SPARQL Tool

Javascript tool that can be easily embedded into another web projects. The tool is written in Typescript using JQuery and translated for ECMAScript 5.

Features

• send a SPARQL query to a specified SPARQL endpoint
• write the result of the query into a table and visualize it at a specific location on the website
• load/save query to browser local storage
• manage saved queries
• search saved queries
• queries version control

Usage

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="sparqljs.js"></script>

SPARQL Client

Create a new instance

var sparqlTool = new SPARQL();

Optionally, you can provide a custom target element to the constructor as a new place to render results:

var sparqlTool = new SPARQL("#target-element");

Send SPARQL query

sparqlTool.plaintext_query('URL', 'SELECT ?s ?p ?o ((5) as ?i) WHERE{ ?s ?p ?o } LIMIT 10');

Opionally, you can provide callbacks to manage response on success and error. Default callback render data into specified target and error callback print error into console.

sparqlTool.plaintext_query(
        'URL', 
        'SELECT ?s ?p ?o ((5) as ?i) WHERE{ ?s ?p ?o } LIMIT 10',
        successCallableFunction,
        errorCallableFunction
);

Query Manager

var queryManager = new QueryManager(); // Load queries from local storage or create new one

Manage operations with local storage. Also provide methods for query version control.

queryManager.storeQuery('example1', 'SELECT ?s ?p ?o ((5) as ?i) WHERE{ ?s ?p ?o } LIMIT 10'); // true (version 0)
queryManager.modifyQuery('example1', 'SELECT ?s ?p ?o ((5) as ?i) WHERE{ ?s ?p ?o }'); // 1 (version 1)
queryManager.loadLatestQuery('example1'); // 'SELECT ?s ?p ?o ((5) as ?i) WHERE{ ?s ?p ?o }'
queryManager.loadQuery('example1', 0); // 'SELECT ?s ?p ?o ((5) as ?i) WHERE{ ?s ?p ?o } LIMIT 10'
queryManager.rollbackQuery('example1'); // 0 (actual version, version 1 no longer exists)
queryManager.removeQuery('example1'); // true
queryManager.save(); // save changes into local storage

License

This software is written by Martin Matas.

This code is released under the MIT license.