What is the difference between “conflict serializable” and “conflict equivalent”?

Question

In database theory, what is the difference between \"conflict serializable\" and \"conflict equivalent\"?

My textbook has a section on conflict serializable but glosses

Answer 1

Conflict Equivalent Schedules: if a Schedule S can be transformed into a schedule S' by a series of swaps of non conflicting instructions, we say that schedule S & S' are conflict equivalent.

Conflict Serializable Schedule: Schedule S is conflict serializable if it is conflict equivalent to a serial schedule.