DHL System Entity Relationship Diagram (ERD):Entities:ShippedItem:Attributes:itemNumber (unique identifier)weightdimensionsinsuranceAmountdestinationfinalDeliveryDateCardinality:1 ShippedItem is processed at 1 RetailCenter1 ShippedItem participates in many TransportationEventsRetailCenter:Attributes:centerID (unique identifier)type (e.g., airport, service center)addressCardinality:many ShippedItems are processed at 1 RetailCenterTransportationEvent:Attributes:scheduleNumber (unique identifier)type (e.g., flight, truck)deliveryRouteCardinality:many ShippedItems participate in 1 TransportationEventRelationships:Processes:Connects ShippedItem and RetailCenterCardinality: One-to-one (1:1)Indicates that a single ShippedItem is processed at one and only one RetailCenter.Participates in:Connects ShippedItem and TransportationEventCardinality: Many-to-many (M:N)Indicates that a single ShippedItem can participate in multiple TransportationEvents, and a single TransportationEvent can involve multiple ShippedItems.Identifiers:Each entity has a unique identifier:ShippedItem: itemNumberRetailCenter: centerIDTransportationEvent: scheduleNumberConstraints:Primary Key: Each entity's unique identifier is its primary key.Foreign Key:Processes relationship: RetailCenter.centerID references ShippedItem.retailCenterID (foreign key)Participates in relationship:ShippedItem.itemNumber references TransportationEvent.shippedItemIDs (foreign key, assuming an identifier list for participating items)TransportationEvent.scheduleNumber references ShippedItem.transportationEventIDs (foreign key, assuming an identifier list for participating items)This ERD captures the essential information about the DHL system, including shipped items, retail centers, transportation events, and their relationships. The cardinality constraints and identifiers ensure data integrity and efficient tracking of shipped items within the system.
Question
DHL System Entity Relationship Diagram (ERD):Entities:ShippedItem:Attributes:itemNumber (unique identifier)weightdimensionsinsuranceAmountdestinationfinalDeliveryDateCardinality:1 ShippedItem is processed at 1 RetailCenter1 ShippedItem participates in many TransportationEventsRetailCenter:Attributes:centerID (unique identifier)type (e.g., airport, service center)addressCardinality:many ShippedItems are processed at 1 RetailCenterTransportationEvent:Attributes:scheduleNumber (unique identifier)type (e.g., flight, truck)deliveryRouteCardinality:many ShippedItems participate in 1 TransportationEventRelationships:Processes:Connects ShippedItem and RetailCenterCardinality: One-to-one (1:1)Indicates that a single ShippedItem is processed at one and only one RetailCenter.Participates in:Connects ShippedItem and TransportationEventCardinality: Many-to-many (M:N)Indicates that a single ShippedItem can participate in multiple TransportationEvents, and a single TransportationEvent can involve multiple ShippedItems.Identifiers:Each entity has a unique identifier:ShippedItem: itemNumberRetailCenter: centerIDTransportationEvent: scheduleNumberConstraints:Primary Key: Each entity's unique identifier is its primary key.Foreign Key:Processes relationship: RetailCenter.centerID references ShippedItem.retailCenterID (foreign key)Participates in relationship:ShippedItem.itemNumber references TransportationEvent.shippedItemIDs (foreign key, assuming an identifier list for participating items)TransportationEvent.scheduleNumber references ShippedItem.transportationEventIDs (foreign key, assuming an identifier list for participating items)This ERD captures the essential information about the DHL system, including shipped items, retail centers, transportation events, and their relationships. The cardinality constraints and identifiers ensure data integrity and efficient tracking of shipped items within the system.
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