diff --git a/utils/yangutils/datamodel/src/main/java/org/onosproject/yangutils/datamodel/utils/DataModelUtils.java b/utils/yangutils/datamodel/src/main/java/org/onosproject/yangutils/datamodel/utils/DataModelUtils.java
new file mode 100644
index 0000000..f7ac5f2
--- /dev/null
+++ b/utils/yangutils/datamodel/src/main/java/org/onosproject/yangutils/datamodel/utils/DataModelUtils.java
@@ -0,0 +1,258 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.yangutils.datamodel.utils;
+
+import java.util.List;
+import java.util.Set;
+
+import org.onosproject.yangutils.datamodel.CollisionDetector;
+import org.onosproject.yangutils.datamodel.ResolvableType;
+import org.onosproject.yangutils.datamodel.YangLeaf;
+import org.onosproject.yangutils.datamodel.YangLeafList;
+import org.onosproject.yangutils.datamodel.YangLeavesHolder;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangReferenceResolver;
+import org.onosproject.yangutils.datamodel.YangResolutionInfo;
+import org.onosproject.yangutils.datamodel.YangRpc;
+import org.onosproject.yangutils.datamodel.YangType;
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+
+/**
+ * Represents utilities for data model tree.
+ */
+public final class DataModelUtils {
+
+    /**
+     * Creates a new data model tree utility.
+     */
+    private DataModelUtils() {
+    }
+
+    /**
+     * Detects the colliding identifier name in a given YANG node and its child.
+     *
+     * @param identifierName name for which collision detection is to be checked
+     * @param dataType       type of YANG node asking for detecting collision
+     * @param node           instance of calling node
+     * @throws DataModelException a violation of data model rules
+     */
+    public static void detectCollidingChildUtil(String identifierName, YangConstructType dataType, YangNode node)
+            throws DataModelException {
+        if (dataType == YangConstructType.USES_DATA || dataType == YangConstructType.GROUPING_DATA) {
+            detectCollidingForUsesGrouping(identifierName, dataType, node);
+        } else {
+            if (node instanceof YangLeavesHolder) {
+                YangLeavesHolder leavesHolder = (YangLeavesHolder) node;
+                detectCollidingLeaf(leavesHolder.getListOfLeaf(), identifierName);
+                detectCollidingLeafList(leavesHolder.getListOfLeafList(), identifierName);
+            }
+            node = node.getChild();
+            while (node != null) {
+                Parsable parsable = (Parsable) node;
+                if (node instanceof CollisionDetector
+                        && parsable.getYangConstructType() != YangConstructType.USES_DATA
+                        && parsable.getYangConstructType() != YangConstructType.GROUPING_DATA) {
+                    ((CollisionDetector) node).detectSelfCollision(identifierName, dataType);
+                }
+                node = node.getNextSibling();
+            }
+        }
+    }
+
+    /**
+     * Detects colliding of uses and grouping only with uses and grouping respectively.
+     *
+     * @param identifierName name for which collision detection is to be checked
+     * @param dataType       type of YANG node asking for detecting collision
+     * @param node           node instance of calling node
+     * @throws DataModelException a violation of data model rules
+     */
+    public static void detectCollidingForUsesGrouping(String identifierName, YangConstructType dataType, YangNode node)
+            throws DataModelException {
+
+        node = node.getChild();
+        while (node != null) {
+            Parsable parsable = (Parsable) node;
+            if (node instanceof CollisionDetector
+                    && parsable.getYangConstructType() == dataType) {
+                ((CollisionDetector) node).detectSelfCollision(identifierName, dataType);
+            }
+            node = node.getNextSibling();
+        }
+    }
+
+    /**
+     * Detects the colliding identifier name in a given leaf node.
+     *
+     * @param listOfLeaf     List of leaves to detect collision
+     * @param identifierName name for which collision detection is to be checked
+     * @throws DataModelException a violation of data model rules
+     */
+    private static void detectCollidingLeaf(List<YangLeaf> listOfLeaf, String identifierName)
+            throws DataModelException {
+
+        if (listOfLeaf == null) {
+            return;
+        }
+        for (YangLeaf leaf : listOfLeaf) {
+            if (leaf.getName().equals(identifierName)) {
+                throw new DataModelException("YANG file error: Duplicate input identifier detected, same as leaf \""
+                        + leaf.getName() + "\"");
+            }
+        }
+    }
+
+    /**
+     * Detects the colliding identifier name in a given leaf-list node.
+     *
+     * @param listOfLeafList list of leaf-lists to detect collision
+     * @param identifierName name for which collision detection is to be checked
+     * @throws DataModelException a violation of data model rules
+     */
+    private static void detectCollidingLeafList(List<YangLeafList> listOfLeafList, String identifierName)
+            throws DataModelException {
+
+        if (listOfLeafList == null) {
+            return;
+        }
+        for (YangLeafList leafList : listOfLeafList) {
+            if (leafList.getName().equals(identifierName)) {
+                throw new DataModelException("YANG file error: Duplicate input identifier detected, same as leaf " +
+                        "list \"" + leafList.getName() + "\"");
+            }
+        }
+    }
+
+    /**
+     * Add a resolution information.
+     *
+     * @param resolutionInfo information about the YANG construct which has to be resolved
+     * @throws DataModelException a violation of data model rules
+     */
+    public static void addResolutionInfo(YangResolutionInfo resolutionInfo)
+            throws DataModelException {
+
+        /* get the module node to add maintain the list of nested reference */
+        YangNode curNode = resolutionInfo.getEntityToResolveInfo()
+                .getHolderOfEntityToResolve();
+        while (!(curNode instanceof YangReferenceResolver)) {
+            curNode = curNode.getParent();
+            if (curNode == null) {
+                throw new DataModelException("Internal datamodel error: Datamodel tree is not correct");
+            }
+        }
+        YangReferenceResolver resolutionNode = (YangReferenceResolver) curNode;
+
+        if (resolutionInfo.getEntityToResolveInfo()
+                .getEntityToResolve() instanceof YangType) {
+            resolutionNode.addToResolutionList(resolutionInfo,
+                    ResolvableType.YANG_DERIVED_DATA_TYPE);
+        } else {
+            resolutionNode.addToResolutionList(resolutionInfo,
+                    ResolvableType.YANG_USES);
+        }
+
+    }
+
+    /**
+     * Resolve linking for a resolution list.
+     *
+     * @param resolutionList    resolution list for which linking to be done
+     * @param dataModelRootNode module/sub-module node
+     * @throws DataModelException a violation of data model rules
+     */
+    public static void resolveLinkingForResolutionList(List<YangResolutionInfo> resolutionList,
+            YangReferenceResolver dataModelRootNode)
+            throws DataModelException {
+
+        for (YangResolutionInfo resolutionInfo : resolutionList) {
+            resolutionInfo.resolveLinkingForResolutionInfo(dataModelRootNode);
+        }
+    }
+
+    /**
+     * Links type/uses referring to typedef/uses of inter YANG file.
+     *
+     * @param resolutionList    resolution list for which linking to be done
+     * @param dataModelRootNode module/sub-module node
+     * @throws DataModelException a violation of data model rules
+     */
+    public static void linkInterFileReferences(List<YangResolutionInfo> resolutionList,
+            YangReferenceResolver dataModelRootNode)
+            throws DataModelException {
+        /*
+         * Run through the resolution list, find type/uses referring to inter
+         * file typedef/grouping, ask for linking.
+         */
+        for (YangResolutionInfo resolutionInfo : resolutionList) {
+            resolutionInfo.linkInterFile(dataModelRootNode);
+        }
+    }
+
+    /**
+     * Checks if there is any rpc defined in the module or sub-module.
+     *
+     * @param rootNode root node of the data model
+     * @return status of rpc's existence
+     */
+    public static boolean isRpcChildNodePresent(YangNode rootNode) {
+        YangNode childNode = rootNode.getChild();
+        while (childNode != null) {
+            if (childNode instanceof YangRpc) {
+                return true;
+            }
+            childNode = childNode.getNextSibling();
+        }
+        return false;
+    }
+
+    /**
+     * Returns referred node in a given set.
+     *
+     * @param yangNodeSet YANG node set
+     * @param refNodeName name of the node which is referred
+     * @return referred node's reference
+     */
+    public static YangNode findReferredNode(Set<YangNode> yangNodeSet, String refNodeName) {
+        /*
+         * Run through the YANG files to see which YANG file matches the
+         * referred node name.
+         */
+        for (YangNode yangNode : yangNodeSet) {
+            if (yangNode.getName().equals(refNodeName)) {
+                return yangNode;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Returns the contained data model parent node.
+     *
+     * @param currentNode current node which parent contained node is required
+     * @return parent node in which the current node is an attribute
+     */
+    public static YangNode getParentNodeInGenCode(YangNode currentNode) {
+
+        /*
+         * TODO: recursive parent lookup to support choice/augment/uses. TODO:
+         * need to check if this needs to be updated for
+         * choice/case/augment/grouping
+         */
+        return currentNode.getParent();
+    }
+}