NFG v0.2

Nicomacos Food Graph — An open vocabulary for restaurant, dish, ingredient, and food provenance data. Extends Schema.org for the food / hospitality domain.

Namespace

https://nfg.ngraph.jp/schema/v0.2/

JSON-LD Context

/schema/v0.2/context.jsonld

Use this URL inside the @context array of your JSON-LD payload alongside https://schema.org:

{
  "@context": [
    "https://schema.org",
    "https://nfg.ngraph.jp/schema/v0.2/context.jsonld"
  ],
  "@type": [ "Restaurant", "nfg:SeafoodRestaurant" ],
  "name": "蟹と海鮮ぼんた",
  "nfg:vadCertified": true,
  "nfg:vadSource": "owner_verified",
  "nfg:confidenceScore": 0.95
}

Defined Terms (v0.2)

Types

• nfg:SeafoodRestaurant
• nfg:CocktailBar
• nfg:KappoRestaurant
• nfg:Dish
• nfg:Ingredient

Properties

• nfg:vadCertified (xsd:boolean) — Verified Authentic Data: owner-confirmed
• nfg:vadSource (xsd:string) — Source of verification (e.g. owner_verified, brand_official)
• nfg:confidenceScore (xsd:decimal, 0.0–1.0) — Data confidence
• nfg:culturalContext (xsd:string) — Cultural / regional context for international audience
• nfg:cookingMethods (set of strings)
• nfg:dishCategory
• nfg:mainIngredients (set of strings)
• nfg:provenance — Origin / sourcing info
• nfg:scientificName (e.g. Latin name for fish/crab)
• nfg:seasonStart (xsd:date)
• nfg:seasonEnd (xsd:date)

Versioning

NFG follows semantic versioning. Breaking changes increment minor (e.g. v0.2 → v0.3) during the 0.x phase. v1.0 will be released after community stabilization.

Provided by

株式会社 NGraph (NGraph Inc.) — https://ngraph.jp/

NFG is the data standard powering OMISEAI and partner restaurants.