cesium-native/Cesium3DTilesSelection/test/data/MaterialVariants/schema.json

{
  "classes": {
    "MaterialVariants": {
      "properties": {
        "material_variants": {
          "type": "STRING",
          "array": true,
          "description": "Names of material variants to be expected in the glTF assets",
          "semantic": "MATERIAL_VARIANTS"
        }
      }
    }
  }
}