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The SEDRIS Data Representation Model
APPENDIX A - Classes State Control Link |
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An instance of this DRM class specifies an <Expression> that determines the active_state_value of all target state-related aggregation instances, and specifies how the targets are to behave if the resulting active_state_value does not match any branch's <State Data> within a given target.
Consider a <State Related Features> instance describing the topology of a road, where the road crosses bridges that can be destroyed and has segments that can be washed out by flooding. The "active state" of the road, i.e. how much damage it has actually suffered, is a variable, determined by some combination of environmental conditions (e.g. amount of precipitation, whether a nearby dam has collapsed, and so on).
Consequently, the <State Related Features> has a <State Control Link> component, which specifies a <Variable> that controls the active_state_value of the <State Related Features>.
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| SE_String | description; | (notes) |
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| SE_Integer_Positive | expr_index; | (notes) |
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| SE_State_Mismatch_Behaviour | mismatch_behaviour; | (notes) |
This is a text description of the given <Control Link> instance's purpose.
This specifies which <Expression> component controls the active_state_value field of the target state-related aggregate(s).
This specifies the behaviour state control when the specified controlling <Expression> evaluates to a state value that does not correspond (match) any branch's <State Data> within the target state-related aggregate(s).
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