About Validation Rule XQuery Expressions

This topic describes how to use the Order Recognition Rule editor Validation Rule area XQuery tab to write an expression that specifies nodes in the incoming customer order that must evaluate to true to accept the customer order into the system. The XQuery has the following characteristics:

Context: The input document for the Validation Rule XQuery is the customer order. For more information about typical customer order structures, see OSM Concepts.
Prolog: The input document for the Validation Rule XQuery is the customer order. You can declare the customer order namespace in the XQuery prolog. For example:
```
declare namespace im="http://xmlns.oracle.com/InputMessage";
```
Body: The validation rule must specify customer order parameters or parameter values to evaluate to true for the validation to be successful. If the validation fails, the expression should return an error message.

In addition, if the Validation Rule fails, OSM automatically creates the order and sets the order state to Failed. The inbound message and validation failure output are attached to the order for reference. You can display and manage the order failure in the Order Management Web client.

The following sample XQuery checks for the existence of a sender ID:

if (fn:exists(./header/c:Sender/c:ID) and ./header/c:Sender/c:ID != '')
  then (true())
     else concat("SEVERE", "Message Header should contain Sender ID", header/Sender/ID")

The following sample XQuery checks for correct values in the typeCode data element in the incoming customer order:

if (fn:exists($orderLine/im:ItemReference/im:TypeCode) 
    and 
    $orderLine/im:ItemReference/im:TypeCode != '') 
then 
    (
    if ($orderLine/im:ItemReference/im:TypeCode = "PRODUCT" or 
        $orderLine/im:ItemReference/im:TypeCode = "OFFER" or 
        $orderLine/im:ItemReference/im:TypeCode = "BUNDLE") then ()
    else
       local:reportIssue("ERROR", "Product Type should be one of: PRODUCT, OFFER, BUNDLE", 
             $lineNum, "ProcessProvisioningOrderEBM/DataArea/ProcessProvisioningOrder/
                        ProvisioningOrderLine/ItemReference/TypeCode")
)

Given this XQuery sample, the following part of a customer order would evaluate to true because the typeCode element value is BUNDLE.

<!-- FIXED BUNDLE - BUNDLE -->
<im:salesOrderLine>
          <im:lineId>2</im:lineId>
  <im:promotionalSalesOrderLineReference>1</im:promotionalSalesOrderLineReference>
          <im:serviceId></im:serviceId>
        <im:requestedDeliveryDate>2001-12-31T12:00:00</im:requestedDeliveryDate>
        <im:serviceActionCode>Add</im:serviceActionCode>
                        <im:itemReference>
                                        <im:name>Fixed Bundle</im:name>
                                        <im:typeCode>BUNDLE</im:typeCode>
                                        <im:specificationGroup />
        </im:itemReference>
</im:salesOrderLine>

For more information about validation rules see OSM Concepts.