{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "/schemas/3.1.0-rc.4/core/requirements/offering-asset-constraint.json",
  "title": "Offering Asset Constraint",
  "description": "Declares per-group creative requirements that each offering must satisfy. Allows formats to specify what asset groups (headlines, images, videos) offerings must provide, along with count and per-asset technical constraints.",
  "type": "object",
  "properties": {
    "asset_group_id": {
      "type": "string",
      "description": "The asset group this constraint applies to. Values are format-defined vocabulary — each format chooses its own group IDs (e.g., 'headlines', 'images', 'videos'). Buyers discover them via list_creative_formats."
    },
    "asset_type": {
      "$ref": "/schemas/3.1.0-rc.4/enums/asset-content-type.json",
      "description": "The expected content type for this group."
    },
    "required": {
      "type": "boolean",
      "description": "Whether this asset group must be present in each offering. Defaults to true.",
      "default": true
    },
    "min_count": {
      "type": "integer",
      "minimum": 1,
      "description": "Minimum number of items required in this group."
    },
    "max_count": {
      "type": "integer",
      "minimum": 1,
      "description": "Maximum number of items allowed in this group."
    },
    "asset_requirements": {
      "$ref": "/schemas/3.1.0-rc.4/core/requirements/asset-requirements.json",
      "description": "Technical requirements for each item in this group (e.g., max_length for text, min_width/aspect_ratio for images). Applies uniformly to all items in the group."
    },
    "ext": {
      "$ref": "/schemas/3.1.0-rc.4/core/ext.json"
    }
  },
  "required": ["asset_group_id", "asset_type"],
  "additionalProperties": true,
  "examples": [
    {
      "description": "Headline constraint with count bounds",
      "data": {
        "asset_group_id": "headlines",
        "asset_type": "text",
        "required": true,
        "min_count": 3,
        "max_count": 15
      }
    },
    {
      "description": "Landscape image constraint with count bounds",
      "data": {
        "asset_group_id": "images_landscape",
        "asset_type": "image",
        "required": true,
        "min_count": 1,
        "max_count": 20
      }
    }
  ]
}