Misc. interfaces

GnomeDbEntity - Interface to represent a generic entity (for tables, views or queries)
GnomeDbField - Interface to represent a generic field (for tables's fields, etc).
GnomeDbXmlStorage - Interface which provides saving and loading using XML structures
GnomeDbRenderer - Interface to get representations of objects as SQL statements, XML nodes or human readable text
GnomeDbReferer - Interface to know when on object is completely defined