Could anybody help me to learn how to exclude certain pages from my sitemap (for example, all specials on my website I would like to remove from sitemap). Thank you in advance. Here is my code:

@inherits Umbraco.Web.Macros.PartialViewMacroPage

@{
var rootNode = CurrentPage.AncestorOrself(1); }

@helper Traverse(IPublishedContent node){

var maxLevelForSitemap = 3;

var items = node.Children
    .Where("Visible")
    .Where("umbracoNaviHide != true")
    .Where("externalRedirect == \"\"")
    .Where("Level <= " + maxLevelForSitemap);

if (items.Count() > 0)
{
   <ul>
        @foreach (var item in items) {
            <li class="[email protected]">
                <a href="@item.Url">@item.Name</a>
                    @Traverse(item)
                </li>
            }
   </ul>
}

}