Can href be empty?

Related questions

1. How do you link a tag in HTML?
2. What is blank link?
3. Why do we use hyperlinks?
4. How do you use Alt tags in HTML?
5. What does the A tag stand for in HTML?
6. How do I open an HREF in a new window?
7. What is a tag in HTML?
8. How do you center text in HTML?
9. Is title an attribute of a tag?
10. What is anchor tag HTML?

Tags

1. #attribute
2. #value
3. #question
4. #specifications
5. #answers
6. #string
7. #however
8. #answered
9. #relevant
10. #although
11. #already
12. #existing
13. #reference
14. #empty
15. #references
16. #valid
17. #doesn