NENA EIDO incident events

NENA is the National Emergency Number Association, the standards body for 9-1-1 and emergency communications. EIDO, the Emergency Incident Data Object, is NENA’s industry-standard format for exchanging emergency incident information between systems. GovWorx uses EIDO as the baseline format for the Connections Platform CAD interface. It gives CAD providers a shared, industry-neutral structure rather than requiring a GovWorx-specific payload. That makes the data easier to share with the systems an agency authorizes, while the agency remains in control of its data. An EIDO event is the recommended format for sending a complete CAD incident event to GovWorx. An EIDO event contains the incident’s complete current state. CAD sends a new event when the incident is created or materially changes. GovWorx compares the event with its existing record and applies the changes.

Send an EIDO event

Send the EIDO object in the data field of an incident-event envelope:

{
  "tenantId": 12345,
  "provider": "primary-cad-interface",
  "format": "nena-eido",
  "format_version": "1.0",
  "timestamp": "2026-08-26T20:14:31Z",
  "data": {
    "$id": "urn:emergency:uid:incidentid:01J6Z8Y4NQ:agency.example.gov",
    "lastUpdateTimeStamp": "2026-08-26T20:14:30Z",
    "updatedByAgencyReference": { "$ref": "urn:emergency:uid:agency:agency.example.gov" },
    "eidoVersion": "1.0",
    "issuingElementIdentification": "cad.agency.example.gov",
    "agencyComponent": [
      {
        "$id": "urn:emergency:uid:agency:agency.example.gov",
        "lastUpdateTimeStamp": "2026-08-26T20:14:30Z",
        "updatedByAgencyReference": { "$ref": "urn:emergency:uid:agency:agency.example.gov" },
        "agencyRoleDescriptionRegistryText": ["incidentOwner"],
        "incidentOwningAgencyIndicator": true,
        "agencyType": ["ems"]
      }
    ],
    "incidentComponent": {
      "$id": "urn:emergency:uid:eidodatacomponent:incident:agency.example.gov",
      "lastUpdateTimeStamp": "2026-08-26T20:14:30Z",
      "updatedByAgencyReference": { "$ref": "urn:emergency:uid:agency:agency.example.gov" },
      "internalIncidentId": "CAD-12345",
      "incidentTypeInternalCode": "MEDICAL",
      "incidentTypeInternalText": "Medical emergency",
      "incidentTypeCommonRegistryText": "medical",
      "incidentStatusInternalText": ["DISP"],
      "incidentStatusCommonRegistryText": ["dispatched"],
      "incidentPriorityInternalText": "high",
      "locationReference": [{ "$ref": "urn:emergency:uid:eidodatacomponent:location:agency.example.gov" }],
      "notesReference": [{ "$ref": "urn:emergency:uid:eidodatacomponent:note-1:agency.example.gov" }]
    },
    "locationComponent": [
      {
        "$id": "urn:emergency:uid:eidodatacomponent:location:agency.example.gov",
        "lastUpdateTimeStamp": "2026-08-26T20:14:30Z",
        "updatedByAgencyReference": { "$ref": "urn:emergency:uid:agency:agency.example.gov" },
        "locationTypeDescriptionRegistryText": "incidentLocation",
        "locationDescriptionText": "100 Main St, Denver, CO 80202"
      }
    ],
    "notesComponent": [
      {
        "$id": "urn:emergency:uid:eidodatacomponent:note-1:agency.example.gov",
        "lastUpdateTimeStamp": "2026-08-26T20:14:30Z",
        "updatedByAgencyReference": { "$ref": "urn:emergency:uid:agency:agency.example.gov" },
        "notesActionComments": "Caller reports chest pain."
      }
    ]
  }
}

The event must meet the EIDO schema. internalIncidentId identifies the CAD incident within the incident component. This example includes the required EIDO data references. Use the NENA schema below to validate the complete object.

Publish an incident event

Review the request envelope and the other supported event formats.

Other formats

EIDO is recommended, not required. A connector profile can define another CAD format and map it to the GovWorx incident model when the CAD cannot produce EIDO. Lifecycle signals such as incident.started, incident.canceled, and the asynchronous incident.linked fallback carry limited state. They do not replace a complete EIDO incident event for normal CAD updates.

NENA schema

GovWorx pins the NENA EIDO 1.0.1 normative schema for the CAD contract. NENA maintains the standard and its schema; GovWorx does not substitute a proprietary incident-data format for it. This portal links to that source rather than copying it. GovWorx reviews NENA releases and adopts them deliberately, with a published contract update, so integrations always know the EIDO version they are building against.

NENA standards

Learn about the National Emergency Number Association and the standards it maintains for 9-1-1.

NENA EIDO 1.0.1 schema

Review the normative EIDO schema maintained by NENA.

CAD integration

CAD API reference

NENA EIDO incident events

NENA EIDO incident events

Send an EIDO event

Publish an incident event

Other formats

NENA schema

NENA standards

NENA EIDO 1.0.1 schema

​NENA EIDO incident events

​Send an EIDO event

Publish an incident event

​Other formats

​NENA schema

NENA standards

NENA EIDO 1.0.1 schema

NENA EIDO incident events

Send an EIDO event

Other formats

NENA schema