cayley

README

Cayley is an open-source database for Linked Data. It is inspired by the graph database behind Google's Knowledge Graph (formerly Freebase).

Documentation

Features

• Built-in query editor, visualizer and REPL
• Multiple query languages:
  • Gizmo: query language inspired by Gremlin
  • GraphQL-inspired query language
  • MQL: simplified version for Freebase fans
• Modular: easy to connect to your favorite programming languages and back-end stores
• Production ready: well tested and used by various companies for their production workloads
• Fast: optimized specifically for usage in applications

Performance

Rough performance testing shows that, on 2014 consumer hardware and an average disk, 134m quads in LevelDB is no problem and a multi-hop intersection query -- films starring X and Y -- takes ~150ms.

Community

• Website: cayley.io
• Slack: cayleygraph.slack.com -- Invite here
• Discourse list: discourse.cayley.io (Also acts as mailing list, enable mailing list mode)
• Twitter: @cayleygraph
• Involvement: Contribute

Documentation

Index

• Variables
• func Quad(subject, predicate, object, label interface{}) quad.Quad
• func Triple(subject, predicate, object interface{}) quad.Quad
• type Handle
  • func NewGraph(name, dbpath string, opts graph.Options) (*Handle, error)
  • func NewMemoryGraph() (*Handle, error)
  • func (h *Handle) Close() error
• type Iterator
• type Path
• type QuadStore
• type QuadWriter

Variables

var (
	StartMorphism = path.StartMorphism
	StartPath     = path.StartPath

	NewTransaction = graph.NewTransaction
)

Functions

func Quad

func Quad(subject, predicate, object, label interface{}) quad.Quad

func Triple

func Triple(subject, predicate, object interface{}) quad.Quad

Types

type Handle

type Handle struct {
	graph.QuadStore
	graph.QuadWriter
}

func NewGraph

func NewGraph(name, dbpath string, opts graph.Options) (*Handle, error)

func NewMemoryGraph

func NewMemoryGraph() (*Handle, error)

func (*Handle) Close

func (h *Handle) Close() error

type Iterator

type Iterator = graph.Iterator

type Path

type Path = path.Path

type QuadStore

type QuadStore = graph.QuadStore

type QuadWriter

type QuadWriter = graph.QuadWriter