{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/google-analytics/refs/heads/main/json-structure/admin-api-custom-dimension-structure.json",
  "name": "CustomDimension",
  "description": "A definition for a CustomDimension.",
  "type": "object",
  "properties": {
    "description": {
      "description": "Optional. Description for this custom dimension. Max length of 150 characters.",
      "type": "string"
    },
    "disallowAdsPersonalization": {
      "description": "Optional. If set to true, sets this dimension as NPA and excludes it from ads personalization. This is currently only supported by user-scoped custom dimensions.",
      "type": "boolean"
    },
    "displayName": {
      "description": "Required. Display name for this custom dimension as shown in the Analytics UI. Max length of 82 characters, alphanumeric plus space and underscore starting with a letter. Legacy system-generated display names may contain square brackets, but updates to this field will never permit square brackets.",
      "type": "string"
    },
    "name": {
      "description": "Output only. Resource name for this CustomDimension resource. Format: properties/{property}/customDimensions/{customDimension}",
      "readOnly": true,
      "type": "string"
    },
    "parameterName": {
      "description": "Required. Immutable. Tagging parameter name for this custom dimension. If this is a user-scoped dimension, then this is the user property name. If this is an event-scoped dimension, then this is the event parameter name. If this is an item-scoped dimension, then this is the parameter name found in the eCommerce items array. May only contain alphanumeric and underscore characters, starting with a letter. Max length of 24 characters for user-scoped dimensions, 40 characters for event-scoped dimensions.",
      "type": "string"
    },
    "scope": {
      "description": "Required. Immutable. The scope of this dimension.",
      "enum": [
        "DIMENSION_SCOPE_UNSPECIFIED",
        "EVENT",
        "USER",
        "ITEM"
      ],
      "type": "string"
    }
  }
}