Workflow Patterns - Oracle SOA Suite 11g R1 Developer's Guide - page 536

For our purposes, we will set the following flex fields in our (OrderFulfillmentTask :

Flex ield Attribute

textAttribute1 itemId

textAttribute2 buyerId

numberAttribute1 salePrice

numberAttribute2 totalPrice

dateAttribute1 saleDate

textAttribute3 orderStatus

textAttribute4 nextAction

You will need to update the local variable initiateTaskInput , which
will be defined in the scope with the same name as the Human Task
( OrderFulfillmentTask in our case). The flex fields are located in the
systemMessageAttributes element of the task element, as illustrated in
the following screenshot:

Accessing flex fields
Once we have populated the flex fields, we can access them in our query just like any
other task attribute. This will give us a displayColumnList that looks as follows:

<displayColumnList
xmlns="http://xmlns.oracle.com/bpel/workflow.taskQuery">
<displayColumn> TaskNumber </displayColumn>
<displayColumn> Title </displayColumn>
<displayColumn> UpdatedDate </displayColumn>
<displayColumn> TextAttribute1 </displayColumn>
<displayColumn> TextAttribute2 </displayColumn>
<displayColumn> NumberAttribute1 </displayColumn>