You can load the data straight into the test environment, read it into data files for processing later, or read it in real time and convert it as you use it.

For example if the node-set is used in a Boolean context, the only processing needed is to test whether it is empty.

We will follow a top-down approach to this scenario, first executing the test, then analysing the processing that occurred, and then, finally, looking in detail at the specification of the test step.