What is the doctype for an html5 document?

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Tags

1. #specifies
2. #definition
3. #render
4. #doctype
5. #refers
6. #browsers
7. #usage
8. #based
9. #require
10. #language
11. #rules
12. #content
13. #because
14. #html5
15. #therefore
16. #declaration
17. #reference
18. #markup
19. #correctly