diff -r 000000000000 -r 66a454290286 src/YAMLCommand.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/YAMLCommand.h	Tue Dec 01 23:30:00 2020 +0100
@@ -0,0 +1,46 @@
+/**
+ * Relational pipes
+ * Copyright © 2019 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, version 3 of the License.
+ *
+ * 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 <memory>
+#include <vector>
+
+#include <relpipe/writer/RelationalWriter.h>
+#include <relpipe/writer/typedefs.h>
+
+namespace relpipe {
+namespace in {
+namespace yaml {
+
+class YAMLCommand {
+private:
+	std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
+
+public:
+
+	void process(std::istream& input, std::shared_ptr<relpipe::writer::RelationalWriter> writer) {
+		std::vector<relpipe::writer::AttributeMetadata> attributesMetadata;
+		attributesMetadata.push_back(relpipe::writer::AttributeMetadata{L"todo", relpipe::writer::TypeId::STRING});
+		writer->startRelation(L"YAML", attributesMetadata, true);
+	}
+};
+
+}
+}
+}