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Table of Contents - APTAStandards.com

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4.8-3 APTA System<br />

Header<br />

Field Name Description<br />

SettlementDate Current<br />

settlement date <strong>of</strong> the system.<br />

ReconciliationDate Agency operation date<br />

Hostname Host<br />

name <strong>of</strong> the Site Computer that<br />

receives<br />

transaction from the Picc Device<br />

AcquirerId The Unique ID <strong>of</strong> the Acquirer involved in<br />

the transaction.<br />

4.8.3.2 APTA System Common Header<br />

This<br />

is the <strong>com</strong>mon header structu re that immediately follows the System Header in<br />

every UD message. UD is defined as “Usage Data” in the context <strong>of</strong> the ERG<br />

specifications.<br />

Exhibit 4.8-4 APTA System Common Header<br />

Field Name Description<br />

formatVersion Format version (ie structure) <strong>of</strong> the usage data<br />

payload. This field is updated every time a new<br />

structure definition is released.<br />

The formatVersion <strong>of</strong> this APTA Data Definition<br />

is: 0x000001<br />

txnDateTime The time (in seconds) at which the UD record is<br />

generated. Format is Unix Time_t (UTC 0) i.e. 0 =<br />

1/1/1970,<br />

00:00:00 UTC.<br />

BusinessDate The Business Date on which this UD record was<br />

generated<br />

sourceParticipantId The Unique ID <strong>of</strong> the Operator associated with<br />

the Picc device on which the UD transaction<br />

is<br />

generated.<br />

DeviceId A unique number<br />

assigned to each device<br />

SamId The numeric identification <strong>of</strong> the Security Access<br />

Module (SAM) used in the transaction. This field<br />

is 0 if no sam was involved.<br />

This field should be used to identify the source<br />

device <strong>of</strong> the transaction since it is<br />

the SAM that<br />

MACs the transaction. A mapping between<br />

SamId and deviceId could be maintained<br />

by<br />

Page 60

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