<?xml version="1.0"?> <bindings xmlns="http://www.mozilla.org/xbl" xmlns:html="http://www.w3.org/1999/xhtml"> <binding id="prepend"> <content> <span/> <children/> </content> </binding> <binding id="append"> <content> <children/> <span/> </content> </binding> <binding id="prepend-with-comment-fix" extends="#prepend"> <implementation> <constructor> var span = document.createComment("xbl generated comment to prevent bug #36"); this.insertBefore(span, this.firstChild); </constructor> </implementation> </binding> </bindings>