What is xhtml strict?

Related questions

1. Why is xhtml needed?
2. What is difference between html and xhtml?
3. What is the primary function of xhtml?
4. Which is the latest HTML version?
5. What is xhtml in computer?
6. What is the full meaning of xhtml?
7. Is html5 a xhtml?
8. Is xhtml still used 2018?
9. Should I use html5 or xhtml?
10. What is the difference between XML and xhtml?

Tags

1. #consortium
2. #xhtml
3. #world
4. #elements
5. #homepage
6. #specification
7. #document
8. #website
9. #attributes
10. #includes
11. #deprecated
12. #november
13. #equivalent
14. #strict
15. #marked