XQuery looking for text with 'single' quote

Question

I can\'t figure out how to search for text containing single quotes using XPATHs.

For example, I\'ve added a quote to the title of this question. The following line<

Answer 1

In XPath 2.0 and XQuery 1.0, the delimiter of a string literal can be included in the string literal by doubling it:

let $a := "He said ""I won't"""

or

let $a := 'He said "I can''t"'

The convention is borrowed from SQL.