| corresp | (corresponds) points to elements that correspond to the current
                              element in some way. 
                                 
                                    | Status | Optional |  
                                    | Datatype | 1–∞ occurrences of 
                                       separated by whitespace |  
                                    | Values | one or more URIs, separated by whitespace. |  | 
                        
                           | synch | (synchronous) points to elements that are synchronous with the current
                              element. 
                                 
                                    | Status | Optional |  
                                    | Datatype | 1–∞ occurrences of 
                                       separated by whitespace |  
                                    | Values | one or more URIs, separated by whitespace. |  | 
                        
                           | sameAs | points to an element that is the same as the current
                              element. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Values | a URI. |  | 
                        
                           | copyOf | points to an element of which the current element is a
                              	copy. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Values | a URI. |  
                                    | Note | 
                                             Any content of the current element should be ignored. Its
                                          	true content is that of the element being pointed at.
                                        |  | 
                        
                           | next | points to the next element of a virtual aggregate of which
                              the current element is part. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Values | a URI. |  | 
                        
                           | prev | (previous) points to the previous element of a virtual aggregate of
                              which the current element is part. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Values | a URI. |  | 
                        
                           | exclude | points to elements that are in exclusive alternation
                              with the current element. 
                                 
                                    | Status | Optional |  
                                    | Datatype | 1–∞ occurrences of 
                                       separated by whitespace |  
                                    | Values | one or more URIs, separated by whitespace. |  | 
                        
                           | select | selects one or more alternants; if one alternant is
                              selected, the ambiguity or uncertainty is marked as resolved. If
                              more than one alternant is selected, the degree of ambiguity or
                              uncertainty is marked as reduced by the number of alternants not
                              selected. 
                                 
                                    | Status | Optional |  
                                    | Datatype | 1–∞ occurrences of 
                                       separated by whitespace |  
                                    | Values | one or more URIs, separated by whitespace. |  
                                    | Note | 
                                             This attribute should be placed on an element which is
                                          	superordinate to all of the alternants from which the
                                          	selection is being made.
                                        |  |