String base = href.getBaseURI().toASCIIString();
URI uri = href.getBaseURI().resolve(href.getString());
TreeWriter tree = new TreeWriter(runtime);
tree.startDocument(step.getNode().getBaseURI());
tree.addStartElement(XProcConstants.c_result);
tree.startContent();
tree.addText(uri.toASCIIString());
performDelete(href, base, recursive, fail_on_error);