How do I create a doctype in HTML?

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Tags

1. #proper
2. #markup
3. #following
4. #using
5. #polyglot
6. #template
7. #pages
8. #another
9. #xhtml
10. #doctype
11. #below
12. #together
13. #document
14. #attribute
15. #create
16. #html5
17. #declaration
18. #served
19. #documents