Package alias is a subset of the interfaces defined by pdata and family package to allow for higher code reuse without using generics.

Package migrate provides the functionality to take action on specific schema fields that are consumed by the translation package.

Package race exists so that it can be possible to check if the race detector has been added into the build to allow for tests that provide no unit test value but perform concurrent actions where the race detector can identify issues.

Package transformer contains various Transformers that represent a high level operation - typically a single "change" block from the schema change file.