How to Manage Cardinality in SSGT?
Cardinality rules can be specified by editing the default cardinality specifications (minOccurs=0, maxOccurs= unbounded) in a generated subset schema. However, this introduces a development maintenance burden, since each time the subset is regenerated out of the Subset Schema Generation Tool (SSGT), the same edits must be reapplied.
For this reason, a best practice has evolved in the community to represent cardinality rules in constraint schemas.
A feature has been requested for the SSGT to allow specification of cardinality constraints directly in subset schemas. So far, this feature has not been implemented by GTRI.