E&S CVS Commit: PEAK - Added 'StorableDM' base class, for DM's that are themselves persistent

[pje at eby-sarna.com]

Module Name:	PEAK
Committed By:	pje
Date:		Mon Mar 31 04:06:11 UTC 2003

Modified Files:
	PEAK/src/peak/storage: data_managers.py

Log Message:
Added 'StorableDM' base class, for DM's that are themselves persistent
objects.  This will be used for XMI DM's later, so that they can be loaded
or saved from a file.


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