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Record Transformation with cdata

John Mount shows off one of the advantages of using cdata to define data-driven record transformation specifications:

We have a tutorial on how to design such transforms by writing down the shape your incoming data records are arranged in, and also the shape you wish your outgoing data records to be arranged in.

This simple data transform is in fact not a single pivot/un-pivot, as the result records spread data-values over multiple rows and multiple columns at the same time. We call the transform simple, because from a user point of view: it takes records of one form to another form (with the details left to the implementation).

Read the whole thing.