.setName(RSS_NAME)
.setProperties(properties);
registry.build(Feed.KEY, Feed.UPDATED, RSS)
.setName(LAST_BUILD_DATE)
.setVirtualValue(new VirtualValue() {
public Object generate(Element element,
ElementMetadata<?, ?> metadata) {
DateTime date = element.getTextValue(Feed.UPDATED);
return date == null ? "" : date.toStringRfc822();
}