The 
witDetail element should be regarded as a
    specialized type of 
note element; it is synonymous with
    
<note type='witnessDetail'>, but  differs from the
 in the omission of some attributes
    seldom applicable to notes within critical apparatus, and in the
    provision of the 
wit attribute, which permits an
    application to extract all annotation concerning a particular
    witness or witnesses from the apparatus. It also differs in that
    the location of a 
witDetail element is not significant
    and may not be used to imply the point of attachment for the
    annotation; this must be explicitly given by means of the
    
target attribute.