Control messages are provided to update systems with notification of significant CME Group status changes and to test system integrity.
Control messages will consist of a standard Header including a Category Code and a Type Code, which explicitly identifies the system control message. The text of a control message will consist of 46 P/A Characters, plus a 47th ETX control character, and contain a specified message structure, which is subject to processing by systems.
The following sample message contains Category Code C - Control Messages:
aM ACDA00000011330010GbSTART OF OFFICIAL TRANSMISSIONS 041011 133001c
Position | Name | Length | Sample Values | Description | Type |
|---|---|---|---|---|---|
1 | SOH control character | (1) | Binary representation of the number 1 | Control Character | Message Header |
2 - 3 | Exchange ID | (2) | ‘M ‘ | Exchange | Message Header |
4 - 5 | Vendor ID | (2) | ‘ ‘ | Vendor | Message Header |
6 | Product Classification Code | (1) | A | Product type
| Message Header |
7 | Category Code | (1) | C | Message type | Message Header |
8 | Type Code | (1) | D | Message Type Code
| Message Header |
9 | Message Day Code | (1) | A | Day of month | Message Header |
10 - 16 | Message Sequence Number | (7) | 0000001 | Sequence number | Message Header |
17 - 23 | Message Time Stamp | (7) | 1330010 | Time will be represented as ‘HHMMSST’ for the time zone in which the exchange is located | Message Header |
24 | Session ID | (1) | G
| Session ID | Message Header |
25 | STX control character | (1) | Binary representation of the number 2 | Control Character | Message Header |
26-58 | Admin Message | (33) | START OFOFFICI AL TRANSMISSION |
| Message Body |
59-64 | Date | (6) | 041011 | Transmission Date | Message Body |
65 | Space | (1) | ‘ ‘ | Blank | Message Body |
66-71 | Time | (1) | 133001 | Message Transmission Time | Message Body |
72 | ETX | (1) | Binary representation of the number 3 | Control character | Message Body |