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A PhSVariable has values that can vary over time in a continuous or discrete fashion.

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Figure 1: Simulation stereotypes
Figure 21: PhSVariables and PhSConstant in SysML
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SysPhS-1.1
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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SysPhS Keywords
PhSVariable
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A PhSVariable has values that can vary over time in a continuous or discrete fashion.
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Continuous variables have values that are close to their values at nearby times in the past and future. Discrete variables have values that are the same as their values at nearby times in either the past or future, or both.
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A PhSConstant has values that do not change during simulation runs. Values can change between simulation runs.
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Continuous variables have values that are close to their values at nearby times in the past and future. Discrete variables have values that are the same as their values at nearby times in either the past or future, or both.
PhSVariable: [1] The stereotyped property must be typed by Real, Integer, or Boolean, or one of their specializations.
PhSVariable: [2] isContinuous may be true only when the stereotyped property is typed by Real or one of its specializations.
PhSVariable: [3] isConserved may be true only when isContinuous is true and the stereotyped property is on a block specialized from ConservedQuantityKind (see Subclause 11.2.2).
PhSVariable: [4] changeCycle may be other than 0 only when isContinuous is false.
PhSVariable: [5] changeCycle must be positive or 0.
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