- ('http://www.w3.org/ns/ttml', [
- 'http://www.w3.org/2004/11/ttaf1',
- 'http://www.w3.org/2006/04/ttaf1',
- 'http://www.w3.org/2006/10/ttaf1',
+ (b'http://www.w3.org/ns/ttml', [
+ b'http://www.w3.org/2004/11/ttaf1',
+ b'http://www.w3.org/2006/04/ttaf1',
+ b'http://www.w3.org/2006/10/ttaf1',