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