# Identifiers assigned by Gemini

<DocTable
  headers={["Tag", "Name", "Defined In", "Description"]}
  widths={["5%", "20%", "25%"]}
  rows={[
    [
      "49",
      "[SenderCompID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_49.html)",
      "[Standard Header](/trading/fix/overview/standard-header)",
      "Assigned value used to identify the firm **sending** the message.\n\n \u00A0 \n\n - From **Gemini to client:** `GEMINI` \n\n- From **client to Gemini:** your client identifier (e.g., `CLIENT-OE`)",
    ],
    [
      "56",
      "[TargetCompID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_56.html)",
      "[Standard Header](/trading/fix/overview/standard-header)",
      "Assigned value used to identify the firm **receiving** the message.\n\n- From **Gemini to client:** your client identifier (e.g., `CLIENT-OE`)\n- From **client to Gemini:** `GEMINI`",
    ],
    [
      "37",
      "[OrderID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_37.html)",
      "[Execution Report `<8>`](/trading/fix/order-entry/client-bound-messages/execution-report)\n[Order Cancel Reject `<9>`](/trading/fix/order-entry/client-bound-messages/order-cancel-reject)",
      "Globally unique **order identifier** assigned by Gemini, which remains constant throughout the order's lifecycle.\n\n \u00A0 \n\nWhen [ExecType `<150>`](https://www.onixs.biz/fix-dictionary/4.4/tagNum_150.html) = `0 = New` and [OrdStatus `<39>`](https://www.onixs.biz/fix-dictionary/4.4/tagNum_39.html) = `0 = New`, the order is considered **on the book**.\n\n \u00A0 \n\nFor an order cancel reject, the value is `NONE`.",
    ],
    [
      "17",
      "[ExecID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_17.html)",
      "[Execution Report `<8>`](/trading/fix/order-entry/client-bound-messages/execution-report)",
      "Globally unique **event identifier** assigned by Gemini. This ID can refer to:\n\n- Order accepted id (when the order is placed on the book)\n- Trade id (partial fill or fill)\n- Order cancellation id\n- Order rejection id",
    ],
  ]}
/>