TSG-Terminals Working Group 3 (USIM) #9	TdocT3-99308
Kyongju, Korea 4th – 6th Oct., 1999	

Title:	About an AID (Application Identifier)

Source:	NTT DoCoMo 

Status:	Discussion
_________________________________________________________________________

1.	Introduction
 Application Identifier (AID) is used to address an application in the card, as described in ISO/IEC 7816 series. 3GPP T-3 specification TS 31.101 also described AID.However, since it is not fully understandable, it needs to be clarified.

2.	Confirmation point
 In the TS 31.101 (Tdoc T3-99299) clause 8.5.3, AID is described as follows; “8.5.3 Selection by DF Name, An application represented in the UICC by the AID, shall be referenced by a DF name coded on 1 to 16 bytes. A DF name can be used in the SELECT command to select an application.” Here, it is ambiguous that what it means by DF name.

 Our understanding is that DF name is an application label according to ISO specification. However, ISO specification described as follows; “application label: A data for use at the man-machine interface. Direct application selection is performed by the use of the SELECT FILE command, specifying the AID as dedicated file name.”  On the other hand, in the TS 31.101 (Tdoc T3-99299) clause 14.3.2, it is described as follows; “An application may be selected, without reading the content of the EFDIR file, by performing the SELECT procedure with the AID of the application to be selected.”
 These  abbreviations are not clear.  

3.	Conclusion
 We think that an AID is used for application selection. Therefore AID is used in the SELECT FILE command. An application label is used for application indicate to user.
 Clarification of AID is necessary in this plenary in Korea.