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.