Changes between Version 8 and Version 9 of Conceptual Design – ER Diagram and Data Requirements


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Timestamp:
08/26/25 13:54:16 (7 days ago)
Author:
221531
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  • Conceptual Design – ER Diagram and Data Requirements

    v8 v9  
    163163
    164164    **''is_part_of''** – relation between Ingredient and Item Ingredient, where an ingredient can belong to multiple items.\\
    165 
    166 === Ternary ===
     165\\
    167166* Order ↔ Delivery Man ↔ Restaurant \\
    168     **Junction: A ternary relationship exists because an Order links simultaneously to a Restaurant where it was placed and a Delivery Man who delivers it.
     167    **Junction**: A ternary relationship exists because an Order links simultaneously to a Restaurant where it was placed and a Delivery Man who delivers it.\\
    169168    **''places''** – relation where an Order is prepared by one restaurant but can be delivered by multiple delivery men. A Delivery Man delivers multiple orders from potentially different restaurants. Restaurant produces multiple orders that get delivered by different delivery men.