Affiliations were `xlink`ed even in the articleauthoring tag set, but
`<aff>` are not allowed as children of `contrib-group` elements in that
tag set. Each affiliation must be listed directly in the contrib
element.
The partitioning the components of a name into surname, given names,
etc. is not always possible or not available. Using `author.name` allows
to give the full name as a fallback to be used when `author.surname` is
not available.
