| wit | (witness or witnesses) contains a list of one or more pointers indicating the witnesses
                              which attest to a given reading. 
                                 
                                    | Status | Mandatory when applicable |  
                                    | Datatype | 1–∞ occurrences of 
                                       separated by whitespace |  
                                    | Values | A space-delimited series of sigla; each sigil should correspond
                                       to a witness or witness group and occur as the value of the
                                       xml:id attribute on a witness element elsewhere in the
                                       document. |  
                                    | Note | If the apparatus contains readings only for a single
                                          witness, this attribute may be consistently omitted.
                                        This attribute may occur both within an apparatus
                                          gathering variant readings in the transcription of an individual
                                          witness and within an apparatus gathering readings from different
                                          witnesses.
                                        Additional descriptions or alternative versions of the sigla referenced may be
                                          supplied as the content of a child wit  element.
                                        |  | 
                        
                        
                           | type | classifies the reading according to some useful typology. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Sample values include: | 
                                          substantivethe reading offers a substantive variant.orthographicthe reading differs only orthographically, not in substance,
                                             from other readings.
                                           |  | 
                        
                        
                           | cause | classifies the cause for the variant reading, according to
                              any appropriate typology of possible origins. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Sample values include: | 
                                          homeoteleutonhomeoarchypaleographicConfusionhaplographydittographyfalseEmendation |  | 
                        
                        
                           | varSeq | (variant sequence) provides a number indicating the position of this reading in a
                              sequence, when there is reason to presume a sequence to the variants
                              on any one lemma. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Values | a positive integer |  
                                    | Note | Different variant sequences could be coded with distinct
                                          number trails: 1-2-3 for one sequence, 5-6-7 for another.  More
                                          complex variant sequences, with (for example) multiple branchings
                                          from single readings, may be expressed through the join 
                                          element.
                                        |  | 
                        
                        
                           | hand | signifies the hand responsible for a particular reading in the
                              witness. 
                                 
                                    | Status | Optional |  
                                    | Datatype |  |  
                                    | Values | must be one of the hand identifiers declared in the document
                                       header (see section 11.4.1 Document Hands). |  
                                    | Note | This attribute is only available within an apparatus
                                          gathering variant readings in the transcription of an individual
                                          witness.  It may not occur in an apparatus gathering readings from
                                          different witnesses.
                                          
                                        |  |