rays of arrays" as used, for example, by the popular
        <a href="http://geojson.org/">GeoJSON</a> specification. While
        implementations are free to use such constructs as extensions within an
        Activity Streams 2.0 document, consumers that use the standard JSON-LD
        Processing Algorithms will be required to either ignore such extensions
        or map those to alternative compatible constructs prior to applying the
        JSON-LD algorithms. Simple GeoJSON Points, for instance, can 