gistfile1.js

YUI().use('gallery-markout', function(Y){
    var collection  = ['a', 'b', 'c'],
        list        = Y.Markout().ul({ id: 'my-list' });
    
    Y.each(collection, function(){
        list.li({ 'class': 'item'}, this);
    });
    
    list.node().appendTo('body');
});