**The following post is from [Jonathan Gray](http://jonathangray.org/), Community Coordinator at the [Open Knowledge Foundation](http://okfn.org/).**
As many of you will know, the [Public Domain Calculators](http://publicdomaincalculators.okfn.org/) aim to make it easier to find out which works are in the public domain in a given jurisdiction. There are two main parts of the project:
1. [A collection of flowcharts](http://publicdomaincalculators.okfn.org/flowcharts/), mapping copyright laws in different countries
2. [A library of code](http://publicdomaincalculators.okfn.org/code/) (part of [PublicDomainWorks.net](http://www.publicdomainworks.net))
Recently we’ve been doing a bit of work to make the Public Domain Calculator code into a standalone library that can be integrated into lots of different software packages and services. The library has been stripped down of all the code from PublicDomainWorks.net and is now available at:
Our long-term vision is to turn the Public Domain Calculators into a code library which can be plugged into different software or websites that interface with a variety of archives, repositories, library catalogues, and so on. Because all of the code and content is open, all of the legal reseach can be peer reviewed and the algorithms can be optimised and improved.
If you’re interested in getting involved, please visit:
If you want to find out more you can also [watch our short video](http://publicdomaincalculators.okfn.org/) about the project!