Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. XML Interface for Network Services (XINS) is an open source technology for definition and implementation of internet applications, which enforces a specification-oriented approach. Open source describes practices in production and development that promote access to the end product''s source materials typically, their source code. Some consider open source a philosophy, others consider it a pragmatic methodology. Before the term open source became widely adopted, developers and producers used a variety of phrases to describe the concept; open source gained hold with the rise of the Internet, and the attendant need for massive retooling of the computing source code. Opening the source code enabled a self-enhancing diversity of production models, communication paths, and interactive communities.