In order to apply a system such as HYDRAA, PEDRO etc. to the SDSS framework a System tag - as shown below - has to be set. Access is possible via different areas of the user interface, i.e. via the menu, key word catalogue or toolbar.
In both extracts (DTD and XML) the basic structure (at the top) and the special IMPETUS system, with its particular attributes, are portrayed.
General (!) system definition with comments in the DTD document.
Specific IMPETUS document header in the XML file on the basis of the DTD structure.