Index: source
===================================================================
--- source	(revision 3106)
+++ source	(revision 3107)
@@ -49653,6 +49653,40 @@
   iterate over a series of elements (whether items, properties, or
   otherwise) must do so in <span>tree order</span>.</p>
 
+  <p>A generic API upon which the vocaulary-specific conversions
+  defined below (vCard, iCalendar, BibTeX) can be built will need to
+  provide the following information when given a <code>Document</code>
+  (or equivalent):</p>
+
+  <ul>
+
+   <li><span>The document's current address</span>.</li>
+
+   <li>The <code>textContent</code> of <span>the <code>title</code>
+   element</span>, if any.</li>
+
+   <li>The list of <span>top-level microdata items</span>.</li>
+
+   <li>For each <span title="concept-item">item</span>, the list of
+   properties that have that <span title="concept-item">item</span> as
+   their <span title="concept-item-corresponding">corresponding
+   item</span>.</li>
+
+   <li>For each property, its <span title="property
+   names">name</span>.</li>
+
+   <li>For each property, its <span
+   title="concept-property-value">value</span> (which might be a
+   further <span title="concept-item">item</span>).</li>
+
+   <li>For each property, if its <span
+   title="concept-property-value">value</span> is not itself an <span
+   title="concept-item">item</span>, whether the element is a
+   <code>time</code> element, a <span title="URL property
+   elements">URL property element</span>, or another element.</li>
+
+  </ul>
+
 
   <h4>JSON</h4>