EmotionML namespace prefix

Hello,

I note an inconsistence using namespace prefixes in examples of
EmotionML. In example of section 2.1.1 (<emotionml>) there is em: as
prefix for EmotionML. In the example in section 5.2.2 (SSML) and in
Appendix A (XML Schema) emo: is used as prefix. What is the recommended
prefix? I think emo: is the most intuitive choise.

Best regards

Gerhard Fobe