| identifier | No | Identifier[] | Business identifier |
| instantiatesCanonical | No | canonical[] | Instantiates FHIR protocol or definition |
| instantiatesUri | No | uri[] | Instantiates external protocol or definition |
| basedOn | No | Reference<Resource>[] | Fulfills plan, proposal, or order |
| replaces | No | Reference<Resource>[] | Request(s) replaced by this request |
| groupIdentifier | No | Identifier | Composite request this is part of |
| status | Yes | code | draft / active / on-hold / revoked / completed / entered-in-error / unknown |
| intent | Yes | code | proposal / plan / directive / order / original-order / reflex-order / filler-order / instance-order / option |
| priority | No | code | routine / urgent / asap / stat |
| code | No | CodeableConcept | What’s being requested/ordered |
| subject | No | Reference<Patient / Group> | Who the request group is about |
| encounter | No | Reference<Encounter> | Created as part of |
| authoredOn | No | dateTime | When the request group was authored |
| author | No | Reference<Device / Practitioner / PractitionerRole> | Device or practitioner that authored the request group |
| reasonCode | No | CodeableConcept[] | Why the request group is needed |
| reasonReference | No | Reference<Condition / Observation / DiagnosticReport / DocumentReference>[] | Why the request group is needed |
| note | No | Annotation[] | Additional notes about the response |
| action | No | RequestGroupAction | Proposed actions, if any |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | Extension[] | Additional content defined by implementations |
| - modifierExtension | No | Extension[] | Extensions that cannot be ignored even if unrecognized |
| - prefix | No | string | User-visible prefix for the action (e.g. 1. or A.) |
| - title | No | string | User-visible title |
| - description | No | string | Short description of the action |
| - textEquivalent | No | string | Static text equivalent of the action, used if the dynamic aspects cannot be interpreted by the receiving system |
| - priority | No | code | routine / urgent / asap / stat |
| - code | No | CodeableConcept[] | Code representing the meaning of the action or sub-actions |
| - documentation | No | RelatedArtifact[] | Supporting documentation for the intended performer of the action |
| - condition | No | RequestGroupActionCondition | Whether or not the action is applicable |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | Extension[] | Additional content defined by implementations |
| - modifierExtension | No | Extension[] | Extensions that cannot be ignored even if unrecognized |
| - kind | Yes | code | applicability / start / stop |
| - expression | No | Expression | Boolean-valued expression |
| - relatedAction | No | RequestGroupActionRelatedAction | Relationship to another action |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | Extension[] | Additional content defined by implementations |
| - modifierExtension | No | Extension[] | Extensions that cannot be ignored even if unrecognized |
| - actionId | Yes | id | What action this is related to |
| - relationship | Yes | code | before-start / before / before-end / concurrent-with-start / concurrent / concurrent-with-end / after-start / after / after-end |
| - offset[x] | No | Duration, Range | Time offset for the relationship |
| - timing[x] | No | dateTime, Age, Period, Duration, Range, Timing | When the action should take place |
| - participant | No | Reference<Patient / Practitioner / PractitionerRole / RelatedPerson / Device>[] | Who should perform the action |
| - type | No | CodeableConcept | create / update / remove / fire-event |
| - groupingBehavior | No | code | visual-group / logical-group / sentence-group |
| - selectionBehavior | No | code | any / all / all-or-none / exactly-one / at-most-one / one-or-more |
| - requiredBehavior | No | code | must / could / must-unless-documented |
| - precheckBehavior | No | code | yes / no |
| - cardinalityBehavior | No | code | single / multiple |
| - resource | No | Reference<Resource> | The target of the action |
| - action | No | [] | Sub action |
