diff -r 6bdb45af26d9 -r b6ff5b7a8422 java/sql-dk/src/main/java/info/globalcode/sql/dk/formatting/XmlFormatter.java
--- a/java/sql-dk/src/main/java/info/globalcode/sql/dk/formatting/XmlFormatter.java	Mon Mar 04 22:28:29 2019 +0100
+++ b/java/sql-dk/src/main/java/info/globalcode/sql/dk/formatting/XmlFormatter.java	Tue Mar 05 21:22:33 2019 +0100
@@ -23,12 +23,14 @@
 import static info.globalcode.sql.dk.Functions.notNull;
 import info.globalcode.sql.dk.NamedParameter;
 import info.globalcode.sql.dk.configuration.PropertyDeclaration;
-import static info.globalcode.sql.dk.formatting.AbstractXmlFormatter.qname;
 import java.sql.Array;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.SQLXML;
+import java.sql.Types;
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -42,28 +44,73 @@
  * choice for further processing – e.g. XSL transformation.</p>
  *
  * <p>
- * TODO: XSD</p>
+ * XML format is defined in the <a href="https://relational-pipes.globalcode.info/">Relational
+ * pipes</a> specification.
+ * </p>
  *
  * @author Ing. František Kučera (frantovo.cz)
  */
 @PropertyDeclaration(name = XmlFormatter.PROPERTY_LABELED_COLUMNS, defaultValue = "false", type = Boolean.class, description = "whether to add 'label' attribute to each 'column' element")
 public class XmlFormatter extends AbstractXmlFormatter {
 
+	private static final String XML_ELEMENT_RELATION = "relation";
+	private static final String XML_ELEMENT_NAME = "name";
+	private static final String XML_ELEMENT_RECORD = "record";
+	private static final String XML_ELEMENT_ATTRIBUTE = "attribute";
+	private static final String XML_ATTRIBUTE_NAME = "name";
+	private static final String XML_ATTRIBUTE_TYPE = "type";
+	private static final String XML_ATTRIBUTE_STATEMENT = "statement";
+	private static final String XML_NS_PREFIX_SQLDK = "sql-dk";
+
+	private static final String RELPIPE_TYPE_BOOLEAN = "boolean";
+	private static final String RELPIPE_TYPE_INTEGER = "integer";
+	private static final String RELPIPE_TYPE_STRING = "string";
+	private static final Map<Integer, String> RELPIPE_TYPES;
+
+	static {
+		Map<Integer, String> m = new HashMap<>();
+		m.put(Types.BOOLEAN, RELPIPE_TYPE_BOOLEAN);
+		m.put(Types.BIT, RELPIPE_TYPE_BOOLEAN); // TODO: relpipe "boolean" can not be null in the current version
+		// m.put(Types.INTEGER, RELPIPE_TYPE_INTEGER); // relpipe "integer" is unsigned
+		// TODO: add more types when supported in Relational pipes
+		m.put(Types.CHAR, RELPIPE_TYPE_STRING);
+		m.put(Types.VARCHAR, RELPIPE_TYPE_STRING);
+		RELPIPE_TYPES = Collections.unmodifiableMap(m);
+	}
+
 	public static final String NAME = "xml"; // bash-completion:formatter
 	public static final String PROPERTY_LABELED_COLUMNS = "labeledColumns";
 	private static final Logger log = Logger.getLogger(XmlFormatter.class.getName());
 	private final boolean labeledColumns;
 
+	private String currentDatabaseName;
+	private int statementCounter;
+	private int resultSetCounter;
+
 	public XmlFormatter(FormatterContext formatterContext) {
 		super(formatterContext);
 		labeledColumns = formatterContext.getProperties().getBoolean(PROPERTY_LABELED_COLUMNS, false);
 	}
 
+	private QName qname(String localPart) {
+		return new QName(Xmlns.RELPIPE, localPart);
+	}
+
+	private QName qnameDK(String localPart) {
+		return new QName(Xmlns.SQLDK, localPart, XML_NS_PREFIX_SQLDK);
+	}
+
 	@Override
 	public void writeStartBatch() {
 		super.writeStartBatch();
 		printStartDocument();
-		printStartElement(qname("batchResult"), singleAttribute(qname("xmlns"), Xmlns.BATCH_RESULT));
+		Map<QName, String> attributes = new LinkedHashMap<>(2);
+		attributes.put(qname("xmlns"), Xmlns.RELPIPE);
+		attributes.put(new QName(null, XML_NS_PREFIX_SQLDK, "xmlns"), Xmlns.SQLDK);
+		printStartElement(qname("relpipe"), attributes);
+		statementCounter = 0;
+		resultSetCounter = 0;
+
 	}
 
 	@Override
@@ -76,64 +123,101 @@
 	@Override
 	public void writeStartDatabase(DatabaseDefinition databaseDefinition) {
 		super.writeStartDatabase(databaseDefinition);
+		currentDatabaseName = databaseDefinition.getName();
 		Map<QName, String> attributes = databaseDefinition.getName() == null ? null : singleAttribute(qname("name"), databaseDefinition.getName());
-		printStartElement(qname("database"), attributes);
+		printEmptyElement(qnameDK("database-start"), attributes);
 	}
 
 	@Override
 	public void writeEndDatabase() {
 		super.writeEndDatabase();
-		printEndElement();
+		Map<QName, String> attributes = currentDatabaseName == null ? null : singleAttribute(qname("name"), currentDatabaseName);
+		printEmptyElement(qnameDK("database-end"), attributes);
+	}
+
+	private String getCurrentStatementName() {
+		return "s" + statementCounter;
 	}
 
 	@Override
 	public void writeStartStatement() {
 		super.writeStartStatement();
-		printStartElement(qname("statement"));
+		statementCounter++;
+		printEmptyElement(qnameDK("statement-start"), singleAttribute(qname("id"), getCurrentStatementName()));
 	}
 
 	@Override
 	public void writeEndStatement() {
 		super.writeEndStatement();
-		printEndElement();
+		printEmptyElement(qnameDK("statement-end"), singleAttribute(qname("id"), getCurrentStatementName()));
 	}
 
 	@Override
 	public void writeQuery(String sql) {
 		super.writeQuery(sql);
-		printTextElement(qname("sql"), null, sql);
+		printTextElement(qnameDK("sql"), singleAttribute(qname(XML_ATTRIBUTE_STATEMENT), getCurrentStatementName()), sql);
 	}
 
 	@Override
 	public void writeParameters(List<? extends Parameter> parameters) {
 		super.writeParameters(parameters);
 
-		for (Parameter p : notNull(parameters)) {
+		if (parameters != null && parameters.size() > 0) {
 
-			Map<QName, String> attributes = new LinkedHashMap<>(2);
-			if (p instanceof NamedParameter) {
-				attributes.put(qname("name"), ((NamedParameter) p).getName());
+			printStartElement(qnameDK("parameters"), singleAttribute(qname(XML_ATTRIBUTE_STATEMENT), getCurrentStatementName()));
+
+			for (Parameter p : notNull(parameters)) {
+
+				Map<QName, String> attributes = new LinkedHashMap<>(2);
+				if (p instanceof NamedParameter) {
+					attributes.put(qname(XML_ATTRIBUTE_NAME), ((NamedParameter) p).getName());
+				}
+				attributes.put(qname(XML_ATTRIBUTE_TYPE), p.getType().name());
+
+				printTextElement(qnameDK("parameter"), attributes, String.valueOf(p.getValue()));
 			}
-			attributes.put(qname("type"), p.getType().name());
 
-			printTextElement(qname("parameter"), attributes, String.valueOf(p.getValue()));
+			printEndElement();
+
 		}
 
 	}
 
+	private String getCurrentRelationName() {
+		// TODO: support custom names (add CLI option)
+		return "r" + resultSetCounter;
+	}
+
 	@Override
 	public void writeStartResultSet(ColumnsHeader header) {
 		super.writeStartResultSet(header);
-		printStartElement(qname("resultSet"));
+		resultSetCounter++;
+		printStartElement(qname(XML_ELEMENT_RELATION), singleAttribute(qnameDK(XML_ATTRIBUTE_STATEMENT), getCurrentStatementName()));
+		printTextElement(qname(XML_ELEMENT_NAME), null, getCurrentRelationName());
 
+		printStartElement(qname("attributes-metadata"));
 		for (ColumnDescriptor cd : header.getColumnDescriptors()) {
-			Map<QName, String> attributes = new LinkedHashMap<>(4);
-			attributes.put(qname("label"), cd.getLabel());
-			attributes.put(qname("name"), cd.getName());
-			attributes.put(qname("typeName"), cd.getTypeName());
-			attributes.put(qname("type"), String.valueOf(cd.getType()));
-			printEmptyElement(qname("columnHeader"), attributes);
+			Map<QName, String> attributes = new LinkedHashMap<>(6);
+
+			attributes.put(qname(XML_ATTRIBUTE_NAME), cd.getLabel());
+			attributes.put(qname(XML_ATTRIBUTE_TYPE), toRelpipeType(cd.getType()));
+
+			attributes.put(qnameDK("tableName"), cd.getTableName());
+			attributes.put(qnameDK("columnName"), cd.getName());
+			attributes.put(qnameDK("jdbcTypeName"), cd.getTypeName());
+			attributes.put(qnameDK("jdbcType"), String.valueOf(cd.getType()));
+
+			printEmptyElement(qname("attribute-metadata"), attributes);
 		}
+		printEndElement();
+	}
+
+	/**
+	 * @param jdbcType value from {@linkplain Types}
+	 * @return
+	 */
+	private String toRelpipeType(int jdbcType) {
+		return RELPIPE_TYPES.getOrDefault(jdbcType, RELPIPE_TYPE_STRING);
 	}
 
 	@Override
@@ -145,7 +229,7 @@
 	@Override
 	public void writeStartRow() {
 		super.writeStartRow();
-		printStartElement(qname("row"));
+		printStartElement(qname(XML_ELEMENT_RECORD));
 	}
 
 	@Override
@@ -155,21 +239,23 @@
 		Map<QName, String> attributes = null;
 		if (labeledColumns) {
 			attributes = new LinkedHashMap<>(2);
-			attributes.put(qname("label"), getCurrentColumnsHeader().getColumnDescriptors().get(getCurrentColumnsCount() - 1).getLabel());
+			attributes.put(qname(XML_ATTRIBUTE_NAME), getCurrentColumnsHeader().getColumnDescriptors().get(getCurrentColumnsCount() - 1).getLabel());
+			attributes.put(qname(XML_ATTRIBUTE_TYPE), toRelpipeType(getCurrentColumnsHeader().getColumnDescriptors().get(getCurrentColumnsCount() - 1).getType()));
 		}
 
 		if (value == null) {
 			if (attributes == null) {
 				attributes = new LinkedHashMap<>(2);
 			}
-			attributes.put(qname("null"), "true");
-			printEmptyElement(qname("column"), attributes);
+			// TODO: synchronize syntax with Relational pipes (after adding support of null values)
+			attributes.put(qnameDK("null"), "true");
+			printEmptyElement(qname(XML_ELEMENT_ATTRIBUTE), attributes);
 		} else if (value instanceof Array) {
 
 			Array sqlArray = (Array) value;
 			try {
 				Object[] array = (Object[]) sqlArray.getArray();
-				printStartElement(qname("column"), attributes);
+				printStartElement(qname(XML_ELEMENT_ATTRIBUTE), attributes);
 				printArray(array);
 				printEndElement();
 			} catch (SQLException e) {
@@ -186,7 +272,7 @@
 						// }
 					}
 
-					printStartElement(qname("column"), attributes);
+					printStartElement(qname(XML_ELEMENT_ATTRIBUTE), attributes);
 					// FIXME: instanceof SQLXML, see below
 					printArray(arrayList.toArray());
 					printEndElement();
@@ -203,25 +289,26 @@
 			SQLXML xml = (SQLXML) value;
 			// TODO: parse DOM/SAX and transplant XML, don't escape (optional)
 			try {
-				printTextElement(qname("column"), attributes, xml.getString());
+				printTextElement(qname(XML_ELEMENT_ATTRIBUTE), attributes, xml.getString());
 			} catch (SQLException e) {
 				log.log(Level.SEVERE, "Unable to format XML", e);
 				writeColumnValue(String.valueOf(value));
 			}
 		} else {
-			printTextElement(qname("column"), attributes, toString(value));
+			printTextElement(qname(XML_ELEMENT_ATTRIBUTE), attributes, toString(value));
 		}
 	}
 
 	private void printArray(Object[] array) {
-		printStartElement(qname("array"));
+		// TODO: synchronize array syntax with Relational pipes
+		printStartElement(qnameDK("array"));
 		for (Object o : array) {
 			if (o instanceof Object[]) {
-				printStartElement(qname("item"));
+				printStartElement(qnameDK("item"));
 				printArray((Object[]) o);
 				printEndElement();
 			} else {
-				printTextElement(qname("item"), null, String.valueOf(o));
+				printTextElement(qnameDK("item"), null, String.valueOf(o));
 			}
 		}
 		printEndElement();
@@ -236,7 +323,7 @@
 	@Override
 	public void writeUpdatesResult(int updatedRowsCount) {
 		super.writeUpdatesResult(updatedRowsCount);
-		printTextElement(qname("updatedRows"), null, String.valueOf(updatedRowsCount));
+		printTextElement(qnameDK("updatedRecords"), singleAttribute(qnameDK(XML_ATTRIBUTE_STATEMENT), getCurrentStatementName()), String.valueOf(updatedRowsCount));
 	}
 
 	protected String toString(Object value) {