Final answer:
Several details are required to be recorded in maintaining information about a horse, including registration number, name, type, gender, and trainer.
Step-by-step explanation:
In maintaining information about a horse, several details are required to be recorded. These include the registration number, name, type, gender, and trainer. The registration number uniquely identifies the horse and is often used in official documentation. The name helps to identify the horse and is commonly used for reference. The type refers to the breed or classification of the horse, while the gender indicates whether it is male or female. Finally, the trainer is responsible for the care and training of the horse.