| Attributes | att.global (@xml:id, @n, @xml:lang, @rend, @rendition, @xml:base, @xml:space)  (att.global.linking (@corresp, @synch, @sameAs, @copyOf, @next, @prev, @exclude, @select))  (att.global.analytic (@ana))  (att.global.facs (@facs))  (att.global.change (@change)) 
    | scheme | identifies the foliation scheme in terms of which all the
      locations contained by the group are specified. | Status | Optional |  | Datatype |  |  | Values | A pointer to some  foliation element which
      defines the foliation scheme used, or an external link to some
      equivalent resource. | 
 |  |