EMV Transaction Flow

 Command to Get Processing Options:

Cla: 80 - command class
Ins: A8 - instruction code
P1: 00
P2: 00
Lc: 14 - length of the data field
Data: 831236A0400000000000140036D3EC3906430643 - data field with tag 83 containing the concatenation of values in the same order as they are listed in the PDOL element of the command to SELECT RESPONSE. 
Let us look into them in the same order as they are set out in the example:
Tag 9F66: Terminal Transaction Qualifiers: 36A04000 - the terminal tells about the card and its functionality.

Tag 9F02: Transaction Amount: 000000000100 - amount of the transaction. 1.00 rupees.

Tag 9F37: Unpredictable Number: 36D3CE38 - random number generated by the terminal.

Tag 5F2A: Terminal Country Code: 0524 - code of the transaction currency, Nepalese Rupee

Tag 9F1A: Terminal Country Code: 0524 - country of the terminal, Nepal

The Card's Response to the command to GPO follows:

example:

Response: 774C8202200057134704340000172834D21122011676600000671F5F2002202F5F3401019F100706011103A000009F2608A4933D887F0065CE9F2701809F3602004E9F6C023E009F6E04207000009000

Tag 77: Response Message Template Format 2 - format of the data presentation in the response

Tag 82: Application Interchange Profile: 2000 - profile of the card application where its functionality is described. 

Tag 57: Track 2 Equivalent Data: 4804123456789004D23122011676600000671F - equivalent of the magnetic stripe's second track. its structure includes:

• PAN = 4804123456789004 - card number
• Separator field = D - separator
• Expiry Date = 23/12 - card expiry date.  Through December 2023.
• Service Code = 201 - service code.
• Discretionary Data = 1676600000671F - discretionary data where the CVV/CVV2 can be encoded.

Tag 5F20: Cardholder Name: 202F - name of the cardholder.

Tag 5F34: Application PAN Sequence Number: 01 - sequence number of the card. its initial purpose was to be used in the profiles that have more than one application on one physical card. Currently, it is often used in cryptographic procedures related to card authenticity verification by the issuer's host.

Tag 9F10: Issuer Application Data: 06011103A00000 - data of the card application. its structure includes:

• Length Indicator = 06
• Derivation Key Index = 01
• Cryptogram Version Number = 11
• Card Verification Results (CVR) = 03A00000 - dynamic object based on the previous steps of exchange within the transaction. 

Tag 9F26: Application Cryptogram (AC): A4933D887F0065CE

Tag 9F27: Cryptogram Information Data (CID): 80

Tag 9F36: Application Transaction Counter (ATC): 004E - card transactions counter. Digital value: 78.

Tag 9F6C: Card Transaction Qualifiers: 3E00  - CTQ describing the card capabilities.

Tag 9F6E: Form Factor Indicator: 20700000 - the object describes the technological type of this particular mean of payment.