AWS Documentation Amazon DynamoDB Developer Guide. … Note that Id is a numeric type attribute, and all other attributes are of the string type. Authors is a String set. Specifying Optional Parameters. You can also provide optional parameters using the PutItemRequest object as shown in the following C# example. The example specifies the …
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LowLevelDotNetItemCRUD.html

