Software Package Builder 2.0 User's Guide (February 2007)

Software Packaging
Software Package Structure
Chapter 226
Software Package Hierarchy
The software package hierarchy provides the structure needed by the
filesystem to identify packaged files. Figure 2-2 provides a graphical
representation of the hierarchical structure to which a valid PSF must
adhere.
Figure 2-2 Software Package Hierarchy
Containment vs.
Reference
There are two types of relationships that exist within the hierarchical
structure of a software package: containment and reference. If a
software element acts as a container, then the software elements it is
comprised of are physically contained. If a software element acts as a
reference, then the software elements it is comprised of are virtually
contained.