| dx:class | 
                                 xs:string | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             defines what is the parent class used to validate the content of this element. Additional information may be used to limit the scope of the element, like actual values  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | dx:href | 
                                 xs:string | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             To provide a link to the element definition in case the inforamtion is coming from an external file.
The link would correpsond to a xlink.  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | dx:mixed | 
                                 xs:boolean | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             to express whether the element can have mixed cotnent or not (element, attribute and text or just elements and attributes)  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | dx:name | 
                                  | 
                                  | 
                                  | 
                                 required | 
                                  | 
                                 
                                    
                                       
                                          
                                             The actual element tag name  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | dx:sinceVersion | 
                                 xs:string | 
                                  | 
                                  | 
                                 optional | 
                                  | 
                                 
                                    
                                       
                                          
                                             Alows to express the fact that a certain information is available since a certain XFT version  | 
                                           
                                        
                                     
                                  | 
                              
                              
                                 | dx:type | 
                                 dx:element_typeType | 
                                  | 
                                  | 
                                 required | 
                                  | 
                                 
                                    
                                       
                                          
                                             the type of element can be element, attribute or value at present. In case of value, the dx:name element would correspond to the actual value  | 
                                           
                                        
                                     
                                  |