Base class for Library and Archive
There is only one global instance: Archive.global, or Library.global, which is initialized automatically in the subclasses.
Subclass responsibility
Clear the dictionary
Access the dictionary at a path with keys. The keys may be any object, but are usually Symbols.
Store an object in the dictionary at a path, given as a list of keys and the object to be stored as last argument. The keys may be any object, but are usually Symbols.
Access the dictionary at a path, given as a list of keys. The keys may be any object, but are usually Symbols.
Store an object in the dictionary at a path, given as a list of keys and the object to be stored as last argument. The keys may be any object, but are usually Symbols.