App.cat
Content categories for the whole app, as taxonomy IDs in the scheme named by App.cattax. IAB Content Category Taxonomy 1.0 is assumed when no taxonomy is declared.
Field facts
- Path
app.cat- Object
- App
- Type
- string array
- Requirement
- Optional
- Added
- OpenRTB 2.0
- Spec section
- 3.2.14
How it is used
Store categories are not taxonomy IDs. Map the app's store category to an ID from the declared taxonomy before sending it, and keep the raw store label in an extension if a partner asks for it.
Example
Where the field sits in a payload, with everything else left out:
{
"id": "req-1",
"app": {
"cat": [
"IAB9-30"
]
}
}Common mistakes
- Sending store category names such as "Games" or "Puzzle" instead of taxonomy IDs.
- Sending Content Taxonomy 2.x or 3.x IDs without setting
App.cattax, so buyers look them up in the 1.0 list.
Version history
Added in OpenRTB 2.0, and present in the latest snapshot. The table shows how each version's spec text types the field.
| Versions | Type in the spec | Required | Deprecated |
|---|---|---|---|
| 2.0 to 2.1 | array of string | No | No |
| 2.2 | array of strings | No | No |
| 2.3 to 2.3.1 | string array | No | No |
| 2.4 | string array | No | No |
| 2.5 to 2.6-202606 | string array | No | No |