attachmentItem

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/microsoft.graph.attachmentItem",
  "title": "attachmentItem",
  "required": [
    "@odata.type"
  ],
  "type": "object",
  "properties": {
    "attachmentType": {
      "anyOf": [
        {
          "$ref": "#/components/schemas/microsoft.graph.attachmentType"
        },
        {
          "type": "object",
          "nullable": true
        }
      ],
      "description": "The type of attachment. The possible values are: file, item, reference. Required."
    },
    "contentId": {
      "type": "string",
      "description": "The CID or Content-Id of the attachment for referencing for the in-line attachments using the <img src='cid:contentId'> tag in HTML messages. Optional.",
      "nullable": true
    },
    "contentType": {
      "type": "string",
      "description": "The nature of the data in the attachment. Optional.",
      "nullable": true
    },
    "isInline": {
      "type": "boolean",
      "description": "true if the attachment is an inline attachment; otherwise, false. Optional.",
      "nullable": true
    },
    "name": {
      "type": "string",
      "description": "The display name of the attachment. This can be a descriptive string and doesn't have to be the actual file name. Required.",
      "nullable": true
    },
    "size": {
      "type": "number",
      "description": "The length of the attachment in bytes. Required.",
      "format": "int64",
      "nullable": true
    },
    "@odata.type": {
      "type": "string"
    }
  }
}