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terminusdb
177 Stars 15 Forks Apache License 2.0 504 Commits 14 Opened issues

Description

a tokio-enabled data store for triple data

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terminusdb-store, a tokio-enabled data store for triple data

Build Status Crate Documentation codecov

Overview

This library implements a way to store triple data - data that consists of a subject, predicate and an object, where object can either be some value, or a node (a string that can appear both in subject and object position).

An example of triple data is:

cow says value(moo).
duck says value(quack).
cow likes node(duck).
duck hates node(cow).
In
cow says value(moo)
,
cow
is the subject,
says
is the predicate, and
value(moo)
is the object.

In

cow likes node(duck)
,
cow
is the subject,
likes
is the predicate, and
node(duck)
is the object.

terminusdb-store allows you to store a lot of such facts, and search through them efficiently.

This library is intended as a common base for anyone who wishes to build a database containing triple data. It makes very few assumptions on what valid data is, only focusing on the actual storage aspect.

This library is tokio-enabled. Any i/o and locking happens through futures, and as a result, many of the functions in this library return futures. These futures are intended to run on a tokio runtime, and many of them will fail outside of one. If you do not wish to use tokio, there's a small sync wrapper in

store::sync
which embeds its own tokio runtime, exposing a purely synchronous API.

Usage

Add this to your

Cargo.toml
:
[dependencies]
terminus-store = "0.16"

create a directory where you want the store to be, then open that store with

rust
let store = terminus_store::open_directory_store("/path/to/store").await.unwrap();

Or use the sync wrapper:

rust
let store = terminus_store::open_sync_directory_store("/path/to/store").unwrap();

For more information, visit the documentation on docs.rs.

Roadmap

We are constantly developing terminusdb-store to make it a high quality succinct graph representation versioned datastorage layer. To help facilitate understanding of our aims for this project we have laid out a Roadmap. If you would like to assist in the development of terminusdb-store, or you think something should be added to the roadmap please contact us.

License

terminus-store is licensed under Apache 2.0.

Contributing

See CONTRIBUTING.md

See also

  • The Terminus database, for which this library was written: Website - GitHub
  • Our prolog bindings for this library: terminusstoreprolog
  • The HDT format, which the terminusdb-store layer format is based on: Website

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