Rules should be for complex rules

Question

Hi,
Could you please help to write rules for following two business scenarios for following type of hierarchical data input to Oracle rule decision Function.
1. To make sure that InstanceId is unique across the data. (According to this sample, this rule must be evaluated to 'true')
2. TimeRef data (2 data points as per the sample) within Town.Village is same as the TimeRef data is referenced by the Town.Village->ItemRef value (ItemRef refers the ItemData defined at the top. value refers using InstanceId). (According to this sample, this rule must be evaluated to 'true')
<GoodsTransport>
     <TimeData InstanceId="221">1</TimeData>
     <TimeData InstanceId="222">2</TimeData>
     <TimeData InstanceId="223">3</TimeData>
     <ItemData InstanceId="111">
          <TimeRef>221</TimeRef>
          <TimeRef>222</TimeRef>
     </ItemData>
     <Town InstanceId="4444">
          <TimeRef>222</TimeRef>
          <TimeRef>223</TimeRef>
          <Village InstanceId="6666">
               <ItemRef>111</ItemRef>
               <TimeRef>221</TimeRef>
               <TimeRef>222</TimeRef>
          </Village>          
     </Town>
     <Town InstanceId="4445">
          <TimeRef>221</TimeRef>
          <TimeRef>223</TimeRef>
          <Village InstanceId="6667">
               <ItemRef>111</ItemRef>
               <TimeRef>221</TimeRef>
               <TimeRef>222</TimeRef>
          </Village>          
     </Town>     
</GoodsTransport>
Thanks
Hareendra
How can I write a rule

Answer 1

Have not any one wrote complex rules like this?
Since the JDeveloper allows to create FACTS using schema file, I thought that this is a simple case with Oracle rules....is not it the case?
I posted important questions after looking at my customer requirement but the response from this ORACLE forum is unacceptable. I initially thought that this is a big forum from ORACLE and can find answers easily...but looking back now, I doubt that this even working at all:(.
- Hareendra
Note:
I saw lot of disappointed statements from many people on this forum unfortunately.