e>
key.
However,
authors
may
name
blank
nodes
by
using
the
special
<code>
_
</code>
CURIE
prefix.
</p>
<pre class="example">
{
...
  "@": "<span class="diff">_:foo</span>",
...
}
</pre>
<p>
The
example
above
would
set
the
subject
to
<code>
_:foo
</code>,
which
can
then
be
used
later
on
in
the
JSON-LD
markup
to
refer
back
to
the
named
blank
node.
</p>
</div>
</div>
<div id="advanced-features" class="section">
<h2>
<span class="secno">
6.
</span>
Advanced
Features
</h2>
<p>
JSON-LD
has
a
number
of
features
th