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FHIR Infrastructure Work GroupMaturity Level: N/AStandards Status: Informative Compartments: Not linked to any defined compartments

This is a representation of the json schema for Topic, which is just a part of the full JSON Schema.

{
  "$schema": "http://json-schema.org/draft-06/schema#",
  "id": "http://hl7.org/fhir/json-schema/Topic",
  "$ref": "#/definitions/Topic",
  "description": "see http://hl7.org/fhir/json.html#schema for information about the FHIR Json Schemas",
  "definitions": {
    "Topic": {
      "description": "Describes a stream of resource state changes identified by trigger criteria and annotated with labels useful to filter projections from this topic.",
      "properties": {
        "resourceType": {
          "description": "This is a Topic resource",
          "const": "Topic"
        },
        "id": {
          "description": "The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.",
          "$ref": "id.schema.json#/definitions/id"
        },
        "meta": {
          "description": "The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.",
          "$ref": "Meta.schema.json#/definitions/Meta"
        },
        "implicitRules": {
          "description": "A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.",
          "$ref": "#/definitions/uri"
        },
        "_implicitRules": {
          "description": "Extensions for implicitRules",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "language": {
          "description": "The base language in which the resource is written.",
          "$ref": "#/definitions/code"
        },
        "_language": {
          "description": "Extensions for language",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "text": {
          "description": "A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it \"clinically safe\" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.",
          "$ref": "Narrative.schema.json#/definitions/Narrative"
        },
        "contained": {
          "description": "These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.",
          "items": {
            "$ref": "ResourceList.schema.json#/definitions/ResourceList"
          },
          "type": "array"
        },
        "extension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "modifierExtension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element\u0027s descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "url": {
          "description": "An absolute URL that is used to identify this Topic when it is referenced in a specification, model, design or an instance. This SHALL be a URL, SHOULD be globally unique, and SHOULD be an address at which this Topic is (or will be) published. The URL SHOULD include the major version of the Topic. For more information see [Technical and Business Versions](resource.html#versions).",
          "$ref": "#/definitions/uri"
        },
        "_url": {
          "description": "Extensions for url",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "identifier": {
          "description": "Business identifiers assigned to this Topic by the performer and/or other systems.  These identifiers remain constant as the resource is updated and propagates from server to server.",
          "items": {
            "$ref": "Identifier.schema.json#/definitions/Identifier"
          },
          "type": "array"
        },
        "version": {
          "description": "The identifier that is used to identify this version of the Topic when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the Topic author and is not expected to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available. There is also no expectation that versions are orderable.",
          "$ref": "#/definitions/string"
        },
        "_version": {
          "description": "Extensions for version",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "title": {
          "description": "A short, descriptive, user-friendly title for the Topic, for example, \"admission\".",
          "$ref": "#/definitions/string"
        },
        "_title": {
          "description": "Extensions for title",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "derivedFromCanonical": {
          "description": "The canonical URL pointing to another FHIR-defined Topic that is adhered to in whole or in part by this Topic.",
          "items": {
            "$ref": "canonical.schema.json#/definitions/canonical"
          },
          "type": "array"
        },
        "derivedFromUri": {
          "description": "The URL pointing to an externally-defined subscription topic or other definition that is adhered to in whole or in part by this definition.",
          "items": {
            "$ref": "#/definitions/uri"
          },
          "type": "array"
        },
        "_derivedFromUri": {
          "description": "Extensions for derivedFromUri",
          "items": {
            "$ref": "Element.schema.json#/definitions/Element"
          },
          "type": "array"
        },
        "status": {
          "description": "The current state of the Topic.",
          "enum": [
            "draft",
            "active",
            "retired",
            "unknown"
          ]
        },
        "_status": {
          "description": "Extensions for status",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "experimental": {
          "description": "A flag to indicate that this Topic is authored for testing purposes (or education/evaluation/marketing), and is not intended to be used for genuine usage.",
          "$ref": "#/definitions/boolean"
        },
        "_experimental": {
          "description": "Extensions for experimental",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "date": {
          "description": "For draft definitions, indicates the date of initial creation.  For active definitions, represents the date of activation.  For withdrawn definitions, indicates the date of withdrawal.",
          "$ref": "#/definitions/dateTime"
        },
        "_date": {
          "description": "Extensions for date",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "publisher": {
          "description": "Helps establish the \"authority/credibility\" of the Topic.  May also allow for contact.",
          "$ref": "Reference.schema.json#/definitions/Reference"
        },
        "contact": {
          "description": "Contact details to assist a user in finding and communicating with the publisher.",
          "items": {
            "$ref": "ContactDetail.schema.json#/definitions/ContactDetail"
          },
          "type": "array"
        },
        "description": {
          "description": "A free text natural language description of the Topic from the consumer\u0027s perspective.",
          "$ref": "#/definitions/markdown"
        },
        "_description": {
          "description": "Extensions for description",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "useContext": {
          "description": "The content was developed with a focus and intent of supporting the contexts that are listed. These terms may be used to assist with indexing and searching of code system definitions.",
          "items": {
            "$ref": "UsageContext.schema.json#/definitions/UsageContext"
          },
          "type": "array"
        },
        "jurisdiction": {
          "description": "A jurisdiction in which the Topic is intended to be used.",
          "items": {
            "$ref": "CodeableConcept.schema.json#/definitions/CodeableConcept"
          },
          "type": "array"
        },
        "purpose": {
          "description": "Explains why this Topic is needed and why it has been designed as it has.",
          "$ref": "#/definitions/markdown"
        },
        "_purpose": {
          "description": "Extensions for purpose",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "copyright": {
          "description": "A copyright statement relating to the Topic and/or its contents. Copyright statements are generally legal restrictions on the use and publishing of the Topic.",
          "$ref": "#/definitions/markdown"
        },
        "_copyright": {
          "description": "Extensions for copyright",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "approvalDate": {
          "description": "The date on which the asset content was approved by the publisher. Approval happens once when the content is officially approved for usage.",
          "$ref": "#/definitions/date"
        },
        "_approvalDate": {
          "description": "Extensions for approvalDate",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "lastReviewDate": {
          "description": "The date on which the asset content was last reviewed. Review happens periodically after that, but doesn\u0027t change the original approval date.",
          "$ref": "#/definitions/date"
        },
        "_lastReviewDate": {
          "description": "Extensions for lastReviewDate",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "effectivePeriod": {
          "description": "The period during which the Topic content was or is planned to be effective.",
          "$ref": "Period.schema.json#/definitions/Period"
        },
        "resourceTrigger": {
          "description": "The criteria for including updates to a nominated resource in the topic.  Thie criteria may be just a human readable description and/or a full FHIR search string or FHIRPath expression.",
          "$ref": "#/definitions/Topic_ResourceTrigger"
        },
        "canFilterBy": {
          "description": "List of properties by which Subscriptions on the topic can be filtered.",
          "items": {
            "$ref": "#/definitions/Topic_CanFilterBy"
          },
          "type": "array"
        }
      },
      "additionalProperties": false,
      "required": [
        "resourceType"
      ]
    },
    "Topic_ResourceTrigger": {
      "description": "Describes a stream of resource state changes identified by trigger criteria and annotated with labels useful to filter projections from this topic.",
      "properties": {
        "id": {
          "description": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
          "$ref": "string.schema.json#/definitions/string"
        },
        "extension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "modifierExtension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element\u0027s descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "description": {
          "description": "The human readable description of what triggers inclusion into this topic -  for example, \"Beginning of a clinical encounter\".",
          "$ref": "#/definitions/string"
        },
        "_description": {
          "description": "Extensions for description",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "resourceType": {
          "description": "The list of resource types that are candidates for this topic.  For example, the Encounter resource is updated in an \u0027admission\u0027 topic.",
          "items": {
            "$ref": "#/definitions/code"
          },
          "type": "array"
        },
        "_resourceType": {
          "description": "Extensions for resourceType",
          "items": {
            "$ref": "Element.schema.json#/definitions/Element"
          },
          "type": "array"
        },
        "methodCriteria": {
          "description": "The REST interaction based rules that the server should use to determine when to trigger a notification for this topic.",
          "items": {
            "$ref": "#/definitions/code"
          },
          "type": "array"
        },
        "_methodCriteria": {
          "description": "Extensions for methodCriteria",
          "items": {
            "$ref": "Element.schema.json#/definitions/Element"
          },
          "type": "array"
        },
        "queryCriteria": {
          "description": "The FHIR query based rules that the server should use to determine when to trigger a notification for this topic.",
          "$ref": "#/definitions/Topic_QueryCriteria"
        },
        "fhirPathCriteria": {
          "description": "The FHIRPath based rules that the server should use to determine when to trigger a notification for this topic.",
          "$ref": "#/definitions/string"
        },
        "_fhirPathCriteria": {
          "description": "Extensions for fhirPathCriteria",
          "$ref": "Element.schema.json#/definitions/Element"
        }
      },
      "additionalProperties": false
    },
    "Topic_QueryCriteria": {
      "description": "Describes a stream of resource state changes identified by trigger criteria and annotated with labels useful to filter projections from this topic.",
      "properties": {
        "id": {
          "description": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
          "$ref": "string.schema.json#/definitions/string"
        },
        "extension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "modifierExtension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element\u0027s descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "previous": {
          "description": "The FHIR query based rules are applied to the previous resource state.",
          "$ref": "#/definitions/string"
        },
        "_previous": {
          "description": "Extensions for previous",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "current": {
          "description": "The FHIR query based rules are applied to the current resource state.",
          "$ref": "#/definitions/string"
        },
        "_current": {
          "description": "Extensions for current",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "requireBoth": {
          "description": "If set to true, both current and previous criteria must evaluate true to  trigger a notification for this topic.  Otherwise a notification for this topic will be triggered if either one evaluates to true.",
          "$ref": "#/definitions/boolean"
        },
        "_requireBoth": {
          "description": "Extensions for requireBoth",
          "$ref": "Element.schema.json#/definitions/Element"
        }
      },
      "additionalProperties": false
    },
    "Topic_CanFilterBy": {
      "description": "Describes a stream of resource state changes identified by trigger criteria and annotated with labels useful to filter projections from this topic.",
      "properties": {
        "id": {
          "description": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
          "$ref": "string.schema.json#/definitions/string"
        },
        "extension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "modifierExtension": {
          "description": "May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element\u0027s descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
          "items": {
            "$ref": "Extension.schema.json#/definitions/Extension"
          },
          "type": "array"
        },
        "name": {
          "description": "A search parameter (like \"patient\") which is a label for the filter.",
          "$ref": "#/definitions/string"
        },
        "_name": {
          "description": "Extensions for name",
          "$ref": "Element.schema.json#/definitions/Element"
        },
        "matchType": {
          "description": "Allowable operators to apply when determining matches (Search Modifiers).",
          "items": {
            "enum": [
              "\u003d",
              "in",
              "not-in",
              "above",
              "below"
            ]
          },
          "type": "array"
        },
        "_matchType": {
          "description": "Extensions for matchType",
          "items": {
            "$ref": "Element.schema.json#/definitions/Element"
          },
          "type": "array"
        },
        "documentation": {
          "description": "Description of how this filter parameter is intended to be used.",
          "$ref": "#/definitions/markdown"
        },
        "_documentation": {
          "description": "Extensions for documentation",
          "$ref": "Element.schema.json#/definitions/Element"
        }
      },
      "additionalProperties": false
    }
  }
}