Question

Is it possible to set and retrieve default values in an XML hierarchy.

    <commission-rate>
        <region-NA> <!-- can we set a default at this level, if userId is NOT 123, it should return this default -->
            <userId-123>
                9
            </userId-123>
        </region-NA>
    </commission-rate>

For example, if I want to retrieve commission-rate.region-NA, it should return the default (say 5), but commission-rate.region-NA.userId-123 should pull 9 as the value.

Also, is using XML tags like this recommended or I should be using named attributes (e.g.

Thanks in advance.

Answer 1

For your first question:

XML document on its own does not contain any default values. It just contains the values that the document contains. Everything else is undefined.

For your second question:

Please see: How should you structure your xml file?