And the fids efs located underneath start with

258	Smart Card Operating Systems

File names according to ISO/IEC 7816-4

names will be the only type of file addressing used in smart cards with microcontrollers. With memory cards, on the other hand, physical file addressing will continue to be used for the foreseeable future.

File identifier (FID)

Table 5.6
	Name and purpose	Standard
	This FID is reserved for EFDIR (directory) file, which is used to

'2F01'	This FID is reserved for EFATR, which contains extensions

		ISO/IEC 7816-4,

GSM 11.11,
TS 102.221,
EMV

'3FFF'		ISO/IEC 7816-4
		ISO/IEC 7816-4

5.6	Smart Card Files	259

the first (more significant) byte. The FIDs of EFs located directly below the MF have'2F'as the first byte, and the FIDs of EFs located underneath a DF start with'6F'. The less significant bytes are numbered sequentially. This specification applies only to the GSM application and is not a general standard. In other situations, the full 2-byte address region of the FID can be fully exploited and is not subject to any restrictions.

Table 5.7	Example of a typical structure of an EFDIR file per ISO/IEC 7816-4 and ISO/IEC 7816-5, as
specified for the UICC
EFDIR
Description:
File:

to the administrator

Record coding:	byte 1:	'61'(‘application template’ tag)
	byte 2:
	byte 3:
	byte 4:
	byte 5– n:

byte n + 1:
byte n + 2:
byte n + 3– m:

'50'(‘application label’ tag)
length of the application label
application label in ASCII (1–16)

Example:
Example: