Hi Fernando!
Mi Instance class is the Weka class I attach....
Thanks for your attention.
Isabelle.
Could you please provide your Instance class ?
On 9/27/07, Isabelle Hupont <ihupont(a)ita.es> wrote:
>
>
> Hi!
>
> I want to program the following drl rule in xml:
>
> rule "average calculation"
> no-loop true
> when
> _i : Instance()
> _average : Double()
> from accumulate(accInst: Instance(),
> average(
> accInst.value("tend")))
> eval(_average < 20000)
> then
> _i.setValue("tend",2000);
> end
>
>
> For it, I have implemented the following xml file:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <package name="org.prophet.fuzzy"
xmlns="http://drools.org/drools-4.0"
>
xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"
>
xs:schemaLocation="http://drools.org/drools-4.0 drools-4.0.xsd">
> <import name="weka.core.*"/>
> <import name="org.prophet.gui.docking.*"/>
> <import name="org.prophet.persistence.*"/>
> <import name="org.prophet.persistence.hibernate.*"/>
> <import name="org.prophet.rules.*"/>
> <import name="org.prophet.*"/>
> <rule name="Rule1">
> <rule-attribute name="no-loop" value="true"/>
> <lhs>
> <pattern identifier="_i"
object-type="Instance"/>
> <pattern identifier="_average"
object-type="Double">
> <from>
> <accumulate>
> <pattern identifier="accInst"
> object-type="Instance"/>
> <external-function evaluator="average"
> expression="accInst.value("tend")"/>
> </accumulate>
> </from>
> </pattern>
> <eval>_average < 20000.0</eval>
> </lhs>
> <rhs>
> _i.setValue("tend", 2000.0); manageRuleFired("Rule1", null, _i);
> modify(_i);</rhs>
> </rule>
> </package>
>
> And I have the following error when reading the rule package:
>
> org.drools.rule.InvalidRulePackage: Rule Compilation error _average
> cannot
> be resolved _i cannot be resolved _i cannot be resolved _i__Handle__
> cannot
> be resolved _i cannot be resolved
>
>
> I also have tried to replace the xml identifier <pattern> by <column>
> with
> no result. Can you help me, please?
>
>
> --
> View this message in context:
>
http://www.nabble.com/accumulate-funtion-in-xml-tf4526879.html#a12916380
> Sent from the drools - user mailing list archive at
Nabble.com.
>
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>
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>
--
Fernando Meyer
http://fmeyer.org
JBoss Rules Core Developer
fmcamargo(a)gmail.com
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