f:Immunization protocolApplied: minimum cardinality of 'protocolApplied' is 1 f:Immunization/f:extension id: maximum cardinality of 'id' is 1 url: minimum cardinality of 'url' is 1 url: maximum cardinality of 'url' is 1 value[x]: minimum cardinality of 'value[x]' is 1 value[x]: maximum cardinality of 'value[x]' is 1 f:Immunization/f:protocolApplied targetDisease: minimum cardinality of 'targetDisease' is 1