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What Are Item IDs?

Every item in UMI is identified by a unique Item ID (FName). This is the primary key used throughout the system to reference item types. 
FName ItemID = "HealthPotion";
FName ItemID = "IronSword";
FName ItemID = "WoodLog";

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Best Practices

  • Use descriptive names: IronSword not Sword1
  • Be consistent with naming: Use PascalCase or snake_case consistently
  • Avoid spaces: Use HealthPotion not Health Potion
  • Keep them unique: No two items should share the same ID
  • Plan for localization: Item IDs are not shown to players (use DisplayName for that)

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Where Item IDs Are Used

  • ItemDataAsset: Defines the item type
  • FItemInstance: References which item type this instance is
  • Crafting recipes: Specifies ingredients and outputs
  • Loot tables: Defines what can drop
  • Container restrictions: Whitelist/blacklist specific items
  • Save system: Persists item references