What is wrong with this doctype declaration?

🎲 Try a Random Question  |  Total Questions in Quiz: 116  |  🧠 Study this quiz with Flashcards
This question is part of a full practice quiz:
XHTML Fundamentals Test — practice the complete quiz, review flashcards, or try a random question.


What is wrong with this doctype declaration? <!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd'/>