Can I enforce the order of XML attributes using a schema?

Question

Our C++ application reads configuration data from XML files that look something like this:

Answer 1

XML attributes don't have an order, therefore there is no order to enforce.

If you want something ordered, you need XML elements. Or something different from XML. JSON, YAML and bEncode, e.g. have both maps (which are unordered) and sequences (which are ordered).