<ul>
<li>The keyword <code>bulk</code> is encoded in ASCII, and the spaces are always exactly one ASCII space
<li><i>actor</i> is a sequence of Unicode characters, encoded in UTF-8, containing no spacesor colons<li><i>type</i> is a sequence of Unicode characters, encoded in UTF-8, containing no spacesor colons
<li><i>length</i> is a sequence of decimal ASCII digits
<li><i>data</i> is a sequence of bytes whose length is <i>length</i> interpreted as a number