The article "Web Services: Theory and Practice" discusses the use of XML as the foundation of Web Services, including Microsoft's UDDI, SOAP, and Java Web Services. It also covers deploying and managing Web Services effectively. The main goal is to provide a comprehensive overview of Web Services and their practical applications. The key findings include the importance of XML in enabling communication between different systems, the role of UDDI in discovering available services, and the use of SOAP for exchanging data. Overall, the article emphasizes the significance of Web Services in modern technology and the need for efficient deployment and management strategies.