element.setAttribute("description", description);
element.setAttribute("is-substation", Boolean.toString(isSubstation));
element.setAttribute("is-import", Boolean.toString(isImport));
MonadDate fromDate = new MonadDate(validFrom);
fromDate.setLabel("from");
element.appendChild(fromDate.toXml(doc));
if (validTo != null) {
MonadDate toDate = new MonadDate(validTo);
toDate.setLabel("to");
element.appendChild(toDate.toXml(doc));
}