The MapEntry.Key’s data is a Buffer that contains a combination of the price and order side, thus each key is unique within its map. The MapEntry.Key’s data should be treated as a single entity and is not meant to be parsed.
MapEntry.Data is a FieldList that contains some or all of the following information about the price point:
• Order Price & Side (BID, ASK, or ORDER_PRC and ORDER_SIDE)
• Order Size (BIDSIZE, ASKSIZE, or ORDER_SIZE)
• Number of aggregated orders (NO_ORD)
• Quote Time (QUOTIM_MS)
• A map containing the Market Makers (MMID) and optionally a field list with each of the market makers’ positions at the Order Price point.