What is doctype XML?

Related questions

1. Where is my website HTML?
2. How can we create doctype in html5?
3. Is HTML 5 case sensitive?
4. What is doctype >? Is it necessary to use in html5?
5. Why doctype is used in XML?
6. What is doctype is it necessary to use in html5?
7. What is doctype declaration in html5?
8. What does doctype mean?
9. Is doctype case sensitive?
10. What is doctype html?

Tags

1. #document
2. #internal
3. #keyword
4. #doctype
5. #declaration
6. #structure
7. #constraints
8. #combination
9. #upper
10. #references
11. #consists
12. #external
13. #defines
14. #definition