Cayley

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

This is a fork of the upstream project.

Features

🗄️ Multiple Backend Stores

In-memory, ephemeral
- btree in-memory-database
Key-Value Stores
- Bolt: Lightweight embedded K/V store
- Badger: Full-featured K/V store
- Pebble: LevelDB/RocksDB inspired K/V store
SQL Stores
- CockroachDB
- PostgreSQL
- SQLite
- MySQL

🔍 Efficient Data Management

Automatic indexing of quad directions (subject, predicate, object, label)
Transactions for atomic updates

🔧 Powerful Query Capabilities

Expressive query languages (Gizmo, Go API) for traversing and analyzing the graph

🌐 API and CLI

RESTful API for interacting with the database
Command-line interface for querying and managing databases

License

Apache-2.0