For XML schema (XSD) only, there is a special cardinality query parameter which sets the xsd:element maxOccurs attribute. By default it is set to cardinality=n.
Cardinality=1 is useful when we require a schema for individual resources, such as for canonical URLs with a primary key column only.
- integer greater than 0
- string "n"
- string "unbounded"
Applicable to: list of resources, list of arrays, vectors
/Invoice.xsd?cardinality=5 - XSD contains maxOccurs="5" and when validation will check how many times Invoice tag appears in XML file.