7.1.8.3 PEnum_PermeableCoveringOperationEnum

7.1.8.3.1 Semantic definition

This enumeration defines the valid types of permeable coverings.

Type	Description
`GRILL`	Protective screen of metal bars or wires.
`LOUVER`	Set of fixed or movable strips of wood, metal, etc. arranged to let air in while keeping light or rain out.
`SCREEN`	Upright, fixed or movable, sometimes folding framework used for protection against heat, light, access or similar.
`OTHER`	Other.
`NOTKNOWN`	Not known.
`UNSET`	Unset.

Table 7.1.8.3.A