type: object

description: >-
  As mail pieces travel through the mail stream, USPS scans their unique
  barcodes, and Lob processes these mail scans to generate tracking events.

required:
  - id
  - date_created
  - date_modified
  - object

properties:
  id:
    $ref: "../attributes/evnt_id.yml"

  time:
    type: string
    format: date-time
    description: >-
      A timestamp in ISO 8601 format of the date USPS registered the event.

  date_created:
    $ref: "../../../attributes/timestamps.yml#/date_created"

  date_modified:
    $ref: "../../../attributes/timestamps.yml#/date_modified"

  object:
    allOf:
      - $ref: "../../../attributes/object.yml"
      - type: string
        enum:
          - tracking_event
        default: tracking_event