People working in a database-driven intranet or Web-based systems often face the problem how to uniformly access data from heterogeneous local and remote sources. This book combines the functional style of programming with a view of data that is not confined to the well known array and record structures. Programs are written in a style that is independent of data storage representation and thus it becomes easier to compute with a mix of data that comes from different kinds of databases: object oriented to triple store or semi-structured or relational. Readers will learn how the high level of abstraction will enable them to recompile their programs for different storage schemas thus avoiding many of the problems of legacy software.
