Openness in science is key to fostering progress via transparency, reproducibility and replicability. While open access and open data are two fundamental pillars in open science, it is open data that builds the core for excellence in evidence-based research. This is why I have striven for years to bring open science practices, including open access and open data, to software engineering research.
While I am working to turn that recommending into a demanding (we are getting there), several authors have approached me with the fear of doing the wrong thing when double-blind review and data sharing are occurring at the same time. Indeed, the process is simple but it is true that once data is properly open data and archived, there is no turning back.
First, I want to repeat for the nth time: please, do not serve preprints, postprints, and datasets, from non-persistent systems such as your personal website–being it on your personal server or your institution’s server–or consumer cloud storage (e.g., Dropbox, Google Drive). All these systems are really volatile, and data will eventually disappear over sometimes short periods of time5.
Science and research need your produced knowledge in perpetuity–and yes, any of your produced knowledge is precious to us. This is why your data (and pre/postprints) should be released under a proper license and stay in archived repositories where nobody, not even you, can delete it.
Enter figshare.com6 and Zenodo.org. Figshare and Zenodo are two disciplinary-agnostic platforms for archived open data. Both provide the same functionality. The former is for profit but run by open science activists, the latter is not-for profit and backed by OpenAIRE and CERN. Both are free to use for users. Both provide the same functionalities. Figshare content is archived and distributed with CLOKSS. Zenodo, as far as I know, does not use any further digital preservation and archival system but it is hosted at CERN, which brings fair confidence on their data preservation abilities.
Alright, let’s do this. I will first describe the steps for figshare and then for Zenodo. I am assuming that you already have:
- an anonymized dataset which is ready to be seen by third-party people as well as machines.
- an account on either figshare or Zenodo. You do not need an anonymous/dummy account.
I have created a dummy dataset named test.csv that I will use for both figshare and Zenodo.
Double-blind data submission on figshare
Once you start a submission in figshare, you need to fill in details such as title, authors, submission categories, item type, keywords, and description.
You can provide unblinded author details here already. Author details be blinded once the item is published for double-blind review. Make sure that title and description are blinded. These fields will become visible instead.
Here comes the important part. Be sure to Generate a private link and do not flag the Publish option. The following screenshot shows the correct flags already.
There is no need to flag the options Apply embargo, Make file(s) confidential7 , and Reserve Digital Object Identifier.
After you double-check that the Publish is not flagged, you can save the item.
Include the private URL on your submission. In my case, the private URL was https://figshare.com/s/9cfe7e5d1d07140ff285.
This is what reviewers see when they access your dataset from the private URL:
The dataset is nicely previewed and can be downloaded. Title, category, and description are shown. Author details and your username are not shown. You are all set. The dataset is private to you and to those who are aware of private URL. The dataset is not indexed by figshare.
Important: private URLs at figshare expire after 12 months and can be extended by contacting support. This is on purpose to avoid using private URLs as final placeholders.
Open data upon acceptance on figshare
Congratulations for getting your paper accepted. There are now only three steps required to make your figshare submission open data.
- Pick either the CC0 or the CC-BY 4.0 license. The former is equivalent to make the data public domain (cannot bee more free than this). The latter requires attribution when re-using the data and allows any kind of reuse8. Please note that former versions of the CC-BY license are not properly worded for data.
- Flag the
- Use the DOI you have just received to properly reference your open data in your paper.
Here is my now published test file [UPDATE: this particular test file was removed manually by figshare as a test upload does not comply with their terms and conditions]:
Graziotin, Daniel (2018): Test upload to demonstrate private sharing for peer review and DBR. figshare. Dataset. DOI: 10.6084/m9.figshare.7048631.v1.
Done. You are now an open science hero and my personal hero.
Double-blind data submission on Zenodo
Zenodo also allows submissions of blinded data, but I find the process less intuitive and with a twist. As far as I know, the only way to make a submission double-blind compliant is to effectively publish the submission as open access [sic] and blind all details. Other options will either make the file not available ( Embargo access or Closed access options) or reveal your username in the request process ( Restricted access option).
Important: your dataset will be anonymous and double-blind compliant. However, the file will be publicly accessible and indexed in Zenodo.
First, upload your dataset. Make sure to click the green Start upload button after you have chosen your dataset.
Fill in the various details but make sure to never reveal identifying information. The following part differs from figshare approach: write Anonymous for the author first and last name. You are using your account for uploading the item, but the published data will show Anonymous as author and your username will not be revealed.
As explained above, select Open Access as access right.
Save and then publish the dataset. Use the obtained DOI to reference the dataset in your double-blind submission.
This is what reviewers will see:
Open data upon acceptance on Zenodo
Congratulations for getting your paper accepted. There are only two steps required to make your Zenodo submission open data. Actually, it was open data already. You need to unblind it now.
- Fill in the actual author details instead of the Anonymous entry.
- Use the DOI to properly reference your open data in your paper.
That was it. Feel free to contact me in case of questions or leave a comment below. Especially if I missed something with Zenodo.
- This post is aimed to the software engineering research community, but it actually works with any discipline.
- I have so far worked with CHASE, MSR, PROFES, ESEM, and ESEC/FSE [to be defined] on open science policies as well as serving as open science chair on all of them but MSR. Fun trivia: the CHASE workshop has been the first software engineering venue to implement open science policies, in 2016. While I am at it, I would like to deeply thank Daniel Méndez for his support and his attempts to introduce open science practices in conferences and involving me on the matter.
- Archived means that there are mechanisms in place to make sure that data is properly preserved, duplicated, and distributed in a way that it will survive even the hosting platform. See for example LOCKKS and CLOKKS.
- The approach is also compatible with single blind review and open peer review.
- This has been empirically demonstrated , .
- Full disclosure: I am a figshare advisor. If you ask me which one should you pick between figshare and Zenodo, my answer will be biased.
- Make file(s) confidential is an option for when only metadata should be made publicly available. In software engineering research, we are likely to never use it.
- Some have asked me why not opting for the CC BY-NC 4.0, which does not allow commercial use of your data. Here is why .
- See footnote 7.