AWS::Lambda::EventSourceMapping:

Properties: 
  BatchSize: "\"The largest number of records that Lambda retrieves from your event source when invoking your function. Your function receives an event with all the retrieved records. Valid range: Minimum value of 1. Maximum value of 10000.\""
  Enabled: "\"Indicates whether Lambda begins polling the event source.\""
  EventSourceArn: "\"The Amazon Resource Name (ARN) of the Amazon Kinesis or DynamoDB stream that is the source of events. Any record added to this stream can invoke the Lambda function.\""
  FunctionName: "\"The name or ARN of a Lambda function to invoke when Lambda detects an event on the stream.\""
  StartingPosition: "\"The position in the stream where Lambda starts reading.  Valid Values: TRIM_HORIZON | LATEST\""