The standard library issue_unique_id package implements issuing unique Id values, useful for identifying records since record addresses can change 200 times per second due to the garbage collector. In practice most code will instead use the version implemented in src/lib/core/init/pervasive.pkg.
The issue_unique_id package implements the Issue_Unique_Id api.
The issue_unique_id package source code is in src/lib/src/issue-unique-id.pkg.
The above information is manually maintained and may contain errors.