directive @core(feature: String!) repeatable on SCHEMA

directive @join__owner(graph: join__Graph!) on OBJECT

directive @join__type(
    graph: join__Graph!
    key: String!
    resolvable: Boolean = true
) repeatable on OBJECT | INTERFACE

directive @join__field(
    graph: join__Graph
    requires: String
    provides: String
) on FIELD_DEFINITION

directive @join__graph(name: String!, url: String!) on ENUM_VALUE

enum join__Graph {
    FOREST @join__graph(name: "forest", url: "http://example.com/forest")
    MANGROVE @join__graph(name: "mangrove", url: "http://example.com/mangrove")
    SAVANA @join__graph(name: "savana", url: "http://example.com/savana")
    STEPPE @join__graph(name: "steppe", url: "http://example.com/steppe")
}

type Squirrel {
    favouriteFood: String @join__field(graph: FOREST)
}

type Cheetah implements Animal
    @join__type(graph: MANGROVE, key: "species")
    @join__type(graph: SAVANA, key: "species")
{
    favouriteFood: String @join__field(graph: FOREST)
    runSpeedKmh: Float @join__field(graph: MANGROVE)
    species: String!
    swimSpeedKmh: Float @join__field(graph: MANGROVE)
    topSpeed: Int! @join__field(graph: SAVANA)
    weightGrams: Int @join__field(graph: STEPPE)
}

type Mammoth {
    tuskLength: Int @join__field(graph: STEPPE)
    weightGrams: Int @join__field(graph: STEPPE)
}

type Query {
    getMammoth: Mammoth @join__field(graph: STEPPE)
}

interface Animal
    @join__type(graph: MANGROVE, key: "species")
    @join__type(graph: FOREST, key: "species", isInterfaceObject: true)
    @join__type(graph: STEPPE, key: "species", isInterfaceObject: true)
{
    favouriteFood: String @join__field(graph: FOREST)
    species: String!
    swimSpeedKmh: Float @join__field(graph: MANGROVE)
    weightGrams: Int @join__field(graph: STEPPE)
}