Is there a known trivia behind the wording used for XML declaration for XUL documents

Why does it say /keymaster/gatekeeper/开发者_开发技巧there.is.only.xul? Who picked this strange wording and why?

P.S. Some good tags for the question?

Xul is a character from the first Ghostbusters film, and it does utter the phrase "There Is Only Zuul" (Zuul sounds like Xul). The keymaster and gatekeeper are other characters from the same film.

Even wikipedia knows this.

If there's something strange
In your source code
Where you gonna post?

Stack Overflow!

If there's something weird
With that DOM node
Who you gonna call?

Stack Overflow!

We ain't afraid of no bug ...