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This section provides examples about applying XPath expressions
to data from an example process data tree. The process implements
a purchase order process. Routing decisions are made based on the
amount of the purchase. A form is used to collect data about the
purchase and is routed to several people to approve the purchase
and place the order.
The process includes a string variable named approvalState that
tracks whether the purchase request has been approved. Form data
is saved in an XFAForm variable named purchaseForm.
The root node of the form schema is named purchaseOrder.
The process data tree is illustrated in the following diagram.
The nodes below the purchaseOrder node represent
the form schema. The totalCost node is bound to
a field on the form that stores the total cost of the requested
purchase.
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