diff --git a/libs/main/serialization/piserializationmodule.h b/libs/main/serialization/piserializationmodule.h
index 4f5b970a..aa444483 100644
--- a/libs/main/serialization/piserializationmodule.h
+++ b/libs/main/serialization/piserializationmodule.h
@@ -54,5 +54,6 @@
 #include "pibinarystream.h"
 #include "pichunkstream.h"
 #include "pijson.h"
+#include "pivaluetree_conversions.h"
 
 #endif // PISERIALIZATIONMODULE_H
diff --git a/libs/main/serialization/pivaluetree_conversions.cpp b/libs/main/serialization/pivaluetree_conversions.cpp
new file mode 100644
index 00000000..c5c411b1
--- /dev/null
+++ b/libs/main/serialization/pivaluetree_conversions.cpp
@@ -0,0 +1,120 @@
+/*
+	PIP - Platform Independent Primitives
+	PIValueTree conversions
+	Ivan Pelipenko peri4ko@yandex.ru
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	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 Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "pivaluetree_conversions.h"
+#include "pipropertystorage.h"
+#include "pijson.h"
+#include "piiostring.h"
+
+
+PIValueTree PIValueTreeConversions::fromPropertyStorage(const PIPropertyStorage & ps) {
+	PIValueTree ret;
+	for (const auto & i: ps) {
+		PIValueTree v;
+		v.setName(i.name);
+		v.setValue(i.value);
+		v.setComment(i.comment);
+		ret.addChild(v);
+	}
+	return ret;
+}
+
+
+PIValueTree fromJSONTree(const PIJSON & json) {
+	PIValueTree ret;
+	ret.setName(json["name"].toString());
+	ret.setComment(json["comment"].toString());
+	PIString value_str = json["value"].toString();
+	PIVariant value = PIVariant::fromType(json["type"].toString());
+	if (value_str.isNotEmpty()) {
+		if (value.isValid())
+			value.setValueFromString(value_str);
+		else
+			value = value_str;
+	}
+	ret.setValue(value);
+	const PIJSON & attr(json["attributes"]);
+	for (const auto & i: attr.object())
+		ret.attributes()[i.first] = i.second.value();
+	bool is_array = ret.isArray();
+	int chindex = 0;
+	const PIJSON & chl(json["children"]);
+	for (const auto & i: chl.array()) {
+		PIValueTree c = fromJSONTree(i);
+		if (is_array) c.setName(PIString::fromNumber(chindex++));
+		ret.addChild(c);
+	}
+	return ret;
+}
+
+
+PIValueTree PIValueTreeConversions::fromJSON(const PIJSON & json) {
+	PIValueTree ret;
+	if (json.isObject()) ret = fromJSONTree(json);
+	if (json.isArray()) {
+		for (const auto & i: json.array())
+			ret.addChild(fromJSONTree(i));
+	}
+	return ret;
+}
+
+
+PIValueTree PIValueTreeConversions::fromText(PIIODevice * device) {
+	PIValueTree ret;
+	return ret;
+}
+
+
+PIJSON toJSONTree(const PIValueTree & root) {
+	PIJSON ret = PIJSON::newObject();
+	if (root.name().isNotEmpty())
+		ret["name"] = root.name();
+	if (root.comment().isNotEmpty())
+		ret["comment"] = root.comment();
+	if (root.value().isValid()) {
+		ret["type"] = root.value().typeName();
+		ret["value"] = root.value().toString();
+	}
+	if (root.attributes().isNotEmpty()) {
+		PIJSON j;
+		for (const auto & a: root.attributes())
+			j[a.first] = a.second.toString();
+		ret["attributes"] = j;
+	}
+	if (root.hasChildren()) {
+		PIJSON j;
+		for (const auto & c: root.children())
+			j << toJSONTree(c);
+		ret["children"] = j;
+	}
+	return ret;
+}
+
+
+PIJSON PIValueTreeConversions::toJSON(const PIValueTree & root) {
+	PIJSON ret = PIJSON::newArray();
+	for (const auto & c: root.children())
+		ret << toJSONTree(c);
+	return ret;
+}
+
+
+PIString PIValueTreeConversions::toText(const PIValueTree & root) {
+	PIString ret;
+	return ret;
+}
diff --git a/libs/main/serialization/pivaluetree_conversions.h b/libs/main/serialization/pivaluetree_conversions.h
new file mode 100644
index 00000000..826a71a2
--- /dev/null
+++ b/libs/main/serialization/pivaluetree_conversions.h
@@ -0,0 +1,43 @@
+/*! \file pivaluetree_conversions.h
+ * \ingroup Serialization
+ * \brief
+ * \~english PIValueTree conversions
+ * \~russian Преобразования PIValueTree
+*/
+/*
+	PIP - Platform Independent Primitives
+	PIValueTree conversions
+	Ivan Pelipenko peri4ko@yandex.ru
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	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 Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef pivaluetree_conversions_H
+#define pivaluetree_conversions_H
+
+#include "pivaluetree.h"
+
+class PIPropertyStorage;
+class PIJSON;
+class PIIODevice;
+
+namespace PIValueTreeConversions {
+	PIP_EXPORT PIValueTree fromPropertyStorage(const PIPropertyStorage & ps);
+	PIP_EXPORT PIValueTree fromJSON(const PIJSON & json);
+	PIP_EXPORT PIValueTree fromText(PIIODevice * device);
+	PIP_EXPORT PIJSON toJSON(const PIValueTree & root);
+	PIP_EXPORT PIString toText(const PIValueTree & root);
+}
+
+#endif
diff --git a/libs/main/types/pivaluetree.h b/libs/main/types/pivaluetree.h
index 3cb1402c..c30c9fd3 100644
--- a/libs/main/types/pivaluetree.h
+++ b/libs/main/types/pivaluetree.h
@@ -109,8 +109,7 @@ BINARY_STREAM_WRITE(PIValueTree) {
 	  .add(2, v._comment)
 	  .add(3, v._attributes)
 	  .add(4, v._value)
-	  .add(5, v._name)
-	  .add(6, v._children);
+	  .add(5, v._children);
 	s << cs.data();
 	return s;
 }
@@ -127,8 +126,7 @@ BINARY_STREAM_READ (PIValueTree) {
 		case 2: cs.get(v._comment);
 		case 3: cs.get(v._attributes);
 		case 4: cs.get(v._value);
-		case 5: cs.get(v._name);
-		case 6: cs.get(v._children);
+		case 5: cs.get(v._children);
 		}
 	}
 	return s;
diff --git a/libs/main/types/pivariant.cpp b/libs/main/types/pivariant.cpp
index dc58a4fb..2210961f 100644
--- a/libs/main/types/pivariant.cpp
+++ b/libs/main/types/pivariant.cpp
@@ -172,7 +172,7 @@ PIVariant::Type PIVariant::typeFromName(const PIString & tname) {
 	if (s == "pibitarray" || s == "bitarray") return PIVariant::pivBitArray;
 	if (s == "pibytearray" || s == "bytearray" || s == "vector<uchar>" || s == "pivector<uchar>" || s == "vector<unsignedchar>" || s == "pivector<unsignedchar>" ||
 		s == "vector<char>" || s == "pivector<char>") return PIVariant::pivByteArray;
-	if (s == "pistring" || s == "string") return PIVariant::pivString;
+	if (s == "pistring" || s == "string" || s == "text") return PIVariant::pivString;
 	if (s == "pistringlist" || s == "stringlist" || s == "vector<string>" || s == "vector<pistring>" || s == "pivector<string>" || s == "pivector<pistring>") return PIVariant::pivStringList;
 	if (s == "pitime" || s == "time") return PIVariant::pivTime;
 	if (s == "pidate" || s == "date") return PIVariant::pivDate;
@@ -221,12 +221,12 @@ PIVariant::Type PIVariant::typeFromID(uint type_id) {
 	if (type_id == typeID<PIVariantTypes::File>()) return PIVariant::pivFile;
 	if (type_id == typeID<PIVariantTypes::Dir>()) return PIVariant::pivDir;
 	if (type_id == typeID<PIVariantTypes::Color>()) return PIVariant::pivColor;
+	if (type_id == typeID<PIVariantTypes::IODevice>()) return PIVariant::pivIODevice;
 	if (type_id == typeID<PIPointd>()) return PIVariant::pivPoint;
 	if (type_id == typeID<PIRectd>()) return PIVariant::pivRect;
 	if (type_id == typeID<PIMathVectord>()) return PIVariant::pivMathVector;
 	if (type_id == typeID<PIMathMatrixd>()) return PIVariant::pivMathMatrix;
 	if (type_id == typeID<PILined>()) return PIVariant::pivLine;
-	if (type_id == typeID<PIVariantTypes::IODevice>()) return PIVariant::pivIODevice;
 #ifdef CUSTOM_PIVARIANT
 	if (__PIVariantInfoStorage__::get()->map->contains(type_id))
 		return PIVariant::pivCustom;
@@ -271,12 +271,12 @@ uint PIVariant::typeIDFromType(Type type) {
 	case (PIVariant::pivFile      ): return typeID<PIVariantTypes::File     >();
 	case (PIVariant::pivDir       ): return typeID<PIVariantTypes::Dir      >();
 	case (PIVariant::pivColor     ): return typeID<PIVariantTypes::Color    >();
+	case (PIVariant::pivIODevice  ): return typeID<PIVariantTypes::IODevice >();
 	case (PIVariant::pivPoint     ): return typeID<PIPointd                 >();
 	case (PIVariant::pivRect      ): return typeID<PIRectd                  >();
 	case (PIVariant::pivMathVector): return typeID<PIMathVectord            >();
 	case (PIVariant::pivMathMatrix): return typeID<PIMathMatrixd            >();
 	case (PIVariant::pivLine      ): return typeID<PILined                  >();
-	case (PIVariant::pivIODevice  ): return typeID<PIVariantTypes::IODevice >();
 	default: break;
 	}
 	return 0;
@@ -385,11 +385,11 @@ PIString PIVariant::typeName(PIVariant::Type type) {
 	case PIVariant::pivFile: return "File";
 	case PIVariant::pivDir: return "Dir";
 	case PIVariant::pivColor: return "Color";
+	case PIVariant::pivIODevice: return "IODevice";
 	case PIVariant::pivPoint: return "Point";
 	case PIVariant::pivRect: return "Rect";
 	case PIVariant::pivMathVector: return "Vector";
 	case PIVariant::pivMathMatrix: return "Matrix";
-	case PIVariant::pivIODevice: return "IODevice";
 	case PIVariant::pivCustom: return "Custom";
 	default: break;
 	}