graph

type NodeID string

type OboGraph interface {
	// IRI represents a stable URL for locating the source OWL formatted file
	IRI() string
	// ID is a short and unique name of the graph
	ID() string
	// Label is a short human readable description of the graph
	Label() string
	// Meta returns the associated Meta container
	Meta() *model.Meta
	// ExistsTerm checks for existence of a term
	ExistsTerm(NodeID) bool
	// GetTerm fetches an existing term
	GetTerm(NodeID) Term
	// GetRelationship fetches relationship(edge) between parent(object) and
	// children(subject)
	GetRelationship(NodeID, NodeID) Relationship
	// Relationships returns all relationships(edges) in the graph
	Relationships() []Relationship
	// Terms returns all terms(node/vertex) in the graph
	Terms() []Term
	// TermsByType provides a filtered list of specific terms
	TermsByType(string) []Term
	// Children returns all children terms(depth one)
	Children(NodeID) []Term
	// Parents returns all parent terms(depth one)
	Parents(NodeID) []Term
	// Ancestors returns all reachable(direct or indirect) parent terms. It uses
	// BFS algorithm
	Ancestors(NodeID) []Term
	// Descendents returns all reachable(direct or indirect) children terms. It uses
	// BFS algorithm
	Descendents(NodeID) []Term
	// DescendentsDFS returns all reachable(direct or indirect) children terms
	// using DFS algorithm.
	DescendentsDFS(NodeID) []Term
	// AddRelationship creates relationship between terms, it overrides the
	// existing terms and relationship
	AddRelationship(Term, Term, Term) error
	// AddRelationshipWithID creates relationship between existing terms
	AddRelationshipWithID(NodeID, NodeID, NodeID) error
	// AddTerm add a new Term to the graph overwriting any existing one
	AddTerm(Term)
}

type Relationship interface {
	// Object is the unique identifier for parent term
	Object() NodeID
	// Subject is the unique identifier for child term
	Subject() NodeID
	// Predicate is the unique identifier for term that describes the relationship
	Predicate() NodeID
	// Meta returns the relationship's Meta object
	Meta() *model.Meta
}

type Term interface {
	// ID is the term's unique identifier
	ID() NodeID
	// HasMeta check for presence of any metadata
	HasMeta() bool
	// Meta returns the term's Meta object
	Meta() *model.Meta
	// RdfType is one defined rdf type, either of CLASS,
	// INDIVIDUAL OR PROPERTY
	RdfType() string
	// Label is a short human readable description of the term
	Label() string
	// IRI represents a stable URL for term's information
	IRI() string
	// IsDeprecated provides the current status of the term
	IsDeprecated() bool
}