Pp. 149 (no. 171)

This code sample is adapted from Clifford B. Anderson and Joseph C. Wicentowski, XQuery for Humanists (College Station: Texas A&M University Press, 2020), 149. Download this code sample in its raw form. View the source on GitHub.

xquery version "3.1";

declare variable $eastern-countries := ["China", "Russia", "Japan"];
declare variable $western-countries := ["Mexico", "Canada", "United States"];
declare variable $countries := 
    map {
        "eastern-countries": $eastern-countries,
        "western-countries": $western-countries
    };

$countries?*[. = "China"]