This report defines interoperability; identifies key information needed by public agencies to implement smartcard payment systems interoperability; describes the necessary information flows; and outlines a set of functions needed for a standard public domain application programming interface (API) that may be used in the development of a uniform application protocol data unit (APDU). The report includes a prototype for an API and an APDU that demonstrates this 'proof of concept' for International Organization for Standardization (ISO)-compliant Type A and Type B cards. The report is intended for use by transit decision makers and practitioners to help guide them through the creation and implementation of interoperable smartcard payment systems. Agencies at varying points of creating and implementing an interoperable transit smartcard system will find this helpful. (Author/publisher)
Abstract