User`s guide

Requirements Linking with Simulink Annotations
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Requirements Linking with Simulink Annotations
You can create requirements links to and from Simulink.Annotation objects using
the Requirements Management Interface (RMI). Annotations are free-floating text boxes
that you can place inside a Simulink model. For more information, see “Annotations”
in the Simulink documentation. You can use RMI linking to associate annotations with
other Simulink objects or external requirements documents. Note that requirements
linking for annotations is not supported in Stateflow.
Requirements linking for Simulink annotations is enabled only if you configure your
model to store requirements data externally. To specify external storage of requirements
data for a model, in the Requirements Settings dialog box under Storage > Default
storage location for requirements links data, select Store externally (in a
separate *.req file). If you have an existing model that contains internally stored
requirements links, you must convert the model to store requirements data externally
before you can use requirements linking for annotations in the model. To switch the
model from internal to external RMI storage, move all existing requirements links in it
to an external .req file by selecting Analysis > Requirements Traceability > Move
to File. For more information on requirements links storage, see “Specify Storage for
Requirements Links”.
Note: If you later change your model to store requirements links internally as described
in “Move Externally Stored Requirements Links to the Model File”, or if you save the
model in a version of MATLAB prior to R2012b, annotation requirements links are either
discarded or attached to a corresponding parent diagram.
Annotations are context-specific. Unlike copying other Simulink objects, copying an
annotation does not copy its associated requirements links. Requirements links from
annotations do not appear in generated code, but requirements links to annotations from
other Simulink objects do appear.