org/ns/activitystreams",
    {"foo": "http://example.org/foo"}
  ],
  "type": "Note",
  "content": "This is a simple note",
  "foo": 123,
  "bar": 321
}</pre></figure>

      <p>
        An implementation that receives this Note object can choose to parse
        the object as an ordinary JSON object or it can use the standard
        JSON-LD Expansion algorithm.
      </p>

      <p>
        If the implementation chooses to parse the object as ordinary JSON
        and then reserializes the object (e.g. fo