Ebook: Databases, types, and the relational model: the third manifesto

This is a book on database management that is based on an earlier book by the same authors, Foundation for Future Database Systems: The Third Manifesto.  It can be seen as an abstract blueprint for the design of a DBMS and the language interface to such a DBMS.  In particular, it serves as a basis for a model of type inheritance.  This book is essential reading for database professionals.