Application Level Events (ALE) is a standard created by EPCGlobal, Inc., an organization of industry leaders devoted to the development of standards for the Electronic Product Code (EPC) and Radio Frequency Identification (RFID) technologies. The ALE specification is a software specification indicating required functionality and behavior, as well as a common API expressed through XML Schema Definition (XSD) and Web Services Description Language (WSDL). The behavior expressed through the ALE..