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diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/L0StringModifier.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/L0StringModifier.java
new file mode 100644
index 000000000..23c19b87d
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+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/modifiers/L0StringModifier.java
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+/*******************************************************************************
+ * Copyright (c) 2007, 2011 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.browsing.ui.model.modifiers;
+
+import org.simantics.browsing.ui.common.ErrorLogger;
+import org.simantics.browsing.ui.content.Labeler.Modifier;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.RequestProcessor;
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.primitiverequest.PossibleAdapter;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.adapter.StringModifier;
+import org.simantics.db.layer0.util.Layer0Utils;
+import org.simantics.db.request.Read;
+import org.simantics.layer0.Layer0;
+
+public class L0StringModifier implements Modifier {
+
+	private final RequestProcessor processor;
+	private final Resource         subject;
+	private final Resource         propertyRelation;
+	private final Resource         literal;
+
+	public L0StringModifier(RequestProcessor processor, Resource subject, Resource propertyRelation, Resource literal) {
+		this.processor = processor;
+		this.subject = subject;
+		this.propertyRelation = propertyRelation;
+		this.literal = literal;
+	}
+
+	@Override
+	public String getValue() {
+		try {
+			return processor.syncRequest(new PossibleAdapter<String>(literal, String.class));
+		} catch (DatabaseException e) {
+			ErrorLogger.defaultLogError(e);
+			return null;
+		}
+	}
+
+	@Override
+	public String isValid(final String label) {
+		try {
+			return processor.syncRequest(new Read<String>() {
+				@Override
+				public String perform(ReadGraph graph) throws DatabaseException {
+					StringModifier modifier = graph.adapt(literal, StringModifier.class);
+					return modifier.isValid(label);
+				}
+			});
+		} catch (DatabaseException e) {
+			ErrorLogger.defaultLogError(e);
+			return e.getMessage();
+		}
+	}
+
+	@Override
+	public void modify(final String label) {
+		try {
+			processor.syncRequest(new WriteRequest() {
+				@Override
+				public void perform(WriteGraph graph) throws DatabaseException {
+					Layer0Utils.addCommentMetadata(graph, "Modify string");
+            		graph.markUndoPoint();
+					Statement stm = graph.getPossibleStatement(subject, propertyRelation);
+					if (stm.isAsserted(subject)) {
+						Layer0 L0 = Layer0.getInstance(graph);
+						Resource newLiteral = graph.newResource();
+						for (Resource iof : graph.getObjects(literal, L0.InstanceOf))
+							graph.claim(newLiteral, L0.InstanceOf, null, iof);
+						graph.claim(subject, propertyRelation, newLiteral);
+						StringModifier modifier = graph.adapt(newLiteral, StringModifier.class);
+						modifier.modify(graph, label);
+					} else {
+						StringModifier modifier = graph.adapt(literal, StringModifier.class);
+						modifier.modify(graph, label);
+					}
+				}
+			});
+		} catch (DatabaseException e) {
+			ErrorLogger.defaultLogError(e);
+		}
+	}
+
+}