# Aquis UK Enumerations

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The following fields have Enumerations:

* AGGRESSOR_SIDE - Indicates whether a trade resulted from an incoming buy or sell order.
* BOOK_TYPE - Type of order book or trading mechanism through which a trade was executed.
* MKT_PHASE - Indicates the instrument’s current market phase, as specified by the trading venue
* MMT_ALGO_IND - Identifies whether a trade involved an algorithmic order.
* MMT_BENCHMARK_IND - Identifies whether a trade was priced according to a defined benchmark (e.g. VWAP) or reference price (e.g. midpoint of the primary market BBO), or whether it was part of a trade in multiple instruments (contingent trade or portfolio trade).
* MMT_CROSS_IND - Identifies agency cross trades, where a broker crossed two client orders outside the order book.
* MMT_DEFERRAL_TYPE - Type of publication deferral or subsequent enrichment applied to a trade report.
* MMT_DIVIDEND_IND - Identifies whether a trade includes special dividend arrangements, e.g. a trade sold cum-dividend during an ex-dividend period.
* MMT_DUP_IND - Identifies trades reported to more than one Approved Publication Arrangement.
* MMT_MKT_MECH - Market mechanism through which a trade was executed.
* MMT_MOD_IND - Identifies trade cancellations, or amendments of a previous trade.
* MMT_NEGOTIATED_IND - Indicates privately negotiated trades, or Systematic Internaliser trades exempt from pre-trade transparency.
* MMT_OFF_BOOK_AUTO_IND - Identifies whether an off-book trade report was executed via a manual or automated process.
* MMT_PRICE_FORMING_IND - Identifies whether a trade is price-forming, or contributes to the price discovery process.
* MMT_PUB_MODE - Identifies whether a trade was subject to delayed publication, and the reason for the deferral.
* MMT_TRANS_CAT - Identifies various special categories of trade.
* MMT_TRD_MODE - Trading period during which an on-book trade was executed, or origin of an off-book trade report (on-exchange / off-exchange / SI).
* ORDER_TYPE - Type of order.
* TRADE_PERIOD - Market period during which a trade was executed.
* TRADE_TYPE - Type of trade
* TRADING_STATUS - Indicates whether the instrument is subject to a halt or suspension
* UPDATE_TYPE - Type of update

#### AGGRESSOR_SIDE - Enumeration

| Enumeration ID   | Enumeration Description                          |
|------------------|--------------------------------------------------|
| ‘””’             | Undefined (e.g. auction trades, off-book trades) |
| B                | Buy                                              |
| S                | Sell                                             |

#### BOOK_TYPE - Enumeration

|   Enumeration ID | Enumeration Description   |
|------------------|---------------------------|
|                0 | Lit order book            |
|                1 | Off-book                  |
|                2 | Dark book                 |
|                6 | Auction book              |

#### MKT_PHASE - Enumeration

|   Enumeration ID | Enumeration Description    |
|------------------|----------------------------|
|                0 | Closed                     |
|                1 | Open                       |
|                2 | Market at Close call phase |
|                6 | Market at Close uncrossing |

#### MMT_ALGO_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Not an algorithmic trade  |
| H                | Algorithmic trade         |

#### MMT_BENCHMARK_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Not a benchmark trade     |
| B                | Benchmark trade           |
| S                | Reference price trade     |

#### MMT_CROSS_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Not a cross trade         |
| X                | Agency cross trade        |

#### MMT_DEFERRAL_TYPE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | No deferral / unspecified |

#### MMT_DIVIDEND_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Not applicable            |
| E                | Ex-/cum-dividend          |

#### MMT_DUP_IND - Enumeration

| Enumeration ID   | Enumeration Description                         |
|------------------|-------------------------------------------------|
| -                | Unique trade report                             |
| 1                | Duplicative trade reported to more than one APA |

#### MMT_MKT_MECH - Enumeration

|   Enumeration ID | Enumeration Description   |
|------------------|---------------------------|
|                1 | Central Limit Order Book  |
|                4 | Off Book                  |
|                5 | Periodic Auction          |

#### MMT_MOD_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | New trade                 |
| A                | Amended trade             |
| C                | Trade cancellation        |

#### MMT_NEGOTIATED_IND - Enumeration

| Enumeration ID   | Enumeration Description                                            |
|------------------|--------------------------------------------------------------------|
| -                | Not applicable                                                     |
| 1                | Negotiated trade in liquid instruments                             |
| 2                | Negotiated trade in illiquid instruments                           |
| 3                | Negotiated trade subject to conditions other than the market price |
| N                | Negotiated trade                                                   |

#### MMT_OFF_BOOK_AUTO_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Not applicable            |
| M                | Off-book manual           |
| Q                | Off-book automated        |

#### MMT_PRICE_FORMING_IND - Enumeration

| Enumeration ID   | Enumeration Description                               |
|------------------|-------------------------------------------------------|
| J                | Trade not contributing to the price discovery process |
| N                | Price not available but pending                       |
| P                | Plain vanilla (price-forming) trade                   |
| T                | Non-price forming (technical) trade                   |

#### MMT_PUB_MODE - Enumeration

| Enumeration ID   | Enumeration Description                                                    |
|------------------|----------------------------------------------------------------------------|
| -                | Immediate publication                                                      |
| 1                | Delayed publication / late reported                                        |
| 2                | Deferred publication (Large in Scale)                                      |
| 3                | Deferred publication (illiquid instrument)                                 |
| 4                | Deferred publication (size specific to instrument)                         |
| 5                | Deferred publication (illiquid instrument and size specific to instrument) |
| 6                | Deferred publication (illiquid instrument and Large in Scale)              |

#### MMT_TRANS_CAT - Enumeration

| Enumeration ID   | Enumeration Description             |
|------------------|-------------------------------------|
| -                | Not applicable                      |
| D                | Dark trade [hidden order execution] |

#### MMT_TRD_MODE - Enumeration

| Enumeration ID   | Enumeration Description        |
|------------------|--------------------------------|
| 2                | Continuous trading             |
| 5                | Trade reporting (on-exchange)  |
| 6                | Trade reporting (off-exchange) |
| K                | Closing auction                |
| U                | Unscheduled auction            |

#### ORDER_TYPE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| L                | Limit order               |

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description                 |
|------------------|-----------------------------------------|
| C                | Closing Auction                         |
| U                | Unscheduled Auction                     |
| p                | Auction initiated by market participant |
| -                | Regular trading                         |

#### TRADE_TYPE - Enumeration

|   Enumeration ID | Enumeration Description          |
|------------------|----------------------------------|
|                1 | Lit order execution              |
|                2 | Hidden order execution           |
|                3 | Market at Close trade            |
|                4 | Large in Scale (LIS) Cross trade |
|                5 | Benchmark Cross trade            |
|                6 | Auction on Demand trade          |

#### TRADING_STATUS - Enumeration

|   Enumeration ID | Enumeration Description   |
|------------------|---------------------------|
|                1 | Active                    |
|                2 | Halted                    |
|                3 | Suspended                 |

#### UPDATE_TYPE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| A                | Add                       |
| D                | Delete                    |
| F                | Fill                      |
| M                | Modify                    |
| P                | Partial Fill              |