The DesignBuilder XML User Guide provides an overview of the structure and elements within the DesignBuilder data set, with a focus on exporting and importing models in XML format. Pdf documents in the docs folder explain the organization of model data, the hierarchy of objects, and the specifics of geometry and additional features such as HVAC networks and assemblies.
DesignBuilder.xsd defines attribute structure in the DesignBuilder model tree. The file can be visualized in Visual Studio XML Schema Explorer.