully Toni Rikolla can help you with this online. >>> >>> Mark >>> >>> >>>> Siddharth >>>> >>>> >>>> On Sun, Oct 5, 2008 at 7:40 PM, Mark Proctor <mproctor(a)codehaus.org<mailto: >>>> mproctor(a)codehaus.org>> wrote: >>>> >>>> Drools 5.0 has the drools-verifier. This does a variety of >>>> verifications and analysis, like where class fields are used, gap >>>> analysis etc. The Guvnor BRMS can produce HTML reports for this >>>> information. Subsumption isn't done yet, we needed to analys the >>>> consequences for update/modify to try and detect potential >>>> impacted rules - this is also needed to detect which rules depend >>>> on other rules. >>>> http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-verifier/ >>>> http://wiki.jboss.org/wiki/RuleAnalyticsModule >>>> >>>> So we would love to have your work as additions to this, but it >>>> will need to be integrated with the existing drools-verifier >>>> module code and the HTML reporting - can you make that happen? It >>>> would be ideal, as it then means your code is part of the main >>>> project and will be maintained and improved by the community. >>>> >>>> Maybe you could pop onto irc, and chat to us about it more? >>>> http://www.jboss.org/drools/irc.html >>>> >>>> Do you have any visualisation plans? If on the web GWT-Diagram is >>>> turning out to be a great tool >>>> http://code.google.com/p/gwt-diagrams/ >>>> >>>> Mark >>>> >>>> >>>> >>>> Sangrish wrote: >>>> >>>> Hi >>>> >>>> I have been using Drools Rules Engine in our application >>>> for past >>>> couple of weeks. >>>> One of the requirements in our project was to let a user >>>> (anyone who is >>>> writing/analysing the rules) find out >>>> what other rules a given rule depends upon. There were a few >>>> kinds of >>>> dependencies: >>>> 1) Object Attribute dependency: The attributes of an object >>>> being used in >>>> the conditional part of a rule >>>> might be getting modified in the consequence part of >>>> another rule. We >>>> wanted all such rules with each rule having its own >>>> dependency list. >>>> 2) Rule Salience based dependency. A rule having lower >>>> salience should be >>>> executed only after a higher (if any) salience rule has >>>> already been >>>> executed. >>>> 3) Dependency caused by a specific Rule flow. Rules in a >>>> ruleflow group >>>> should be executed only if (if any) Split condition gets >>>> satisfied. >>>> 4) Agenda flow dependency (i.e., one agenda following another) >>>> We could not find much support for this in the Drools API. >>>> Hence we >>>> decided to write our own dependency generator. The tool we >>>> are writing >>>> caters to first 3 dependencies. We might even handle the 4th >>>> one. Since Drools is open source, we thought of >>>> contributing our bit towards >>>> its development. If the drools team wants I can happily work >>>> with them on >>>> getting this functionality plugged in the Drools system. >>>> >>>> >>>> Thanks >>>> Siddharth >>>> >>>> >>>> _______________________________________________ >>>> rules-dev mailing list >>>> rules-dev(a)lists.jboss.org <mailto:rules-dev@lists.jboss.org> >>>> https://lists.jboss.org/mailman/listinfo/rules-dev >>>> >>>> >>>> ------------------------------------------------------------------------ >>>> >>>> _______________________________________________ >>>> rules-dev mailing list >>>> rules-dev(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/rules-dev >>>> >>>> >>> >>> ------------------------------------------------------------------------ >>> >>> _______________________________________________ >>> rules-dev mailing list >>> rules-dev(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-dev >>> >>> >> >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev >> > >

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AAAI Spring Symposium on Intelligent EventProcessing 2009

by paschke＠mi.fu-berlin.de

[ our apologies should you receive this message more than one time ] AAAI Spring Symposium on Intelligent Event Processing AAAI Spring Symposium Wednesday, March 23-25, 2009 at Stanford University http://icep-aaai09.fzi.de/ ===================================================================== Event-based systems are now gaining increasing momentum as witnessed by current efforts in areas including event-driven architectures, business process management and modeling, Grid computing, Web services notifications, and message-oriented middleware. They become ever important in various application domains, ranging from traditional business applications, like supply-chain management, to the entertainment industry, like on-line gaming applications. However, the current status of development is just the tip of the iceberg compared with the impact that event processing could achieve, as already reported by market research companies. Indeed, existing approaches are dealing primarily with the syntactical (but very scalable) processing of low-level signals and primitive actions, which usually goes with an inadequate treatment of the notions of time, context or concurrency (for example, synchronization). For example, some of the current event processing products are descendents of the active database research that misses efficient (formal) handling of termination, priority ordering, and confluence in rule bases. AI and especially symbolic (for example, logic-based) approaches provide native background for the (formal) representation of the above mentioned missing concepts, enabling evolution from event processing systems into intelligent reactive systems. The work done in temporal logic, spatial reasoning, knowledge representation, ontologies, and so on enables more declarative representation of events and actions and their semantic processing. Contextual reasoning can support complex event prediction. Transactional logic can be used for ensuring the consistency between highly dependent processes in a formal way. On the other side, the heterogeneous and highly distributed nature of event-processing systems, especially on the web, provides new challenges for AI and logics, like the contextualized reasoning over large stream data, scalable mapping of complex structures, or distributed approximate reasoning, to name but a few. Possible symposium topics comprise, but are not limited to: ----------------------------------------------------------- Modeling * Conceptual modeling in event-driven processing * Modeling context in event-driven processing * Event processing languages * Business rules and event-driven processing * Editors for complex events * Complex event processing in highly distributed AI applications * Modeling reactive systems using event-driven processing * Event stream processing * Event-driven architecture for Intelligent Event Processing Discovery * Complex event patterns mining * Temporal aspects in event mining * Prediction of events * Discovery of similar event * Discovery of unknown events * Dealing with missing events Reasoning/Processing * Complex event detection * The role of logic in event processing * Distributed reasoning for events * Reasoning with uncertain events * Reasoning under real-time constraints * Complexity in reasoning for Intelligent Event Processing Advanced Applications * Distributed event processing as a basis for AI applications * Financial trading * Web / Internet of Things * Entertainment * Ubiquitous Computing/ Ambient Intelligence * Business Activity Monitoring * AI in global epidemiology monitoring systems * Other domains Submissions ----------- Papers should be prepared using the two-column AAAI conference paper format. Long papers should be at most six pages; short papers at most two pages. Papers must be submitted electronically via the symposium website. Submissions must be in PDF using the workshop submission system for SSS09, at http://www.easychair.org/conferences/?conf=sss09 More Information http://icep-aaai09.fzi.de/ Important Dates --------------- Deadline for submissions: October 31st, 2008 (12.00 AM, GMT) Notification of acceptance: December 9th, 2008 Camera-ready versions: January 16th, 2009 Symposium: March 23-25, 2009 Organizing Committee --------------------- Nenad Stojanovic, chair, (FZI - Research Center for Information Technologies at the University of Karlsruhe, Germany), Andreas Abecker (FZI, Germany), Opher Etzion (IBM Research Lab, Haifa, Israel). Adrian Paschke (RuleML Inc, Canada and Corporate Semantic Web, Free University Berlin, Germany) Program Committee ------------------ Alex Kozlenkov, Betfair Ltd. UK Brian Connell, WestGlobal, UK Christian Brelage, SAP, Germany Darko Anicic, FZI at the University of Karlsruhe, Germany David Luckham, Stanford University, USA Dieter Gawlick, Oracle, USA Gregoris Mentzas, ICCS, University of Athens, Greece Jean-Pierre Lorre, EBM Websourcing, France José Júlio Alferes, Faculdade de Ciências e Tecnologia/Universidade Nova de Lisboa, Portugal Jun-jang Jeng, IBM Watson Research Center, USA Ljiljana Stojanovic, FZI at the University of Karlsruhe, Germany Michal Rosen-Zvi, IBM Haifa Research Lab, Israel Pedro Bizarro, University of Coimbra, Portugal Prasad Vishnubhotla, IBM Software Group, USA Rainer von Ammon, CITT, Germany (to be completed) ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

17 years

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Rules Complexity

by Rajitha K

Our clients needs an AML (Anti Money Lanudering) Monitoring system to be implemented. This system is suppose to monitor the customer, transaction and historical data and generate alerts based on the rules set by the clients. As we are in design and thought process of it, we thought of Drools for this. Our doubts are 1) Are we going in the right direction by using Drools? 2) Can we compare the current data and historical data and do a link analysis using Drools? 3) Can we represent sequential patterns of rules in Drools? 4) DRL or XML format of rules, which is the best method to represent rules? I tried writing complex rules using Drools, but not getting the flexibility. For eg: we need a rule as following: 1. Check the transactions of a non customer on the same day or short period (configurable) 2. Check if all the transactions' originator and beneficiary information are same or not. 3. If transaction amounts are of very small, calculate aggregate and find the sum crosses the threshold limit or not. If yes, raise the alert. Data Set is the list of non customers. From this list, while running the rule, how will I write the rule to find the aggregate for each of the customer and check the threshold? Warm Regards, Rajitha

17 years

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rules-dev October 2008