diff --git a/alib2str/src/alphabet/string/InitialSymbol.cpp b/alib2str/src/alphabet/string/InitialSymbol.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..14e3be307ecc373cc97ddff89e4a09d48e0f1fbd
--- /dev/null
+++ b/alib2str/src/alphabet/string/InitialSymbol.cpp
@@ -0,0 +1,36 @@
+/*
+ * InitialSymbol.cpp
+ *
+ * Created on: Nov 21, 2017
+ * Author: Tomas Pecka
+ */
+
+#include "InitialSymbol.h"
+#include <alphabet/InitialSymbol.h>
+#include <alphabet/Symbol.h>
+#include <object/Object.h>
+
+#include <registration/StringRegistration.hpp>
+
+namespace alib {
+
+alphabet::InitialSymbol stringApi < alphabet::InitialSymbol >::parse ( std::istream & ) {
+	throw exception::CommonException ( "parsing InitialSymbol from string not implemented" );
+}
+
+bool stringApi < alphabet::InitialSymbol >::first ( std::istream & ) {
+	return false;
+}
+
+void stringApi < alphabet::InitialSymbol >::compose ( std::ostream & output, const alphabet::InitialSymbol & ) {
+	output << "#I";
+}
+
+} /* namespace alib */
+
+namespace {
+
+static auto stringWrite = registration::StringWriterRegister < alphabet::Symbol, alphabet::InitialSymbol > ( );
+static auto stringWrite2 = registration::StringWriterRegister < alib::Object, alphabet::InitialSymbol > ( );
+
+} /* namespace */
diff --git a/alib2str/src/alphabet/string/InitialSymbol.h b/alib2str/src/alphabet/string/InitialSymbol.h
new file mode 100644
index 0000000000000000000000000000000000000000..504441ad428a9d1b74f7683b48f107bc231c87f3
--- /dev/null
+++ b/alib2str/src/alphabet/string/InitialSymbol.h
@@ -0,0 +1,25 @@
+/*
+ * InitialSymbol.h
+ *
+ * Created on: Nov 21, 2017
+ * Author: Tomas Pecka
+ */
+
+#ifndef _STRING_INITIAL_SYMBOL_H_
+#define _STRING_INITIAL_SYMBOL_H_
+
+#include <alphabet/InitialSymbol.h>
+#include <core/stringApi.hpp>
+
+namespace alib {
+
+template < >
+struct stringApi < alphabet::InitialSymbol > {
+	static alphabet::InitialSymbol parse ( std::istream & input );
+	static bool first ( std::istream & input );
+	static void compose ( std::ostream & output, const alphabet::InitialSymbol & symbol );
+};
+
+} /* namespace alib */
+
+#endif /* _STRING_INITIAL_SYMBOL_H_ */