var dsStates = new Spry.Data.XMLDataSet("../_data/states.xml", "states/state");
var dsCities = new Spry.Data.XMLDataSet("../_data/{dsStates::url}", "state/cities/city", {sortOnLoad: "name", sortOrderOnLoad: "ascending"});
var dsInfo = new Spry.Data.XMLDataSet("../_data/{dsCities::url}", "city");