<course> <chapter url_name="Overview"> <videosequence url_name="Toy_Videos"> <html url_name="toylab"/> <video url_name="Video_Resources" youtube_id_1_0="1bK-WdDi6Qw"/> </videosequence> <video url_name="Welcome" youtube_id_1_0="p2Q6BrNhdh8"/> </chapter> <chapter url_name="Ch2"> <html url_name="test_html"> <h2>Welcome</h2> </html> </chapter> </course>