The ongoing challenge in the Open Data community is to understand where restrictions on data exist, and to create grounds for public appeal to data owners for changes to terms of use. While the discussion is taken to a high political level on certain widely acknowledged datasets, there are many relevant and useful sources of information, which may even be published online and accessible, yet are still not open due to their legal definition - or lack thereof!

An option for most people is to go through a Freedom of Information request process, but they may not be willing to go “all the way”. Something like an Open This Data! button, even just a simple hashtag, could quickly start a wider community appeal. It would be interesting to both data activists and researchers to know where there is data that is going unused due to licensing.

As Opendata.ch president André Golliez recently said in an interview “the legal situation (of open data) is one of the largest medium-term problems. There are many constraints, such as on how data can be published. Everybody is anchored in law. Only data on which no restrictions are attached, should be open.”

Let's give people a quick and easy way to express their wish that the data be free! Let's do it in consultation with legal bright minds at OKFN. Here are some possible hackday goals:

1. Start crowdsourcing a database of not-so-open data
2. Develop an easy way of sharing dataset restrictions, like a browser bookmarklet button
3. Seed the database and create an early visualization, a preview of the “not-so-open-data map”

Further links:

• The Open Data Certificate is a badge for truly open data (in varying degrees of truly) https://certificates.theodi.org/
• The Open Definition website has buttons for publishers of open content http://opendefinition.org/buttons/
• PyBossa is a Citizen Science framework that could be adapted as a tech platform http://dev.pybossa.com/
• The OKFN's Frictionless Data effort should be expanded to cover the legal status of data sets http://data.okfn.org/about
• Freedom of Information websites could be a trove of data on existing appeals for data openness https://github.com/mysociety/alaveteli/wiki/List-of-foi-websites-and-projects
• GitHub has recently taken a similar initiative to encourage licensing of projects https://help.github.com/articles/open-source-licensing
• An inspiration for this is a parallel initiative, the Open Access Button, who are going to be also taking part at OKCon http://oabutton.wordpress.com/

Open this data! button… http://datalets.ch:7000/#

As described above the button allows users to draw attention to datasets which are not accessible to them. A brief discussion about the potential use of the button uncovered a number of nuances concerning the accessibility of datasets. We realised that it would be useful to not just capture a simple instance of when data is unavailable, but also to find out in context someone is failing to access the dataset (be it an academic, commercial or government context for example); and what type of barriers are in there way, with legal and technical barriers being the main two hindrances we identified. To make the information we're collecting a little more interesting further still, we also collect some location data so that we might map where these problems are cropping up.

Our GitHub repository: https://github.com/wfyson/OpenDataButton

• List and link your actual and ideal data sources.

• Oleg Lavrovsky, Opendata.ch
• Will Fyson, University of Southampton

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