This code sample is adapted from Clifford B. Anderson and Joseph C. Wicentowski, XQuery for Humanists (College Station: Texas A&M University Press, 2020), 197. Download this code sample in its raw form. View the source on GitHub.

let $join-with-space := fn:string-join(?, ", ")
let $words := ("Mary", "Margaret", "Max")
return
    $join-with-space($words)