This illustration shows the UML class diagram that models the application objects for the Power Demand Sample Data Cartridge.

A Power Cartridge User stores and retrieves Hourly Demand Status instances associated with a Regional Grid whose Sensors and Cameras supply Cell Temperature Readings and Satellite Images, respectively, for each Cell in the grid.

• Power Cartridge User

  • Relationship: 1 to many "retrieves" and "stores" association with Hourly Demand Status

• Regional Grid

  • Attribute: "Grid No"

  • Relationships: 1 to many association with Hourly Demand Status, and an is an aggregation of Locator

• Hourly Demand Status

  • Attributes: "Date", "Time", "TotalGridDemand", "MaxCellDemand", "MinCellDemand"

  • Methods: "calcTotalGridDemand()", "getMaxCellDemand()", "getMinCellDemand()", "isEqualToSpecificCell()", "isEqualToAnyCell()"

  • Relationships: many to 1 "association with Regional Grid, many to 1 "retrieves" and "stores" association with Power Cartridge User, and 1 to 100 aggregation of Cell Demand Reading

• Locator

  • Attributes: "NW", "NE", "SW", "SE"

  • Relationships: 1 to 1 aggregation component of Cell, and an aggregation component of Regional Grid

• Cell Demand Reading

  • Attributes: "CellNo", "Demand"

  • Relationships: 1 to 1 aggregation "reads demand for" of Cell, and 100 to 1 aggregation component of Hourly Demand Status

• Cell

  • Attribute: "CellNo"

  • Relationships: 1 to 1 aggregation of Meter, 1 to 1 aggregation of Locator, 1 to 2 aggregation of Grid Coordinate, 1 to 1 aggregation component of Cell Demand Reading, 1 to 1 "reads temperature" association with Cell Temperature Reading, and 1 to 1 "provides matching image" association with Satellite Image

• Meter

  • Relationship: 1 to 1 aggregation component of Cell

• Grid Coordinate

  • Attributes: "x" and "y"

  • Relationship: 2 to 1 aggregation component of Cell

• Cell Temperature Reading

  • Attribute: "Temperature"

  • Relationships: 1 to 1 "reads temperature" association with Cell, and 1 to 1 "senses" aggregation of Sensor

• Satellite Image

  • Attribute: "GreyScaleValue"

  • Relationships: 1 to 1 "provides matching image" association with Cell, and 1 to many "photographs" aggregation of Camera

• Sensor

  • Relationship: 1 to 1 "senses" aggregation component of Cell Temperature Reading

• Camera

  • Relationship: many to 1 "photographs" aggregation component of Satellite Image