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John Graybeal wrote:
> We are writing XML of the form:
> We would like to specify (for example), that there can be only one of required_element, only one of optional_element1, but as many as desired of optional_element2. Plus, we would like to be able to specify the elements in any order.
Since David brought it up ;-} the RELAX NG compact syntax solution would be:
required_element & optional_element1? & optional_element2*