if (nextHnProp == null) {
// convert to slide namespace if this property is still
// in DAV: namespace
nextHnProp = hpathNrd.getProperty(I_NEXT_HISTORY_NAME);
if (nextHnProp != null) {
hpathNrd.removeProperty(nextHnProp);
nextHnProp = new NodeProperty(I_NEXT_HISTORY_NAME, nextHnProp.getValue(),
NamespaceCache.SLIDE_URI);
nextHnProp.setKind(NodeProperty.Kind.PROTECTED);
hpathNrd.setProperty(nextHnProp);
}