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diff --git a/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/common/ProfileVariables.java b/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/common/ProfileVariables.java
new file mode 100644
index 000000000..11881e0dc
--- /dev/null
+++ b/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/common/ProfileVariables.java
@@ -0,0 +1,151 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 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.scenegraph.profile.common;
+
+import org.simantics.scenegraph.INode;
+import org.simantics.scenegraph.NodeException;
+import org.simantics.scenegraph.ParentNode;
+import org.simantics.scenegraph.g2d.G2DParentNode;
+import org.simantics.scenegraph.profile.EvaluationContext;
+import org.simantics.scenegraph.profile.Observer;
+import org.simantics.scenegraph.profile.Style;
+import org.simantics.scenegraph.utils.InitValueSupport;
+import org.simantics.scenegraph.utils.NodeUtil;
+
+/**
+ * Utilities for handling scene graph nodes in diagram profile styles.
+ * 
+ * @see Style
+ */
+public class ProfileVariables {
+
+    public static void init(INode node, Observer observer) {
+        if(node instanceof InitValueSupport) {
+            ((InitValueSupport)node).initValues();
+        }
+    }
+    
+    /**
+     * @param node
+     * @param id
+     * @return
+     */
+    @SuppressWarnings("unchecked")
+    public static <N extends INode> N browseChild(INode node, String id) {
+
+        // There was an empty string meaning that input should be returned
+        if (id.isEmpty())
+            return (N)node;
+
+        String[] parts = id.split("\\.");
+        for (String part : parts) {
+            if ("*".equals(part)) {
+                node = NodeUtil.getFirstChild(node);
+            } else {
+                node = NodeUtil.getChildById(node, part);
+            }
+            if (node == null)
+                return null;
+        }
+
+        return (N)node;
+
+    }
+
+    /*
+     * Sets named property for named node starting from top level. The path identifies a node from named child hierarchy (separated by '.').
+     */
+    public static void claimNodeProperty(INode node, String property, Object value, EvaluationContext evaluationContext) {
+        
+        if(node == null) {
+            evaluationContext.update();
+            return;
+        }
+        
+//        for(String property : concat.keySet()) {
+            //System.out.println("sync: "+property+" | "+concat.get(property));
+            // TODO: property names containing dots "." should be splitted and treated as hierarchical properties 
+            if(property.contains(".")) {
+                String t[] = property.split("\\.");
+                if(t.length == 2) { // FIXME: add support for deeper hierarchy
+                    String child_name = t[0];
+                    String property_name = t[1];
+                    if(node instanceof G2DParentNode) {
+                        INode child = NodeUtil.findChildById((G2DParentNode)node, child_name);
+                        if(child != null)
+                            NodeUtil.setPropertyIfSupported(property_name, value, child);
+                    }
+                }
+            } else {
+                NodeUtil.setPropertyIfSupported(property, value, node);
+            }
+//        }
+        
+    }
+
+    /*
+     * Ensures that the element contains a named child node in given path with
+     * given class. All nodes in the path are expected to exist.
+     */
+    public static <N extends INode> N claimChild(INode node, String path, String name, Class<N> clazz, Observer observer) {
+
+        INode child = browseChild(node, path);
+        if(child == null) {
+            observer.exception(new NullPointerException("Scenegraph child node was not found: " + path));
+            observer.update();
+            return null;
+        }
+
+        INode existing = NodeUtil.getChildById(child, name);
+        if (existing == null) {
+            if (child instanceof ParentNode<?>) {
+                existing = ((ParentNode<?>) child).addNode(name, clazz);
+            } else {
+                observer.exception(new NodeException("Cannot claim child node for non-parent-node " + child));
+                return null;
+            }
+        } else if (!clazz.isInstance(existing)) {
+            observer.exception(new ClassCastException("Class of existing child node (" + existing.getClass() + ") with path=" + path + " and name=" + name + " is invalid, requested " + clazz));
+            return null;
+        }
+        return clazz.cast(existing);
+    }
+
+    /**
+     * @param node
+     * @param path
+     * @param name
+     */
+    public static void denyChild(INode node, String path, String name) {
+        INode child = browseChild(node, path);
+        if (child == null)
+            return;
+
+        if (child instanceof ParentNode<?>) {
+            ((ParentNode<?>) child).removeNode(name);
+        }
+    }
+
+    public static void denyChild(INode node, String name) {
+    	denyChild(node, "", name);
+    }
+
+    public static void denyChildren(INode node, String prefix) {
+        if (node instanceof ParentNode<?>) {
+            ParentNode<?> parent = (ParentNode<?>) node;
+
+            for (String childId : NodeUtil.filterDirectChildIds(parent, prefix))
+                parent.removeNode(childId);
+        }
+    }
+
+}