#235 XSD export - "Unique Particle Attribution" problem

[rio]

If a generated schema contains for example choice of two sequencies and the first element in the first sequence is the same as the first element in the second sequence then the result is not valid.

Example of input attached.

Validator outputs (meta elements are the first elements in the sequencies):
cos-nonambig: meta and meta (or elements from their substitution group) violate "Unique Particle Attribution". During validation against this schema, ambiguity would be created for those two particles.

[rio]