A criterion to represent a single item group rule in Vertical Ads.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/common/criteria.proto)

| Fields ||
|---|---|
| ## `dimension` Union field. Each value represents a dimension for which we can set an item group rule. `dimension` can be only one of the following: ||
| ### `city_criterion_id` | `string` The resource name of the Geo Target Constant for the city. |
| ### `country_criterion_id` | `string` The resource name of the Geo Target Constant for the country. |
| ### `event_participant_display_name` | `string` The name of an associated participant for a given event. For example, headliner for a concert event. |
| ### `hotel_class` | `int64` Integer value specifying the class rating for a hotel. Ranges from 1 to 5 stars. |
| ### `item_code` | `string` The id specifying a particular Vertical Ad listing. |
| ### `region_criterion_id` | `string` The resource name of the Geo Target Constant for the region. |
| ### `user_rating` | `int64` Integer value specifying the user rating for a Vertical Ad listing. Ranges from 1 to 5, where 5 is the best. |
| ### `venue` | `string` A name for a specific location, like the venue for a concert event. |