diff -r 18bb23fc811f -r 500ce0b934e7 src/QRCommand.h
--- a/src/QRCommand.h	Thu Apr 15 20:45:10 2021 +0200
+++ b/src/QRCommand.h	Fri Apr 16 23:18:03 2021 +0200
@@ -40,6 +40,7 @@
 
 	void process(Configuration& configuration, std::shared_ptr<writer::RelationalWriter> writer, std::function<void() > relationalWriterFlush) {
 
+		// TODO: require PNM input and get rid off the ImageMagick dependency?
 		Magick::Image magick("/dev/stdin");
 		int width = magick.columns();
 		int height = magick.rows();
@@ -51,7 +52,8 @@
 		zbar::Image image(width, height, "Y800", raw, width * height);
 		zbar::ImageScanner scanner;
 
-		writer->startRelation(L"qr",{
+		writer->startRelation(L"symbol",{
+			{L"id", relpipe::writer::TypeId::INTEGER},
 			{L"type", relpipe::writer::TypeId::STRING},
 			// {L"addon_name", relpipe::writer::TypeId::STRING},
 			{L"value", relpipe::writer::TypeId::STRING},
@@ -64,7 +66,9 @@
 
 		int n = scanner.scan(image);
 
-		for (zbar::Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol) {
+		relpipe::common::type::Integer id = 0;
+		for (zbar::Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol, id++) {
+			writer->writeAttribute(&id, typeid (id));
 			writer->writeAttribute(convertor.from_bytes(symbol->get_type_name()));
 			// writer->writeAttribute(convertor.from_bytes(symbol->get_addon_name()));
 			writer->writeAttribute(convertor.from_bytes(symbol->get_data()));
@@ -94,6 +98,28 @@
 			writer->writeAttribute(&height, typeid (height));
 		}
 
+		if (configuration.listPolygonPoints) {
+			relpipe::common::type::Integer id = 0;
+
+			writer->startRelation(L"polygon_point",{
+				{L"symbol", relpipe::writer::TypeId::INTEGER},
+				{L"point", relpipe::writer::TypeId::INTEGER},
+				{L"x", relpipe::writer::TypeId::INTEGER},
+				{L"y", relpipe::writer::TypeId::INTEGER},
+			}, true);
+
+			for (zbar::Image::SymbolIterator symbol = image.symbol_begin(); symbol != image.symbol_end(); ++symbol, id++) {
+				for (relpipe::common::type::Integer i = 0, locationSize = symbol->get_location_size(); i < locationSize; i++) {
+					relpipe::common::type::Integer x = symbol->get_location_x(i);
+					relpipe::common::type::Integer y = symbol->get_location_y(i);
+					writer->writeAttribute(&id, typeid (id));
+					writer->writeAttribute(&i, typeid (i));
+					writer->writeAttribute(&x, typeid (x));
+					writer->writeAttribute(&y, typeid (y));
+				}
+			}
+		}
+
 		image.set_data(nullptr, 0);
 	}
 };