Interesting. Please let me know if I understood this correctly - given the following scenario:
If I have a tag that is currently supported by Tealium where I would like to change a particular field's default derived value, I can override this by creating an Extension catered for it?
Example:
Tag "foobar" contains a field "transaction_amount" which by default references a utag_data data called "subtotal", if i wanted to change the field's value to like something like subtotal+shipping+handling - I would place this computation into a a new variable in an Extension i'll create and then change the reference data of transaction_amount to the new variable/field name?
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