Data Types

The following field types are used within the Sequenced Unit Header message header, GRP messages, and Cboe One Options feed.

• Alphanumeric fields are left justified ASCII fields and space padded on the right.
• Binary fields are unsigned and sized to Length bytes and ordered using Little Endian convention (least significant byte first).
• Binary 4.4 Price fields are unsigned Little Endian encoded 4 byte binary fields with 4 implied decimal places ( denominator = 10,000).
• Binary 8.4 Price fields are unsigned Little Endian encoded 8 byte binary fields with 4 implied decimal places ( denominator = 10,000).
• Printable ASCII fields are left justified ASCII fields that are space padded on the right that may include ASCII values in the range of 0x20 - 0x7e.