How to define alternate XML structures in XSD schema?

The solution to this is you would define two complex types to represent each "state" of your structure. Each complex type would apply different constraints to the nested elements within. Then you can simply group the two complex types as items under an xs:choice.

I'm borrowing the thecolour's answer a bit. What I meant that I didn't want to my choice structure to be inside an element.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.