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It
is often useful to retrieve a group of nodes from the data model.
For example, to use the renderForm operation of the Forms service,
you need to specify the form data.
The process data tree is illustrated in the following diagram.
You can use the following XPath expression to retrieve all the
nodes below the data node:
/process_data/purchaseForm/object/data/*
The * symbol is the XPath syntax that represents
all child nodes.
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