diff -r 000000000000 -r 751260846c40 src/XMLCommand.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/XMLCommand.h	Thu Jan 10 19:50:21 2019 +0100
@@ -0,0 +1,56 @@
+/**
+ * Relational pipes
+ * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <cstdlib>
+#include <iostream>
+#include <string>
+#include <vector>
+#include <algorithm>
+
+#include <relpipe/writer/typedefs.h>
+
+namespace relpipe {
+namespace in {
+namespace xml {
+
+class XMLCommand {
+public:
+
+	void process(std::istream& input, std::ostream& output) {
+		using namespace relpipe::writer;
+		std::shared_ptr<RelationalWriter> writer(Factory::create(output));
+
+		// TODO: remove demo
+		// Various data types passed as strings
+		writer->startRelation(L"xml",{
+			{L"s", TypeId::STRING},
+			{L"i", TypeId::INTEGER},
+			{L"b", TypeId::BOOLEAN}
+		}, true);
+
+		writer->writeAttribute(L"a");
+		writer->writeAttribute(L"1");
+		writer->writeAttribute(L"true");
+		
+	}
+};
+
+}
+}
+}