f:Endpoint extension with URL = 'https://sequoiaproject.org/fhir/sphd/StructureDefinition/Transaction': maximum cardinality of 'extension' is 1 extension with URL = 'https://sequoiaproject.org/fhir/sphd/StructureDefinition/Version': maximum cardinality of 'extension' is 1 f:Endpoint/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