tree.addStartElement(XProcConstants.c_result);
tree.startContent();
try {
DataStore store = runtime.getDataStore();
URI uri = store.createList(href.getString(), href.getBaseURI().toASCIIString());
tree.addText(uri.toASCIIString());
} catch (FileNotFoundException e) {
throw new XProcException(step.getNode(), "Cannot mkdir: file exists: " + href.getString());
} catch (IOException e) {
throw new XProcException(step.getNode(), "Mkdir failed for: " + href.getString());