Summary

Mandatory: 1 element
Fixed Value: 1 element
Prohibited: 1 element

<!-- Actual Group -->

<Group xmlns="http://hl7.org/fhir"
>
  <!-- from Element: extension -->
 <id value="[id]"/><!-- 0..1 Logical id of this artifact -->
 <meta><!--  0..1 Meta Metadata about the resource --></meta>
 <implicitRules value="[uri]"/><!--  0..1 A set of rules under which this content was created -->
 <language value="[code]"/><!--  0..1 Language of the resource content   -->
 <text><!--  0..1 Narrative Text summary of the resource, for human interpretation --></text>
 <contained><!--  0..* Resource Contained, inline Resources --></contained>
 <modifierExtension><!--  0..* Extension  Extensions that cannot be ignored  --></modifierExtension>
 <identifier><!--  0..* Identifier Unique id --></identifier>
 <active value="[boolean]"/><!--  0..1 Whether this group's record is in active use -->
 <type value="[code]"/><!--  1..1 person | animal | practitioner | device | medication | substance   -->
 <actual value="[boolean]"/><!--  1..1 Descriptive or actual -->
 <code><!--  0..1 CodeableConcept Kind of Group members --></code>
 <name value="[string]"/><!--  0..1 Label for Group -->
 <quantity value="[unsignedInt]"/><!--  0..1 Number of members -->
 <managingEntity><!--  0..1 Reference(Organization) 
     Entity that is the custodian of the Group's definition --></managingEntity>
 <characteristic>  0..0 BackboneElement  <!--  0..0 Include / Exclude group members by Trait -->
 </characteristic>
 <member>  0..* BackboneElement  <!--  0..* Who or what is in group -->
  <modifierExtension><!--  0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
  <entity><!--  1..1 Reference(Patient) Reference to the group member --></entity>
  <period><!--  0..1 Period Period member belonged to the group --></period>
  <inactive value="[boolean]"/><!--  0..1 If member is no longer in group -->
 </member>
</Group>

{ // Actual Group
  // from Element: extension
    "meta" : { Meta }, // C?Metadata about the resource
    "implicitRules" : "<uri>", // C?A set of rules under which this content was created
    "language" : "<code>", // C?Language of the resource content
    "text" : { Narrative }, // C?Text summary of the resource, for human interpretation
    "contained" : [{ Resource }], // C?Contained, inline Resources
    "modifierExtension" : [{ Extension }], // C?Extensions that cannot be ignored
    "identifier" : [{ Identifier }], // C?Unique id
    "active" : <boolean>, // C?Whether this group's record is in active use
    "type" : "<code>", // C? R! person | animal | practitioner | device | medication | substance
    "actual" : true, // C? R! 
    "code" : { CodeableConcept }, // C?Kind of Group members
    "name" : "<string>", // C?Label for Group
    "quantity" : "<unsignedInt>", // C?Number of members
    "managingEntity" : { Reference(Organization) }, // C?Entity that is the custodian of the Group's definition
    "member" : [{ BackboneElement }] // C?Who or what is in group
  }

Summary

Mandatory: 1 element
Fixed Value: 1 element
Prohibited: 1 element

<!-- Actual Group -->

<Group xmlns="http://hl7.org/fhir"
>
  <!-- from Element: extension -->
 <id value="[id]"/><!-- 0..1 Logical id of this artifact -->
 <meta><!--  0..1 Meta Metadata about the resource --></meta>
 <implicitRules value="[uri]"/><!--  0..1 A set of rules under which this content was created -->
 <language value="[code]"/><!--  0..1 Language of the resource content   -->
 <text><!--  0..1 Narrative Text summary of the resource, for human interpretation --></text>
 <contained><!--  0..* Resource Contained, inline Resources --></contained>
 <modifierExtension><!--  0..* Extension  Extensions that cannot be ignored  --></modifierExtension>
 <identifier><!--  0..* Identifier Unique id --></identifier>
 <active value="[boolean]"/><!--  0..1 Whether this group's record is in active use -->
 <type value="[code]"/><!--  1..1 person | animal | practitioner | device | medication | substance   -->
 <actual value="[boolean]"/><!--  1..1 Descriptive or actual -->
 <code><!--  0..1 CodeableConcept Kind of Group members --></code>
 <name value="[string]"/><!--  0..1 Label for Group -->
 <quantity value="[unsignedInt]"/><!--  0..1 Number of members -->
 <managingEntity><!--  0..1 Reference(Organization) 
     Entity that is the custodian of the Group's definition --></managingEntity>
 <characteristic>  0..0 BackboneElement  <!--  0..0 Include / Exclude group members by Trait -->
 </characteristic>
 <member>  0..* BackboneElement  <!--  0..* Who or what is in group -->
  <modifierExtension><!--  0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
  <entity><!--  1..1 Reference(Patient) Reference to the group member --></entity>
  <period><!--  0..1 Period Period member belonged to the group --></period>
  <inactive value="[boolean]"/><!--  0..1 If member is no longer in group -->
 </member>
</Group>

{ // Actual Group
  // from Element: extension
    "meta" : { Meta }, // C?Metadata about the resource
    "implicitRules" : "<uri>", // C?A set of rules under which this content was created
    "language" : "<code>", // C?Language of the resource content
    "text" : { Narrative }, // C?Text summary of the resource, for human interpretation
    "contained" : [{ Resource }], // C?Contained, inline Resources
    "modifierExtension" : [{ Extension }], // C?Extensions that cannot be ignored
    "identifier" : [{ Identifier }], // C?Unique id
    "active" : <boolean>, // C?Whether this group's record is in active use
    "type" : "<code>", // C? R! person | animal | practitioner | device | medication | substance
    "actual" : true, // C? R! 
    "code" : { CodeableConcept }, // C?Kind of Group members
    "name" : "<string>", // C?Label for Group
    "quantity" : "<unsignedInt>", // C?Number of members
    "managingEntity" : { Reference(Organization) }, // C?Entity that is the custodian of the Group's definition
    "member" : [{ BackboneElement }] // C?Who or what is in group
  }