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docs/mvp/ddd/06-labeling-bc.md

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+# Labeling BC - Detailliertes Domain Model
+
+**Bounded Context:** Labeling
+**Domain Type:** CORE
+**Verantwortung:** Automatische Berechnung von Nährwerten/Allergenen, Etikettengenerierung
+
+## Aggregates
+
+### ProductLabel (Aggregate Root)
+
+```
+ProductLabel
+├── ProductLabelId
+├── ArticleId - Reference to Master Data
+├── RecipeId - Reference to Production BC (for auto-calculation)
+├── ProductName
+├── Manufacturer
+├── Ingredients[] (Entity) - From Recipe, sorted descending by weight
+├── Allergens[] (VO) - Auto-calculated from ingredients
+├── TraceDeclarations[] (VO) - "May contain traces of..."
+├── NutritionFacts (Entity) - Auto-calculated from recipe
+│   ├── EnergyKJ, EnergyKcal, Fat, SaturatedFat, Carbs, Sugars, Protein, Salt
+│   └── CalculationBase (PER_100G | PER_PORTION)
+├── QualityLabels[] (VO) - Bio, Regional, Animal Welfare
+├── OriginLabeling (VO)
+└── LabelVersion
+
+Invariants:
+- All EU allergens must be declared
+- Ingredients sorted by quantity (highest first) - EU regulation
+- Nutrition facts must sum correctly from recipe
+- If BIO label, all ingredients must be BIO-certified
+- Allergens automatically inherited from ingredients (no manual override!)
+```
+
+## Use Cases
+
+```java
+GenerateLabelFromRecipe - Calculates nutrition & allergens from recipe
+PrintLabelAtScale - Sends label to scale for printing with current weight
+UpdateAllergenMatrix - Regenerates allergen matrix for all products
+```