Middle way between XSD all and XSD sequence

Question

I\'m defining a user element with XSD. For this example, a user has a name, email and one or more nationalities. I\'ve tried:

Answer 1

I think what you're looking for would go against the intent of XML. It would seems strange to have a valid XML fragment like this:

It sounds like you're asking for something like what marc_s proposed:

which needs to get pushed into: