# rdf-string-ttl > Convenience functions for creating and serializing RDF terms and quads following Turtle/SPARQL syntax Latest version **2.0.1** (published 2025-01-08) · MIT license · 0 weekly downloads ## Install ```sh npm install rdf-string-ttl pnpm add rdf-string-ttl yarn add rdf-string-ttl bun add rdf-string-ttl ``` ## Health **Score 45/100 (D)** — status: stable. Positive: has types; no vulnerabilities; high quality score. Warnings: low downloads; no esm support. Negative: stale. ## Facts | | | |---|---| | Version | 2.0.1 | | Published | 2025-01-08 | | First published | 2020-08-16 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | bundled | | Module format | CommonJS | | Dependencies | 1 | | Unpacked size | 41.4 KB | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 2 | | Author | Ruben Taelman | | Maintainers | rubensworks | | Keywords | rdf, rdfjs, term, quad, triple, turtle, sparql, n3 | ## Links - npm: https://www.npmjs.com/package/rdf-string-ttl - Repository: https://github.com/rubensworks/rdf-string-ttl.js - Homepage: https://github.com/rubensworks/rdf-string-ttl.js#readme - Issues: https://github.com/rubensworks/rdf-string-ttl.js/issues - Funding: https://github.com/sponsors/rubensworks/ - npm.io page: https://npm.io/package/rdf-string-ttl ## Dependencies (1) - [rdf-data-factory](https://npm.io/package/rdf-data-factory.md) ^2.0.0 ## Alternatives - [localforage](https://npm.io/package/localforage.md) — 6.2M weekly downloads - [localforage-observable](https://npm.io/package/localforage-observable.md) — 30.8K weekly downloads - [@y/y](https://npm.io/package/@y/y.md) — 30.1K weekly downloads - [@metaobjectsdev/render](https://npm.io/package/@metaobjectsdev/render.md) — 3.5K weekly downloads - [@ledgerhq/coin-algorand](https://npm.io/package/@ledgerhq/coin-algorand.md) — 1.1K weekly downloads ## Recent versions - 2.0.1 (latest) — 2025-01-08 - 2.0.0 — 2025-01-08 - 1.3.2 — 2022-11-09 - 1.3.1 — 2022-11-09 - 1.3.0 — 2022-11-04 - 1.2.0 — 2021-08-11 - 1.1.0 — 2020-09-15 - 1.0.1 — 2020-08-16 - 1.0.0 — 2020-08-16 ## README # RDF String Turtle [![Build status](https://github.com/rubensworks/rdf-string-ttl.js/workflows/CI/badge.svg)](https://github.com/rubensworks/rdf-string-ttl.js/actions?query=workflow%3ACI) [![Coverage Status](https://coveralls.io/repos/github/rubensworks/rdf-string-ttl.js/badge.svg?branch=master)](https://coveralls.io/github/rubensworks/rdf-string-ttl.js?branch=master) [![npm version](https://badge.fury.io/js/rdf-string-ttl.svg)](https://www.npmjs.com/package/rdf-string-ttl) This package contains utility functions to convert between the string-based and [RDFJS](https://github.com/rdfjs/representation-task-force/) representations of RDF terms, quads and triples. _This is a fork of [RDF String](https://github.com/rubensworks/rdf-string.js) that is adapted to make string representation compatible with Turtle/SPARQL syntax._ This allows for convenient and compact interaction with RDF terms and quads, as they can be serialized as plain JSON. Quads are represented as follows: ``` { subject: '', predicate: '', object: '' graph: '' } ``` Different terms types in quads are represented as follows: * **URLs, URIs and IRIs are strings wrapper in `<>``**: `''` * **Literals are represented as double quoted strings**: `'"Tom"'`, `'"Tom"@en-gb'`, `'"Tom"@en-gb--ltr'`, `'"1"^^'` * **Blank nodes are prefixed by `_:`**: `'_:blankNodeName'` * **Variables are prefixed by `?`**: `'?variableName'` ## Usage The following examples assume the following imports: ```javascript import * as RdfDataModel from "rdf-data-model"; import * as RdfString from "rdf-string-ttl"; ``` ### Term to string Convert an RDFJS term to the string-based representation. ```javascript // Prints console.log(RdfString.termToString(RdfDataModel.namedNode('http://example.org'))); // Prints _:b1 console.log(RdfString.termToString(RdfDataModel.blankNode('b1'))); // Prints "abc" console.log(RdfString.termToString(RdfDataModel.literal('abc'))); // Prints "abc"@en-us console.log(RdfString.termToString(RdfDataModel.literal('abc', 'en-us'))); // Prints "abc"@en-us--ltr console.log(RdfString.termToString(RdfDataModel.literal('abc', { language: 'en-us', direction: 'ltr' }))); // Prints "abc"^^ console.log(RdfString.termToString(RdfDataModel.literal('abc', namedNode('http://example.org/')))); // Prints ?v1 console.log(RdfString.termToString(RdfDataModel.variable('v1'))); // Prints empty string console.log(RdfString.termToString(RdfDataModel.defaultGraph())); ``` ### String to term Convert an string-based term to the RDFJS representation. _Optionally, a custom RDFJS DataFactory can be provided as second argument to create terms instead of the built-in DataFactory._ ```javascript // Outputs a named node RdfString.stringToTerm(''); // Outputs a blank node RdfString.stringToTerm('_:b1'); // Outputs a literal RdfString.stringToTerm('"abc"'); // Outputs a literal with a language tag RdfString.stringToTerm('"abc"@en-us'); // Outputs a literal with a language tag and direction RdfString.stringToTerm('"abc"@en-us--ltr'); // Outputs a literal with a datatype RdfString.stringToTerm('"abc"^^'); // Outputs a variable RdfString.stringToTerm('?v1'); // Outputs a default graph RdfString.stringToTerm(''); ``` ### Quad to string-based quad Convert an RDFJS quad to a string-based quad. ```javascript // Prints { subject: '', predicate: '', object: '"abc"', graph: '' } console.log(RdfString.quadToStringQuad(RdfDataModel.triple( namedNode('http://example.org'), namedNode('http://example.org'), literal('abc'), ))); ``` ### String-based quad to quad Converts a string-based quad to an RDFJS quad. _Optionally, a custom RDFJS DataFactory can be provided as second argument to create quads and terms instead of the built-in DataFactory._ ```javascript // Outputs a quad RdfString.stringQuadToQuad({ subject: '', predicate: '', object: '"abc"', graph: '', }); ``` ## License This software is written by [Ruben Taelman](http://rubensworks.net/). These utility functions are inspired by the implementation of [N3.js](https://github.com/RubenVerborgh/N3.js). This code is released under the [MIT license](http://opensource.org/licenses/MIT). --- _Source: https://npm.io/package/rdf-string-ttl · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._