<div align="center">
  <a href="https://github.com/cayleygraph/cayley">
    <img width="200" src="static/branding/cayley_bottom.png?raw=true" alt="Cayley">
  </a>
</div>

[![Build Status](https://travis-ci.com/cayleygraph/cayley.svg?branch=master)](https://travis-ci.com/cayleygraph/cayley)
[![Container Repository](https://img.shields.io/docker/cloud/build/cayleygraph/cayley "Container Repository")](https://hub.docker.com/r/cayleygraph/cayley)

Cayley is an open-source database for [Linked Data](https://www.w3.org/standards/semanticweb/data). It is inspired by the graph database behind Google's [Knowledge Graph](https://en.wikipedia.org/wiki/Knowledge_Graph) (formerly [Freebase](http://freebase.com)).

[![Get it from the Snap Store](https://snapcraft.io/static/images/badges/en/snap-store-white.svg)](https://snapcraft.io/cayley)

## [Documentation](https://cayley.gitbook.io/cayley/)

## Features

- Built-in query editor, visualizer and REPL
- Multiple query languages:
  - [Gizmo](./docs/GizmoAPI.md): query language inspired by [Gremlin](http://gremlindocs.com/)
  - [GraphQL](./docs/GraphQL.md)-inspired query language
  - [MQL](./docs/MQL.md): simplified version for [Freebase](https://en.wikipedia.org/wiki/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](https://cayley.io)
- Slack: [cayleygraph.slack.com](https://cayleygraph.slack.com) -- Invite [here](https://cayley-slackin.herokuapp.com/)
- Discourse list: [discourse.cayley.io](https://discourse.cayley.io) (Also acts as mailing list, enable mailing list mode)
- Twitter: [@cayleygraph](https://twitter.com/cayleygraph)
- Involvement: [Contribute](./docs/Contributing.md)


github.com/cayleygraph/cayley

(Experimental) An ambiguous license classifier was found.

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Ambiguous License Classifier

Source files are encoded using a non-standard text encoding.

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Bad text encoding

Package version is not a valid semantic version (semver).

What is bad semver?

Bad semver

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What is bad dependency semver?

Bad dependency semver

Source files contain bidirectional unicode control characters. This could indicate a Trojan source supply chain attack. See: trojansource.codes for more information.

What are bidirectional unicode control characters?

Bidirectional unicode control characters

This package has multiple bin scripts with the same name.  This can cause non-deterministic behavior when installing or could be a sign of a supply chain attack

What is bin script confusion?

Bin script confusion

Semantic versions published out of chronological order.

What is a chronological version anomaly?

Chronological version anomaly

Project maintainer's SSH key has been compromised.

What is a compromised SSH key?

Compromised SSH key

(Experimental) Copyleft license information was found

What do I need to know about license files?

Copyleft License

Contains a Critical Common Vulnerability and Exposure (CVE).

What is a critical CVE?

Title

Critical CVE

Contains a high severity Common Vulnerability and Exposure (CVE).

What is a CVE?

High CVE

Uses debug, reflection and dynamic code execution features.

What is debug access?

Debug access

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Deprecated

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Deprecated SPDX exception

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Deprecated license

Package name is similar to other popular packages and may not be the package you want.

What is a typosquat?

Possible typosquat attack

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Dynamic require

Package does not contain any code. It may be removed, is name squatting, or the result of a faulty package publish.

What is an empty package?

Empty package

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Environment variable access

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Name

Extraneous dependency

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What are file dependencies?

File dependency

Accesses the file system, and could potentially read sensitive data.

What is filesystem access?

Filesystem access

Package has a dependency with a floating version range.  This can cause issues if the dependency publishes a new major version.

What are floating dependencies?

Floating dependency

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What are git dependencies?

Git dependency

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GitHub dependency

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Native code

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What are high entropy strings?

High entropy strings

Contains unicode homoglyphs which can be used in supply chain confusion attacks.

What are unicode homoglyphs?

Unicode homoglyphs

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What are http dependencies?

HTTP dependency

Install scripts are run when the package is installed. The majority of malware in npm is hidden in install scripts.

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Install scripts

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Invalid manifest file

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Invisible chars

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License exception

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Long strings

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

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Major refactor

This package is malware. We have asked the package registry to remove it.

What is known malware?

Known malware

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What is manifest confusion?

Manifest confusion

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Medium CVE

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What is a mild CVE?

Low CVE

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Minified code

(Experimental) A package's licensing information has fine-grained problems

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The package was published by an npm account that no longer exists.

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Non-existent author

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(Experimental) Package does not have a license and consumption legal status is unknown.

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Missing license

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Modified license exception

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Modified license

What is network access?

Network access

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

What is new author?

New author

Package does not specify a list of contributors or an author in package.json.

Why is contributor and author data important?

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(Experimental) License information could not be found

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No repository

Package does not have any tests. This is a strong signal of a poorly maintained or low quality package.

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No tests

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

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No v1

What is a missing website?

No website

(Experimental) Package has a non-FSF-approved license.

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Non FSF license

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Non OSI license

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What is a non SPDX license?

Non SPDX license

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github.com/cayleygraph/cayley

Documentation

Features

Performance

Community

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