{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Subscription",
  "description": "The subscription resource is used to define a push-based subscription from a server to another system. Once a subscription is registered with the server, the server checks every resource that is created or updated, and if the resource matches the given criteria, it sends a message on the defined \"channel\" so that another system can take an appropriate action.",
  "x-source": "https://api.medplum.com/openapi.json",
  "properties": {
    "resourceType": {
      "description": "This is a Subscription resource",
      "type": "string"
    },
    "id": {
      "description": "The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.",
      "$ref": "#/components/schemas/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.",
      "$ref": "#/components/schemas/Meta"
    },
    "implicitRules": {
      "description": "A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.",
      "$ref": "#/components/schemas/uri"
    },
    "language": {
      "description": "The base language in which the resource is written.",
      "$ref": "#/components/schemas/code"
    },
    "text": {
      "description": "A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it \"clinically safe\" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.",
      "$ref": "#/components/schemas/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": {
        "$ref": "#/components/schemas/ResourceList"
      },
      "type": "array"
    },
    "extension": {
      "description": "May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "items": {
        "$ref": "#/components/schemas/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's 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": {
        "$ref": "#/components/schemas/Extension"
      },
      "type": "array"
    },
    "status": {
      "description": "The status of the subscription, which marks the server state for managing the subscription.",
      "enum": [
        "requested",
        "active",
        "error",
        "off"
      ]
    },
    "contact": {
      "description": "Contact details for a human to contact about the subscription. The primary use of this for system administrator troubleshooting.",
      "items": {
        "$ref": "#/components/schemas/ContactPoint"
      },
      "type": "array"
    },
    "end": {
      "description": "The time for the server to turn the subscription off.",
      "$ref": "#/components/schemas/instant"
    },
    "reason": {
      "description": "A description of why this subscription is defined.",
      "$ref": "#/components/schemas/string"
    },
    "criteria": {
      "description": "The rules that the server should use to determine when to generate notifications for this subscription.",
      "$ref": "#/components/schemas/string"
    },
    "error": {
      "description": "A record of the last error that occurred when the server processed a notification.",
      "$ref": "#/components/schemas/string"
    },
    "channel": {
      "description": "Details where to send notifications when resources are received that meet the criteria.",
      "$ref": "#/components/schemas/Subscription_Channel"
    }
  },
  "additionalProperties": false,
  "required": [
    "channel",
    "resourceType"
  ]
}