Wikidata is a central storage for knowledge and data. Any content in wikidata is described as item. Each item has certain identifiers like label, description and aliases. Items can be readable and editable by human and machines. All wiki related projects like Wikipedia and Wikisource store their contents in Wikidata. It is a free service so that using Wikidata contents is allowable for any purpose.

Wikidata provides API access via Wikidata Query Service (WDQS). Developers can access data by running queries through SPARQL endpoints. However, it is not practical to fetch and edit data or perform large-scale analyses by using only SPARQL.

Wikidata Toolkit is a java library developed to benefit from WDQS in an effective way.

The latest stable Wikidata Toolkit release is version 0.11.1. In order to use this version, the following dependency is added to pom.xml file for Maven projects:

<dependency> 
    <groupId>org.wikidata.wdtk</groupId>
    <artifactId>wdtk-wikibaseapi</artifactId>
    <version>0.11.1</version>
</dependency> 

The details about Wikidata Toolkit can be found on pages as shown below:

• Wikidata Toolkit Project Homepage
• Wikidata Toolkit Source Code
• Wikidate Toolkit Examples