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