List of lesser used interfaces

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