  Reuse of data in new contexts beyond the purposes for which it was originally
collected has contributed to technological innovation and reducing the consent
burden on data subjects. One of the legal mechanisms that makes such reuse
possible is purpose compatibility assessment. In this paper, I offer an
in-depth analysis of this mechanism through a computational lens. I moreover
consider what should qualify as repurposing apart from using data for a
completely new task, and argue that typical purpose formulations are an
impediment to meaningful repurposing. Overall, the paper positions
compatibility assessment as a constructive practice beyond an ineffective
standard.
