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eng: Support N/A in the action transitions

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Sometimes the pre-conditions in an action requirement are not
independent and it is necessary to mark pre-conditions as not applicable
in a particular transition.

Update #3715.
This commit is contained in:
Sebastian Huber 2020-07-27 15:38:30 +02:00
parent f12cae140e
commit c2595631da
1 changed files with 13 additions and 4 deletions
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17
eng/req/items.rst
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@ -2192,8 +2192,12 @@ a condition used to define pre-conditions and post-conditions of an action
requirement. It shall be formatted in CamelCase. It should be brief and requirement. It shall be formatted in CamelCase. It should be brief and
abbreviated. The rationale for this is that the names are used in tables and abbreviated. The rationale for this is that the names are used in tables and
the horizontal space is limited by the page width. The more conditions you the horizontal space is limited by the page width. The more conditions you
have in an action requirement, the shorter the names should be. The value shall have in an action requirement, the shorter the names should be. The name
match with the regular expression "``^[A-Z][a-zA-Z0-9]+$"``. ``NA`` is reserved and indicates that a condition is not applicable. The value
* shall match with the regular expression "``^[A-Z][a-zA-Z0-9]+$"``,
* and, shall be not equal to "``NA``".
This type is used by the following types: This type is used by the following types:
@ -2429,8 +2433,13 @@ A value of this type shall be of one of the following variants:
:ref:`SpecTypeActionRequirementName`. The list defines the set of states of :ref:`SpecTypeActionRequirementName`. The list defines the set of states of
the pre-condition in the transition. the pre-condition in the transition.
* The value may be a string. The value represents all states of the * The value may be a string. The value ``all`` represents all states of the
pre-condition in the transition. The value shall be equal to "``all``". pre-condition in this transition. The value ``N/A`` marks the pre-condition
as not applicable in this transition. The value shall be an element of
* "``all``", and
* "``N/A``".
This type is used by the following types: This type is used by the following types: