The reusable custom-defined nestable compound data type for construction of database objects of one or more embodiments of the invention provide advantages over traditional non-reusable structured tables of RDBM systems. The data structure of one or more embodiments of the invention may be thought of in part as a generalized form of a user defined compound data type that may be used to model various “exotic” data structures, such as flexible hierarchies and networks, in database schema. Thus, the system, methods and data structures of one or more embodiments of the invention may be used to define and instantiate structures that support the creation of flexible nested records that expose the relationship between parent records and private child sub-records in a database schema.