SourceForge has taken down the KB, which used to be at: http://sourceforge.net/apps/trac/nxbre/

Recover it from http://wayback.archive.org and store it here, at GitHub.

I have two separate business objects which are not related.

Product -> Name, Price, Category
Orders -> CustomerName, ProductName, Qty, Gross Amount

Now I want to calculate "GrossAmount" for all the orders, using formula (Product price * Qty)
here, Product price is to select price of product using ProductName from Product list.

My RuleML(0.9) looks like below;

    <Implies>
      <oid>
        <Ind>lable:Calculate Order Gross Amount</Ind>
      </oid>
      <And>
        <Atom>
          <Rel>Price</Rel>
          <Var>Product</Var>
          <Var>Value</Var>
        </Atom>
        <Atom>
          <Rel>OrderQty</Rel>
          <Var>Order</Var>
          <Var>Product</Var>
          <Var>Qty</Var>
        </Atom>
      </And>
      <Atom>
        <Rel>GrossAmount</Rel>
        <Var>Order</Var>
        <Ind uri="nxbre://binder">CalulateTotal</Ind>
      </Atom>
    </Implies>

But here atoms are not matching, so how can I relate them?

Kindly provide support\resolution as early.

Regards,
Alpesh L

As with facts, Is it possible to create Implications dynamically at runtime?
If possible give some example.

...so you might want to remove any reference to it.

cheers

As a results of Implication evaluation, new facts are asserted in working memory. This makes size of fact-base heavier when working with large set of data. so at later if I want to remove these facts from memory then how can I achieve the same?

Is IE self disposable?

How to clear memory of engine?

Best practices related to performance?

What is the difference between and in Atom?

can I specify data type of Individual predicate like below;

      <Atom>
        <Rel>Discount</Rel>
        <Var>Product</Var>
        <Ind type="double">2</Ind>
      </Atom>

I want to load empty rulebase initially and then add implications & queries to working memory of inference engine. How do I achieve the same?

Is it possible to change property value or add new properties to business objects from RuleBase (as a part of Implication result)?

If yes, please provide sample code to achieve the same

The concept of "the control mode" of business object binders is not cleared.
where can I find more detail on the same?

Greetings @ddossot , I have been experimenting on Nxbre from quite some time for my college project. Although it has been amazing journey with it. But I got stuck in implementing a functionality when using If/ElseIf/Else condition. I noticed that there was "IN" operator to be used but "NOT IN" operator was missing. I tried a way to implement it using Objeclookup and invoking a method of mine own to execute it, but XSL schema that is defined in engine doesn't let me do so.

Basically what I was implementing was

I just wanted to know, if there was some other way to do so or not.
Thanks

Is there any example of using Rulebase Adapters, like ones for fetching facts from a RDBMS or a web service, the user can provide facts to NxBRE with a different approach than by directly asserting facts in the engine.

I found following different versions of RuleML.
Which version is stable & should we use in our development.

ruleml-0_8-datalog.dtd
ruleml-0_86-datalog.xsd
ruleml-0_86-nafdatalog.xsd
ruleml-0_9-nafdatalog.xsd
ruleml-0_91-nafdatalog.xsd

Also what is the difference between datalog & nafdatalog?