--- a/structs.go	Sun Dec 25 19:02:53 2011 -0700
+++ b/structs.go	Mon Dec 26 11:48:35 2011 -0700
@@ -66,9 +66,23 @@
 }
 var _ xml.Marshaler = &errText{}
 
+type Features struct {
+	Starttls starttls
+	Mechanisms mechs
+}
+
+type starttls struct {
+	required *string
+}
+
+type mechs struct {
+	Mechanism []string
+}
+
 type Unrecognized struct {
 	XMLName xml.Name
 }
+var _ fmt.Stringer = &Unrecognized{}
 
 func (jid *JID) String() string {
 	result := jid.Domain
@@ -171,3 +185,8 @@
 		io.WriteString(w, `"`)
 	}
 }
+
+func (u *Unrecognized) String() string {
+	return fmt.Sprintf("unrecognized{%s %s}", u.XMLName.Space,
+		u.XMLName.Local)
+}