Question: what are the different levels of professional hockey?
Answer: 1.1 Major professional.
1.2 Minor professional.
1.3 Semi-pro.
1.4 Junior. 1.4.1 Major junior. 1.4.2 Junior A. ... 
1.5 College. 1.5.1 U Sports hockey (Canada) 1.5.2 NCAA hockey (United States) ... 
1.6 Women's.
1.7 Senior. 1.7.1 Sanctioned by Hockey Canada or USA Hockey. 1.7.1.1 Canada. ... 
1.8 School and youth. 1.8.1 High school.