Thank you Tim, Rick, Andreas, and Stephen for your excellent replies!

Tim asked about my use case. I have two different XML vocabularies for aeronautical navigation data. I want to convert XML instances of one to equivalent XML instances of the other. Here is a tiny example of the kind of conversion needed for the aeronautical navigation data:

Both XML vocabularies specify data about magnetic variation, such as the magnetic variation at an airport. Here is an XML instance from one vocabulary:

<MAG_VAR>W014404</MAG_VAR>

Here is the equivalent XML instance in the other vocabulary:

<magneticVariation>

    <magneticVariationEWT>West</magneticVariationEWT>

    <magneticVariationValue>14.7</magneticVariationValue>

</magneticVariation>

If an AI/machine learning/data analytics engine were given lots and lots of examples, would the engine be able to determine the mapping/conversion between the two representations of magnetic variation?

/Roger