RE: [xml-dev] Schema definition of element with optional children

> 
> So I can have a choice of two complexTypes, adressFullType 
> and addressDeletedType?

You could define one type that has a choice of two content models. But you
can't say that the choice of the content model depends on a particular
attribute; and attributes aren't part of the content model, so you can't
constrain which child elements can appear with which attributes.

Michael Kay
http://www.saxonica.com/