More and more organizations are relying on online and electronic means to grow their business, improve efficiencies, and cut costs. This increased reliance on Internet and networked technologies to meet business goals is forcing organizations to deliver ‘always on’ availability to maximize revenues and satisfy customer expectations. Downtime for such applications can mean an immediate loss in revenues. For example,
To say that the technology field, and database management in particular, has changed significantly in the nine years since the second edition of this book was published would be an understatement, to be sure. Small, handheld devices containing storage capacity and processing power that once would have required several room-sized mainframe computers are now so ubiquitous that many people take them for granted, especially the more recent generations. (My young nephew would likely never understand the excitement I experienced when I purchased my first 40MB storage expansion card for my IBM PC. But that’s another story.) Database management systems can now handle terabytes of data, and there’s recently been a considerable amount of emphasis on storing, managing, and accessing data “in the cloud.”
The Unified Modeling Language (UML) is a graphical language for visualizing,specifying, constructing, and documenting the artifacts of a software-intensive system.The UML offers a standard way to write a system's blueprints, including conceptual things such as business processes and system functions as well as concrete things such as programming language statements, database schemas, and reusable software components.