# Qatar Stock Exchange Enumerations The Qatar Stock Exchange (QSE) provides a trading platform for Qatari public shareholding companies’ equities, bonds, and other securities. The following fields have Enumerations: * BOOK_TYPE - Type of order book or trading mechanism through which a trade was executed. * TRADE_PERIOD - Market period during which a trade was executed. * TRADE_TYPE - Type of trade #### BOOK_TYPE - Enumeration | Enumeration ID | Enumeration Description | |------------------|---------------------------| | 0 | Lit order book | #### TRADE_PERIOD - Enumeration | Enumeration ID | Enumeration Description | |------------------|---------------------------| | - | Regular trading | | C | Closing auction | | O | Opening auction | | T | Trading at closing price | #### TRADE_TYPE - Enumeration | Enumeration ID | Enumeration Description | |------------------|---------------------------| | ‘””’ | Regular trade |