--- a/spec/latest/json-ld-api/index.html	Wed Feb 13 12:21:36 2013 +0100
+++ b/spec/latest/json-ld-api/index.html	Wed Feb 13 13:33:40 2013 +0100
@@ -4653,9 +4653,9 @@
   <section>
     <h3>Callbacks</h3>
 
-    <p>JSON-LD processors utilize callbacks in order to return information in an
-      asynchronous manner to calling applications. This section details the
-      parameters sent to those callbacks.</p>
+    <p>JSON-LD processors utilize callbacks in order to exchange information in
+      an asynchronous manner with applications. This section details the
+      parameters of those callbacks.</p>
 
     <section>
       <h3>JsonLdCallback</h3>
@@ -4672,6 +4672,41 @@
         <dd>The processed JSON-LD document.</dd>
       </dl>
     </section>
+
+    <section>
+      <h3>HttpClientCallback</h3>
+      <p>The <a>HttpClientCallback</a> defines the callback that custom HTTP
+        clients have to implement to be used to retrieve remote contexts.</p>
+
+      <dl title="callback HttpClientCallback = void" class="idl">
+        <dt>DOMString url</dt>
+        <dd>The URL of the remote context to retrieve.</dd>
+        <dt>ContextRetrievalCallback callback</dt>
+        <dd>The callback that is called when the remote context has been
+          successfully retrieved or an error preventing it's retrieval has been
+          detected.</dd>
+      </dl>
+    </section>
+
+    <section>
+      <h3>ContextRetrievalCallback</h3>
+      <p>The <a>ContextRetrievalCallback</a> is called in response to a call
+        of the <a>HttpClientCallback</a>.</p>
+
+      <dl title="callback ContextRetrievalCallback = void" class="idl">
+        <dt>JsonLdError error</dt>
+        <dd>If the value is <tref>null</tref>, then no issue was detected
+          during processing. Otherwise, a processing issue was detected and
+          the details are contained within the <em>error</em> object. All
+          errors MUST have a <a>JsonLdErrorCode</a> of
+          <code class="error">loading remote context failed</code>.</dd>
+        <dt>DOMString url</dt>
+        <dd>The final URL of the retrieved JSON-LD context. This is important
+          to handle HTTP redirects properly.</dd>
+        <dt>DOMString context</dt>
+        <dd>The unparsed content of the retrieved JSON-LD context.</dd>
+      </dl>
+    </section>
   </section>
 
   <section>
@@ -4693,6 +4728,15 @@
             base IRI along with the compacted document. This might be problematic in practice and
             thus the default behavior might be changed in future.</p>
         </dd>
+        <dt>HttpClientCallback httpClient</dt>
+        <dd>The callback of the HTTP client to be used to retrieve remote contexts.
+          If specified, it MUST be used to retrieve remote contexts; otherwise, if not specified,
+          the processor's built-in HTTP client MUST be used.</dd>
+        <dt>boolean compactArrays = true</dt>
+        <dd>If set to <code>true</code>, the JSON-LD processor replaces arrays with just
+          one element with that element during compaction. If set to <code>false</code>,
+          all arrays will remain arrays even if they have just one element.
+        </dd>
         <dt>object or DOMString expandContext = null</dt>
         <dd>A context that is used to initialize the active context when expanding a document.</dd>
         <dt>boolean compactArrays = true</dt>