The advances of the WWW have dramatically increased the need for efficient and flexible mechanisms to provide integration methods for multiple information sources, which has caused a need for a careful integration of the concepts and systems. It is of great importance for issues and concerns to be identified and handled, in order to ensure the continuous building of systems for ever-changing technology and business requirements. Web-Enabled Systems Integration: Practices and Challenges consists of a collection of quality research papers that describe original ideas and insights associated with the task of integration.