interface serves as a tagging interface to indicate that the applet supports extended length APDU. If this interface is implemented by the applet instance, the applet may receive and send up to 32767 bytes of APDU data. </p><p> The APDU command header in the APDU buffer will use the variable length header defined in ISO7816-4 with a 3 byte Lc value when the Lc field in the incoming APDU header is 3 bytes long. The incoming data in that case will begin at APDU buffer offset 7. </p><p> See Runtime Environment Specification for the Java Card Platform for details.