Character position definition and scope:

A one-character alphabetic code indicates whether or not entrance and internal stairway ramps are provided.

Guidelines for applying content designators:

Code:

Description:

a

No ramps

b

Entrance and internal ramps

c

Entrance ramp only - multiple floors

d

Entrance ramp only - single floor

e

Internal ramps only

n

Not applicable

u

Unknown

See also:

007  Physical Description Fixed Field

Variable Control Fields