d
IRIs
<em class="rfc2119" title="must">
must
</em>
be
wrapped
with
the
<code>
<
</code> and <code>
>
</code>
characters.
</p>
</div>
<div id="identifying-the-subject" class="section">
<h3>
<span class="secno">
5.2
</span>
Identifying
the
Subject
</h3>
<p>
A
subject
is
declared
using
the
<code>
@
</code>
key.
The
subject
is
the
first
piece
of
information
needed
by
the
JSON-LD
processor
in
order
to
create
the
(subject,
predicate,
object)
tuple,
also
known
as
a
triple.
</p>
<pre class="example">
{
...
  "<spa