Researchers should decide which data sets will be shared, considering, among other things, their reuse prospects and the costs involved. The following checklist provides several criteria to consider.
Data to be shared should comply with the confidentiality, security, and legal requirements with regard to personal and sensitive data, as is often the case in the medical field. In order to do this, the data must be anonymized.
For information purposes only, consult the checklist @ The University of British Columbia: Data Privacy and Information Security - Researcher Checklist.
In Canada, raw data is generally not protected by the Copyright Act.
It is mandatory to choose a license to share your data.
A decision tree to determine if a researcher has the right to make their data open was created by Force11, "a community of scholars, librarians, archivists, publishers and research funders that has arisen organically to help facilitate the change toward improved knowledge creation and sharing".