github.com/MontFerret/ferret@v0.18.0/e2e/tests/static/doc/xpath/query.fql (about)

     1  LET url = @lab.cdn.static + '/value.html'
     2  LET page = DOCUMENT(url)
     3  
     4  LET actual = XPATH(page, "//tr[contains(@class, 'odd')]")
     5  
     6  RETURN T::LEN(actual, 20)