name : update-asset-model.rst **To update an asset model** The following ``update-asset-model`` example updates a wind farm asset model's description. This example includes the model's existing IDs and definitions, because ``update-asset-model`` overwrites the existing model with the new model. :: aws iotsitewise update-asset-model \ --cli-input-json file://update-wind-farm-model.json Contents of ``update-wind-farm-model.json``:: { "assetModelName": "Wind Farm Model", "assetModelDescription": "Represents a wind farm that comprises many wind turbines", "assetModelProperties": [ { "id": "a1b2c3d4-5678-90ab-cdef-88888EXAMPLE", "name": "Region", "dataType": "STRING", "type": { "attribute": {} } }, { "id": "a1b2c3d4-5678-90ab-cdef-99999EXAMPLE", "name": "Total Generated Power", "dataType": "DOUBLE", "unit": "kW", "type": { "metric": { "expression": "sum(power)", "variables": [ { "name": "power", "value": { "hierarchyId": "a1b2c3d4-5678-90ab-cdef-77777EXAMPLE", "propertyId": "a1b2c3d4-5678-90ab-cdef-66666EXAMPLE" } } ], "window": { "tumbling": { "interval": "1h" } } } } } ], "assetModelHierarchies": [ { "id": "a1b2c3d4-5678-90ab-cdef-77777EXAMPLE", "name": "Wind Turbines", "childAssetModelId": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE" } ] } Output:: { "assetModelId": "a1b2c3d4-5678-90ab-cdef-22222EXAMPLE", "assetModelArn": "arn:aws:iotsitewise:us-west-2:123456789012:asset-model/a1b2c3d4-5678-90ab-cdef-22222EXAMPLE", "assetModelStatus": { "state": "CREATING" } } For more information, see `Updating asset models <https://docs.aws.amazon.com/iot-sitewise/latest/userguide/update-assets-and-models.html#update-asset-models>`__ in the *AWS IoT SiteWise User Guide*.