  In Open Source Software, the source code and any other resources available in
a project can be viewed or reused by anyone subject to often permissive
licensing restrictions. In contrast to some studies of dependency-based reuse
supported via package managers, no studies of OSS-wide copy-based reuse exist.
This dataset seeks to encourage the studies of OSS-wide copy-based reuse by
providing copying activity data that captures whole-file reuse in nearly all
OSS. To accomplish that, we develop approaches to detect copy-based reuse by
developing an efficient algorithm that exploits World of Code infrastructure: a
curated and cross referenced collection of nearly all open source repositories.
We expect this data to enable future research and tool development that support
such reuse and minimize associated risks.
