Sequenced Unit Header
Sequenced Unit Header is used for all Cboe Titanium U.S. Options Opening Process Feed messages.
This feed will deliver only unsequenced data using the Sequenced Unit Header. Unsequenced headers will have a 0 value for the sequence field and unit field.
| Field | Offset | Length | Value/Type | Description |
|---|---|---|---|---|
| Hdr Length | 0 | 2 | Binary | Length of entire block of messages. Includes this header and Hdr Count messages to follow. |
| Hdr Count | 2 | 1 | Binary | Number of messages to follow this header. |
| Hdr Unit | 3 | 1 | Binary | Unit that applies to messages included in this header. |
| Hdr Sequence | 4 | 4 | Binary | Will be zero. |
| Total Length = 8 bytes | ||||