ddossot / nxbre Goto Github PK

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?

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.

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>

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

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

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

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

cheers

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

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

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

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?