本体建模

# Model-Flow Ontology Definition
package: ecommerce
version: 1.3.0

classes:
  User:
    label: 用户
    key: user_id
    properties:
      name:   { type: string, required: true }
      gender: { type: enum, values: [M, F] }

  Product:
    label: 商品
    key: sku
    properties:
      price:  { type: decimal, constraint: "value >= 0" }
      stock:  { type: int, constraint: "value >= 0" }
      brand:  { label: Brand, key: name }

  Brand:
    label: 品牌
    key: name

  Order:
    label: 订单
    key: order_no
    properties:
      amount:     { type: decimal, constraint: "value >= 0" }
      placed_at: { type: datetime, constraint: "value >= now()" }
      risk_score:{ type: decimal, constraint: "value >= 0 and value <= 1" }

relations:
  - from: User
    to: Product
    label: purchase
  - from: Product
    to: Brand
    label: belongs_to
  - from: Order
    to: User
    label: placed_by
  - from: Order
    to: Product
    label: contains

rules:
  - name: auto_categorize_frequent_brand
    when: User purchased Product
    then: associate Brand as frequent

actions:
  - name: place_order
    steps: [check_stock, deduct_stock, create_order]
# ... 完整定义见文件