This page discusses where you can download the calculator software, how to implement it on your website and under what license this software is made available.


The Public Domain Calculator is part of EuropeanaLabs, an open source repository that supports the development of Europeana.

You can check out (read only) the source code on the subversion system of EuropeanaLabs using:

svn checkout    

Different compiled formats of the Public Domain Calculator are available:

Integrate Compiled Source into your own Website

To add a Public Domain Calculator to your website, you can download the compiled source. The calculator is developed using Google WebToolkit and is compiled to javascript.

Add the following line to the head of your HTML to include the software:

<script type="text/javascript" language="javascript" src="pdcalculator/PublicDomainHelperTool/PublicDomainHelperTool.nocache.js"></script>

Place the following divs on your webpage to enable the interface of the calculator:

<!-- OPTIONAL: include this if you want history support -->
<iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1' style="position:absolute;width:0;height:0;border:0"></iframe>

<div id='calculator'>
	<div id="content"></div>
	<div id="controls"></div>

Integrate Software into a Backend System

The Public Domain Calculator is written in java using Google WebToolkit, rewriting the interface methods using another interface library will not proof to be difficult with the architecture of this tool.

You can also write a tree walker module that can read the developed xml format in the programming language of your choice. Please check the source code for an example of a tree walker for this format.

You can contact Maarten Zeinstra if you have any questions concerning the implementation of the Public Domain Calculators on your own platform.


This software is licensed under a EUPL v1.1 license.

You are free to:

As long as you:

Click here for additional persmissions and information about this license.