| corresp | (corresponds) points to elements that correspond to the current
      element in some way. | Status | Optional |  | Datatype | 1–∞ occurrences of separated by whitespace |  | Values | one or more URIs, separated by whitespace. | 
 | 
    | synch | (synchronous) points to elements that are synchronous with the current
      element. | Status | Optional |  | Datatype | 1–∞ occurrences of separated by whitespace |  | Values | one or more URIs, separated by whitespace. | 
 | 
    | sameAs | points to an element that is the same as the current
      element. | Status | Optional |  | Datatype |  |  | Values | a URI. | 
 | 
    | copyOf | points to an element of which the current element is a
	copy. | Status | Optional |  | Datatype |  |  | Values | a URI. |  | Note | Any content of the current element should be ignored. Its
	true content is that of the element being pointed at. | 
 | 
    | next | points to the next element of a virtual aggregate of which
      the current element is part. | Status | Optional |  | Datatype |  |  | Values | a URI. | 
 | 
    | prev | (previous) points to the previous element of a virtual aggregate of
      which the current element is part. | Status | Optional |  | Datatype |  |  | Values | a URI. | 
 | 
    | exclude | points to elements that are in exclusive alternation
      with the current element. | Status | Optional |  | Datatype | 1–∞ occurrences of separated by whitespace |  | Values | one or more URIs, separated by whitespace. | 
 | 
    | select | selects one or more alternants; if one alternant is
      selected, the ambiguity or uncertainty is marked as resolved. If
      more than one alternant is selected, the degree of ambiguity or
      uncertainty is marked as reduced by the number of alternants not
      selected. | Status | Optional |  | Datatype | 1–∞ occurrences of separated by whitespace |  | Values | one or more URIs, separated by whitespace. |  | Note | This attribute should be placed on an element which is
	superordinate to all of the alternants from which the
	selection is being made. | 
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