Enums
:::::

.. php:enum:: RelationshipType

    Defines relationship types

    .. php:case:: contains
    .. php:case:: copies
    .. php:case:: derives
    .. php:case:: refines
    .. php:case:: satisfies
    .. php:case:: traces
    .. php:case:: verifies

.. php:enum:: Risk

    Defines `SysML <https://sysml.org>`__ risk levels

    .. php:case:: high
    .. php:case:: low
    .. php:case:: medium

.. php:enum:: Type

    Defines `SysML <https://sysml.org>`__ requirement types

    .. php:case:: designConstraint
    .. php:case:: functionalRequirement
    .. php:case:: interfaceRequirement
    .. php:case:: performanceRequirement
    .. php:case:: physicalRequirement
    .. php:case:: requirement

.. php:enum:: VerifyMethod

    Defines `SysML <https://sysml.org>`__ methods to verify a requirement has been met

    .. php:case:: analysis
    .. php:case:: demonstration
    .. php:case:: inspection
    .. php:case:: test