An SQL content repository must contain:
One item descriptor that defines repository items that act as folders (the
folderitem descriptor)One or more item descriptors that define content repository items (the
contentitem descriptors).
Items defined by the content item descriptor implement the atg.repository.content.ContentRepositoryItem interface. Items defined by the folder item descriptor implement the atg.repository.content.FolderItem interface, as well as the atg.repository.MutableRepositoryItem interface.

