NameFlagsCard.TypeDescription & Constraintsdoco
.. DomainResource IResourceA resource with narrative, extensions, and contained resources
+ If the resource is contained in another resource, it SHALL NOT contain nested Resources
+ If the resource is contained in another resource, it SHALL NOT contain any narrative
+ If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
+ If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource
Elements defined in Ancestors: id, meta, implicitRules, language
... text I0..1NarrativeText summary of the resource, for human interpretation
... contained 0..*ResourceContained, inline Resources
... extension 0..*ExtensionAdditional Content defined by implementations
... modifierExtension ?!0..*ExtensionExtensions that cannot be ignored

doco Documentation for this format