Resumen
The advent of the world-wide-web as a digital distribution mechanism for information has emphasized the need for tools to mediate between browsers, servers and databases. What used to be called three-tier client server architecture has been replaced by the web. The actual means to disseminate information widely is now cheap and reliable. This shift from database and client server architectures to Web-based storage and interaction over more heterogeneous data has increased the need for maintaining comprehensive descriptions of data structure, content and other properties. Distributed dynamic systems, also known as dynamic object-based knowledge systems, are increasingly filling the gap between information source and browser queries. These systems comprise knowledge in the form of objects and methods in object frameworks that constrain and contain the domain knowledge needed to answer queries with responses integrated from multiple data sources. These frameworks are dynamic in that they form rapidly evolvable and extensible systems that take advantage of the changing requirements without having to record existing knowledge.

Resumen
The article discusses about the dynamic object technology that can be easily applied to runtime updating problems. Dynamic object technology combines object-oriented programming technology with dynamic linking and updating capabilities. Many programmers are familiar with the program development advantages of dynamic languages, which allow them to quickly redefine functionality in a running system, and switch instantly to the newly defined functionality. Dynamic object technology excels in several areas: It is ideal for runtime configuration, without needing to access source code. It uses techniques of reflection, meta-data, and meta-object protocols. It permits ongoing evolution, even in systems that are completely operational. Dynamic objects are the new wave of the future, appearing in applications for workflow management, process control, switch management, database management, decision support, scheduling and planning, and Web serving. This article presents examples illustrating the application of dynamic object technology to problems requiring more flexible software applications.