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Recorder
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Business Rules
The properties specified on the Recorder class are nominal properties that rarely change. In addition, if they do change we do not care about the history of these changes, so they are not date effective. Properties for which it is important to keep track of changes over time are going to be stored in the Recorder_Oper_Pty_Set class.
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Tank
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Business Rules
The properties specified on the Tank class are nominal properties that rarely change. In addition, if they do change we do not care about the history of these changes so they are not date effective. Properties for which it is important to keep track of changes over time are going to be stored in the Tank_Oper_Pty_Set class.
If there is only one end to the Tank, then the First_Tank_End_Shape_Code will be populated, but the Second_Tank_End_Shape_Code will no.
Normally, both tank end shapes are the same.
If the tank is horizontal, then both ends need to be the same.
If the tank is vertical, then only the bottom end needs to be described. The other end or top is always flat (the fluid level in the tank defines its top).
If a tank strapping table is not defined, then the tank geometry is needed in order to estimate its current inventory of product based on a fluid level.
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Tank_Oper_Pty_Set
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Business Rules
If a tank has a strapping table, it must be stored in this class, even if there is a default strapping table specified in the R_Tank_Cat class.
The operating properties stored in this class are properties that sporadically change over time or are properties that change at a fixed timeframe.
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