| class  | BalancingTransaction | Represents the broker's final supply/demand
 imbalance in the current timeslot, and the Distribution Utility's charge
 for this imbalance. | 
| class  | BankTransaction | Represents interest charges and payments for brokers. | 
| class  | CapacityTransaction | Represents the fee assessed by the Distribution Utility for peak
 capacity events. | 
| class  | CashPosition | A CashPosition domain instance represents the current state of
 a broker's cash account. | 
| class  | DistributionTransaction | Represents the fee assessed
 by the Distribution Utility for transport of energy over its facilities
 during the current timeslot. | 
| class  | MarketTransaction | A MarketTransaction instance represents a trade in the wholesale market. | 
| class  | TariffTransaction | A TariffTransactioninstance represents the kWh of energy consumed
 (kWh < 0) or producedkWh > 0by some members of a 
 specific customer model, in a specific timeslot, under a particular tariff. |