A manifest element is a container for data structures whose contents describe a
semantically complete instance of the IMS Content Packaging Information Model.
A manifest element may contain and reference child manifest elements
in the same IMS Manifest document. The root manifest element defines an
entire IMS Package. A child manifest element defines a semantically complete
subset of that Package.
Represents a binding of the kinds of objects defined as children of ims-cp-imManifest : Manifest.[ ManifestMetadata, Organizations, Resources, Manifest, Extension ].