- exact coverage: the condition that a walk from any leaf chunk to its ancestor root chunk will always encounter exactly one support chunk
- family: the memory allocated when an asset is instanced into its initial set of actors, and all descendant actors formed from fracturing the initial set, recursively
- root chunk: a chunk with no parent
- leaf chunk: a chunk with no children
- lower-support chunk: a chunk that is either a support or subsupport chunk
- subsupport chunk: a chunk that is descended from a support chunk
- supersupport chunk: a chunk that is the ancestor of a support chunk
- support chunk: a chunk that is represented in the support graph
- upper-support chunk: a chunk that is either a support or supersupport chunk
