diff -r c043377a757f -r 82ba555a97d1 src/XmlHandler.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/XmlHandler.h	Sun Sep 16 14:39:10 2018 +0200
@@ -0,0 +1,86 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <iostream>
+#include <sstream>
+#include <locale>
+#include <codecvt>
+#include <regex>
+
+#include <relpipe/reader/typedefs.h>
+#include <relpipe/reader/TypeId.h>
+#include <relpipe/reader/handlers/RelationalReaderStringHandler.h>
+#include <relpipe/reader/handlers/AttributeMetadata.h>
+
+namespace relpipe {
+namespace out {
+namespace tabular {
+
+using namespace relpipe::reader;
+
+class XmlHandler : public handlers::RelationalReaderStringHadler {
+private:
+	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // XML output will be always in UTF-8
+	const char* INDENT = "\t";
+
+	std::ostream &output;
+
+	std::vector<TypeId> columnTypes;
+	std::vector<string_t> columnTypeCodes;
+	std::vector<string_t> columnNames;
+	std::vector<integer_t> columnWidths;
+	std::vector<string_t> values; // all values are saved here and processed at the end of the relation
+	integer_t columnCount = 0;
+
+	
+
+	const string_t escapeXmlText(const string_t &value, const char* color) {
+		std::wstringstream result;
+
+		for (auto & ch : value) {
+			switch (ch) {
+				// FIXME: xml escaping
+				case L'&': result << L"&amp;";
+					break;
+				default: result << ch;
+			}
+		}
+
+		return result.str();
+	}
+
+public:
+
+	XmlHandler(std::ostream& output) : output(output) {
+	}
+
+	void startRelation(string_t name, std::vector<handlers::AttributeMetadata> attributes) override {
+		output << convertor.to_bytes(name) << ": (XML)" << endl;
+		columnCount = attributes.size();
+		columnTypes.resize(columnCount);
+		columnTypeCodes.resize(columnCount);
+		columnNames.resize(columnCount);
+		columnWidths.resize(columnCount, 0);
+		for (int i = 0; i < attributes.size(); i++) {
+			columnNames[i] = attributes[i].getAttributeName();
+			columnTypes[i] = attributes[i].getTypeId();
+			columnTypeCodes[i] = attributes[i].getTypeName();
+		}
+	}
+
+	void attribute(const string_t& value) override {
+		integer_t i = values.size() % columnCount;
+		values.push_back(value);
+		columnWidths[i] = max(columnWidths[i], value.length());
+	}
+
+	void endOfPipe() {
+		
+	}
+
+};
+
+}
+}
+}