schema

type Action struct {
	Name  string `json:"name"`
	Child Exp    `json:"child"`
}

type Child Exp

type ChildKind string

type Entity struct {
	Name      string                 `json:"name"`
	Relations []Relation             `json:"relations"`
	Actions   []Action               `json:"actions"`
	Option    map[string]interface{} `json:"option"`
}

type Exp interface {
	GetType() string
	GetKind() string
}

type Leaf struct {
	Exclusion bool     `json:"exclusion"`
	Type      LeafType `json:"type"` // tupleToUserSet or computedUserSet
	Value     string   `json:"value"`
}

type LeafType string

type OPType string

type Relation struct {
	Name   string                 `json:"name"`
	Types  []string               `json:"type"`
	Option map[string]interface{} `json:"option"`
}

type Relations []Relation

type Rewrite struct {
	Type     OPType  `json:"type"` // union or intersection
	Children []Child `json:"children"`
}

type Schema struct {
	Entities map[string]Entity `json:"entities"`
}