| Attributes | att.canonical (@key, @ref) 
    | role | may be used to specify further information about the entity referenced by
this name, for example the occupation of a person, or the status of a place. |  | nymRef | (reference to the canonical name) provides a means of locating the canonical form
      (nym) of the names associated with the object
       named by
      the element bearing it. | Status | Optional |  | Datatype | 1–∞ occurrences of separated by whitespace |  | Values | One or more valid identifiers, separated by
      whitespace. |  | Note | The value must point directly to one or more XML elements
        by means of one or more URIs, separated by whitespace. If more
        than one is supplied, the implication is that the name
        is associated with  several distinct canonical names. | 
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