This work covers commercial applications that make immediate advances and gains insight into the evolution of Semantic Web technology. Machine-understandable metadata is emerging as a new foundation for component-based approaches to application development, where Web services represent the latest architectural advancement. RDF Servers enable these two concepts to be synthesized providing powerful new mechanisms for modelling, creating and deploying complex applications. Applications trying to achieve the above goal through the use of other specifications such as WSDL, UDDI, SOAP, ebXML, XML, possibly in conjunction with transformation languages such as XSLT and RuleML are also covered. It focuses on real applications attacking real world problems. This potentially means pragmatic decisions caused by the limitations of today's technology.