OIC get data from cdata in XML

We are receiving XML from third party system. We need to capture data in OIC, which is in CDATA element. Need to know which function can be use in OIC to get the data. So, we need data like "REQ200777" or other data elements in CDATA in OIC.
Sample XML

<?xml version="1.0" encoding="utf-8"?><ReqDoc transaction_type="SEND" client_name="TEST" client_id="Client001">
<header>
<field ariba_type="java.lang.String" ariba_field_name="Type" field_label="Type"><![CDATA[clientInfo.procure.core.Requisition]]></field>
<field ariba_type="java.lang.String" ariba_field_name="UniqueName" field_label="ID"><![CDATA[REQ200777]]></field>