@copyof(optional)Points to an element of which the current element is a copy.
                           Value conforms to  data.URI.
                            att.common.anl 
                      | 
                  
                  
                     
                        @corresp(optional)Used to point to other elements that correspond to this one in a generic
                              fashion.
                           One or more values from  data.URI, separated by spaces.
                            att.common.anl 
                      | 
                  
                  
                     
                        @decls(optional)Identifies one or more metadata elements within the header, which are understood to
                              apply to the element bearing this attribute and its content.
                           One or more values from  data.URI, separated by spaces.
                            att.declaring 
                      | 
                  
                  
                     
                        @def(optional)Provides a mechanism for linking the staff to a staffDef element.
                           Value conforms to  data.URI.
                            att.staff.log 
                      | 
                  
                  
                     
                        @facs(optional)Permits the current element to reference a facsimile surface or image zone which
                              corresponds to it.
                           One or more values from  data.URI, separated by spaces.
                            att.facsimile 
                      | 
                  
                  
                     
                        @label(optional)Provides a name or label for an element. The value may be any string.
                           Value of datatype  string.
                            att.commonPart 
                      | 
                  
                  
                     
                        @metcon(optional)Indicates the relationship between the content of a staff or layer and the
                              prevailing meter.
                           Allowed values are:
                           " c"  (Complete; i.e., conformant with the prevailing meter.),  " i"  (Incomplete; i.e., not enough beats.),  " o"  (Overfull; i.e., too many beats.)att.meterconformance 
                      | 
                  
                  
                     
                        @n(optional)A non-negative integer value functioning as a "name".
                           Value of datatype  nonNegativeInteger.
                            staff 
                      | 
                  
                  
                     
                        @next(optional)Used to point to the next event(s) in a user-defined collection.
                           One or more values from  data.URI, separated by spaces.
                            att.common.anl 
                      | 
                  
                  
                     
                        @prev(optional)Points to the previous event(s) in a user-defined collection.
                           One or more values from  data.URI, separated by spaces.
                            att.common.anl 
                      | 
                  
                  
                     
                        @sameas(optional)Points to an element that is the same as the current element but is not a literal
                              copy of the current element.
                           One or more values from  data.URI, separated by spaces.
                            att.common.anl 
                      | 
                  
                  
                     
                        @synch(optional)Points to elements that are synchronous with the current element.
                           One or more values from  data.URI, separated by spaces.
                            att.common.anl 
                      | 
                  
                  
                     
                        @visible(optional)Indicates if a feature should be rendered when the notation is presented graphically
                              or sounded when it is presented in an aural form.
                           Value conforms to  data.BOOLEAN.
                            att.visibility 
                      | 
                  
                  
                     
                        @when(optional)Indicates the point of occurrence of this feature along a time line. Its value must
                              be the ID of a when element elsewhere in the document.
                           Value conforms to  data.URI.
                            att.alignment 
                      | 
                  
                  
                     
                        @xml:base(optional)Provides a base URI reference with which applications can resolve relative URI
                              references into absolute URI references.
                           Value conforms to  data.URI.
                            att.commonPart 
                      | 
                  
                  
                     
                        @xml:id(optional)Regularizes the naming of an element and thus facilitates building links between it
                              and other resources. Each id attribute within a document must have a unique
                              value.
                           Value of datatype  ID.
                            att.id 
                      |