About Order Item Parameter Binding XQuery Expressions

This topic describes how to use the Order Item Parameter Binding editor, Parameter Bindings tab, Binding Expression area, XQuery subtab to write an expression that defines the bindings for one or more parameters on a conceptual model entity from an order item.

Context: The input document is an input order item. Each order item element in this node set is passed into the XQuery as the context.
Prolog: You can declare the namespace for the incoming order and the namespace for the conceptual model entity in the XQuery prolog. For example:
```
declare namespace im="http://xmlns.oracle.com/InputMessage";
declare namespace otm="CommonModelBroadbandCart/1.0.0.0.0";
```
Body: The body of the XQuery will return a node set of elements that correspond to the conceptual model entity data elements. Since you can have as many separate bindings between the entities as you like, this can return anything from one data element to all of them.

The following example shows an XQuery expression that returns an UploadSpeed and a DownloadSpeed parameter from two name-value pairs where the names are Upload Speed and Download Speed.

declare namespace fulfillord="http://xmlns.oracle.com/InputMessage";
declare namespace otm="OSMCom_3Play/1.0.0.0.0";

<otm:UploadSpeed>{fn:normalize-space(fulfillord:itemReference/fulfillord:specificationGroup/fulfillord:specification[fulfillord:name='Upload Speed']/fulfillord:value)}</otm:UploadSpeed>

<otm:DownloadSpeed>{fn:normalize-space(fulfillord:itemReference/fulfillord:specificationGroup/fulfillord:specification[fulfillord:name='DownloadSpeed']/fulfillord:value)}</otm:DownloadSpeed>