# description
Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

# concept[].definition
Support for the specified capability is required to be considered conformant.

# concept[].definition
Support for the specified capability is strongly encouraged, and failure to support it should only occur after careful consideration.

# concept[].definition
Support for the specified capability is not necessary to be considered conformant, and the requirement should be considered strictly optional.

# concept[].definition
Support for the specified capability is strongly discouraged and should occur only after careful consideration.