What is the DIFFERENCE between a Riser Doorset and an Access Panel?

So what is the difference between a riser doorset and an access panel?

1. Riser Doorset: Primarily used by pedestrians to pass through the aperture into the space the other side of the doorset.
2. Access Panel: A hinged panel that closes off a cavity whilst allowing occasional access for maintenance and other tasks, with the pedestrian staying outside the cavity.