diff -r 7128fabeede0 -r 807f8543d10e src/FreeformASN1ContentHandler.h
--- a/src/FreeformASN1ContentHandler.h	Sun Jul 25 11:53:55 2021 +0200
+++ b/src/FreeformASN1ContentHandler.h	Sun Jul 25 12:09:30 2021 +0200
@@ -16,6 +16,8 @@
  */
 #pragma once
 
+#include <string>
+
 #include <relpipe/writer/RelationalWriter.h>
 #include "lib/ASN1ContentHandler.h"
 #include "Configuration.h"
@@ -50,10 +52,27 @@
 		relpipe::common::type::Integer parent = r.position[r.position.size() - 2];
 		relpipe::common::type::Integer level = r.position.size() - 2;
 
+		relpipe::common::type::StringX pc;
+		relpipe::common::type::StringX tagClass;
+
+		if (r.header) {
+			if (r.header->pc == PC::Primitive) pc = L"primitive";
+			else if (r.header->pc == PC::Constructed) pc = L"primitive";
+			else throw std::logic_error("Unexpected PC: " + std::to_string((uint8_t) r.header->pc)); // should never happen
+
+			if (r.header->tagClass == TagClass::Universal) tagClass = L"universal";
+			else if (r.header->tagClass == TagClass::ContextSpecific) tagClass = L"context";
+			else if (r.header->tagClass == TagClass::Application) tagClass = L"application";
+			else if (r.header->tagClass == TagClass::Private) tagClass = L"private";
+			else throw std::logic_error("Unexpected TagClass: " + std::to_string((uint8_t) r.header->tagClass)); // should never happen
+		}
+
 		writer->writeAttribute(&id, typeid (id));
 		writer->writeAttribute(&parent, typeid (parent));
 		writer->writeAttribute(&level, typeid (level));
 		writer->writeAttribute(&r.event, typeid (r.event));
+		// writer->writeAttribute(&pc, typeid (pc));
+		writer->writeAttribute(&tagClass, typeid (tagClass));
 		writer->writeAttribute(&tag, typeid (tag));
 	}
 
@@ -72,8 +91,8 @@
 			{L"parent", relpipe::writer::TypeId::INTEGER},
 			{L"level", relpipe::writer::TypeId::INTEGER},
 			{L"event", relpipe::writer::TypeId::STRING},
-			//{L"pc", relpipe::writer::TypeId::STRING},
-			//{L"tag_class", relpipe::writer::TypeId::STRING},
+			// {L"pc", relpipe::writer::TypeId::STRING},
+			{L"tag_class", relpipe::writer::TypeId::STRING},
 			{L"tag", relpipe::writer::TypeId::INTEGER},
 		}, true);