dae xml { "type": "record", "doc":"This event records the sale of a product", "name": "ProductSaleEvent", "fields" : [ {"name":"time", "type":"long", "doc":"The time of the purchase"}, {"name":"customer_id", "type":"long", "doc":"The customer"}, {"name":"product_id", "type":"long", "doc":"The product"}, {"name":"quantity", "type":"int"}, {"name":"payment", "type":{"type":"enum", "name":"payment_types", "symbols":["cash","mastercard","visa"]}, "doc":"The method of payment"} ] }