UNILIN-UNIMAT: Control Records

T.0 Control Record

Purpose: Used by the receiving system to check whether the following control block is valid.
Valid for: Every new block of data added to the payload.
What happens when the row is read: The row starts a new control block. The declared record count is compared with the number of rows that follow in that block.
If the count matches: The block is structurally valid and processing may continue.
If the count does not match: The payload is invalid and the block must be rejected.
Note: If a later mutation row does not contain its own business date, the control-record date and time define the block timestamp for that row set.

Fields:

Field Length Format Explanation

Field	Length	Format	Explanation
Mutation code	1	`0`	Always `0`.
Date	8	`YYYYMMDD`	Date when the following data was created.
Time	4	`HHMM`	Time when the following data was created.
Quantity of records	4	`(n-1) records`	Number of records following this control record in the same block, excluding the control record itself.

Mutation code

0

Always 0.

Date

YYYYMMDD

Date when the following data was created.

Time

HHMM

Time when the following data was created.

Quantity of records

(n-1) records

Number of records following this control record in the same block, excluding the control record itself.