import com.google.common.base.Charsets;
import com.google.common.base.Optional;
+
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
+
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.validation.SchemaFactory;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
+
+import org.opendaylight.controller.netconf.api.xml.XmlNetconfConstants;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;