diff -r 45c06bdf9045 -r 90f2b8ca32bf src/XMLDocumentConstructor.h
--- a/src/XMLDocumentConstructor.h	Sun Nov 22 19:25:42 2020 +0100
+++ b/src/XMLDocumentConstructor.h	Mon Nov 23 16:25:39 2020 +0100
@@ -67,15 +67,33 @@
 		entry->set_attribute("key", event.key);
 		entry->set_attribute("full-key", event.fullKey);
 		if (event.subKey.size()) entry->set_attribute("sub-key", event.subKey);
-		if (event.comment.size()) currentSection->set_attribute("comment", event.comment);
-		if (event.lineNumber >= 0) currentSection->set_attribute("line-number", std::to_string(event.lineNumber));
-		if (event.eventNumber >= 0) currentSection->set_attribute("event-number", std::to_string(event.eventNumber));
+		if (event.comment.size()) entry->set_attribute("comment", event.comment);
+		if (event.lineNumber >= 0) entry->set_attribute("line-number", std::to_string(event.lineNumber));
+		if (event.eventNumber >= 0) entry->set_attribute("event-number", std::to_string(event.eventNumber));
 		entry->add_child_text(event.value);
 	};
 
+	void comment(const CommentEvent& event) override {
+		xmlpp::Element* comment = currentSection->add_child("comment");
+		comment->set_attribute("type", "comment");
+		if (event.lineNumber >= 0) comment->set_attribute("line-number", std::to_string(event.lineNumber));
+		if (event.eventNumber >= 0) comment->set_attribute("event-number", std::to_string(event.eventNumber));
+		comment->add_child_text(event.comment);
+	}
+
+	void whitespace(const WhitespaceEvent& event) override {
+		xmlpp::Element* comment = currentSection->add_child("whitespace");
+		comment->set_attribute("type", "whitespace");
+		if (event.lineNumber >= 0) comment->set_attribute("line-number", std::to_string(event.lineNumber));
+		if (event.eventNumber >= 0) comment->set_attribute("event-number", std::to_string(event.eventNumber));
+		comment->add_child_text(event.whitespace);
+	}
+
 };
 
 // TODO: support also other styles/mappings e.g. <section/> and <entry/> with INI names only in the XML attributes (and thus without @type="section|entry")
+// or map INI comments and whitespace to native XML comments and text nodes (but there will be no metadata like line/event numbers)
+// TODO: optional namespaces (xmlns)
 
 class XMLDocumentConstructor {
 private: