sparql-builder

SPARQL query builder written in TypeScript. Can be used from both TypeScript and JavaScript, although type-safety is lost in JavaScript.

It exposes the following classes:

• QueryBuilder - builder base class
  • SelectBuilder - SELECT query builder
  • DescribeBuilder - DESCRIBE query builder

Usage

The builder is published as sparql-builder package on npm. Import it into your package.json:

    "dependencies": {
        "sparql-builder": "^1.0.6"
    }

Example:

Code in test.ts:

import { SelectBuilder } from 'sparql-builder';
 
let query = "SELECT ?s { ?s ?p ?o }";
 
let builder = SelectBuilder.fromString(query).
    limit(42).
    offset(66).
    orderBy(SelectBuilder.ordering(SelectBuilder.var("s"), true)).
    orderBy(SelectBuilder.ordering(SelectBuilder.var("p")));
 
console.log(builder.toString());

Output of tsc && node test.js:

SELECT ?s WHERE { ?s ?p ?o. }
ORDER BY DESC (?s) (?p)
OFFSET 66
LIMIT 42