diff -r 000000000000 -r e214f04abb98 htmlpage/src/main/java/org/apidesign/bck2brwsr/htmlpage/ProcessPage.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/htmlpage/src/main/java/org/apidesign/bck2brwsr/htmlpage/ProcessPage.java	Mon Sep 24 12:39:21 2012 +0200
@@ -0,0 +1,61 @@
+package org.apidesign.bck2brwsr.htmlpage;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+class ProcessPage {
+    private final Map<String,String> ids2Elems = new TreeMap<String, String>();
+    
+    public Set<String> ids() {
+        return Collections.unmodifiableSet(ids2Elems.keySet());
+    }
+    
+    public String tagNameForId(String id) {
+        return ids2Elems.get(id);
+    }
+    
+    public static ProcessPage readPage(InputStream is) throws IOException {
+        DocumentBuilderFactory f = DocumentBuilderFactory.newInstance();
+        f.setValidating(false);
+        f.setIgnoringComments(true);
+        
+        Document doc = null;
+        try {
+            DocumentBuilder b = f.newDocumentBuilder();
+            doc = b.parse(is);
+        } catch (IOException ex) {
+            throw ex;
+        } catch (Exception e) {
+            throw new IOException(e);
+        }
+        Element root = doc.getDocumentElement();
+        
+        ProcessPage pp = new ProcessPage();
+        pp.seekForIds(root);
+        return pp;
+    }
+
+    private void seekForIds(Element e) {
+        String val = e.getAttribute("id");
+        if (val != null && !val.isEmpty()) {
+            String prev = ids2Elems.put(val, e.getTagName());
+        }
+        NodeList arr = e.getChildNodes();
+        for (int i = 0; i < arr.getLength(); i++) {
+            final Node n = arr.item(i);
+            if (n instanceof Element) {
+                seekForIds((Element)n);
+            }
+        }
+    }
+}