Writing XML can be quite challenging. Using a good editor with autocomplete capabilities along with the provided XML Schema can be of great help. But it is still quite complicated, especially as the project gets bigger and involves multiple files. The System Designer UI tool can help ease this process and manage the complexity of a large system. System Designer is a tool that allows you to graphically design and configure all the aspects of a Connext distributed system. Think of it as a user interface (UI) to XML-Based Application Creation, a technology that allows you to specify in XML format all the aspects of a DDSTM system.