diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/linker/IntraFileTypeLinkingTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/linker/IntraFileTypeLinkingTest.java
new file mode 100644
index 0000000..67fcf07
--- /dev/null
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/linker/IntraFileTypeLinkingTest.java
@@ -0,0 +1,420 @@
+/*
+ * Copyright 2016 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.linker;
+
+import java.io.IOException;
+import java.util.ListIterator;
+import org.junit.Test;
+import org.onosproject.yangutils.datamodel.ResolvableStatus;
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangDataTypes;
+import org.onosproject.yangutils.datamodel.YangDerivedInfo;
+import org.onosproject.yangutils.datamodel.YangLeaf;
+import org.onosproject.yangutils.datamodel.YangList;
+import org.onosproject.yangutils.datamodel.YangModule;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNodeType;
+import org.onosproject.yangutils.datamodel.YangTypeDef;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.Is.is;
+
+/**
+ * Test cases for testing "type" intra file linking.
+ */
+public class IntraFileTypeLinkingTest {
+
+    private final YangUtilsParserManager manager = new YangUtilsParserManager();
+
+    /**
+     * Checks self resolution when typedef and leaf using type are siblings.
+     */
+    @Test
+    public void processSelfResolutionWhenTypeAndTypedefAtRootLevel() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SelfResolutionWhenTypeAndTypedefAtRootLevel.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("hello"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild()));
+
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when typedef and leaf using type are at different
+     * level where typedef is at the root.
+     */
+    @Test
+    public void processSelfFileLinkingTypedefAtRootTypeTwoLevelInHierarchy() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingTypedefAtRootTypeTwoLevelInHierarchy.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild().getNextSibling();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("hello"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild()));
+
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when typedef and leaf using type are at different
+     * level where typedef is at the root and defined after parent holder
+     * of type.
+     */
+    @Test
+    public void processSelfFileLinkingTypedefAtRootIsAfterContainerHavingType() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingTypedefAtRootIsAfterContainerHavingType.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("hello"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild().getNextSibling()));
+
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when typedef and leaf using type are at different
+     * level where typedef is at the level of root+1 and defined after parent
+     * holder of type.
+     */
+    @Test
+    public void processSelfFileLinkingTypedefAtMiddleLevelAfterParentHolder() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingTypedefAtMiddleLevelAfterParentHolder.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("hello"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangContainer.getChild().getNextSibling()));
+
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when typedef hierarchical references are present.
+     */
+    @Test
+    public void processSelfFileLinkingWithTypdefHierarchicalReference() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingWithTypdefHierarchicalReference.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild().getNextSibling();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("FirstClass"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangList.getChild()));
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+
+        YangTypeDef typeDef1 = (YangTypeDef) yangList.getChild();
+
+        assertThat(((YangDerivedInfo<?>) typeDef1.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangContainer.getChild().getNextSibling()));
+        assertThat((typeDef1.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+
+        YangTypeDef typeDef2 = (YangTypeDef) yangContainer.getChild().getNextSibling();
+
+        assertThat(((YangDerivedInfo<?>) typeDef2.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild()));
+        assertThat((typeDef2.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when typedef hierarchical references are present
+     * with last type is unresolved.
+     */
+    @Test
+    public void processSelfFileLinkingWithTypdefHierarchicalRefUnresolved() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingWithTypdefHierarchicalRefUnresolved.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild().getNextSibling();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("FirstClass"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangList.getChild()));
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.PARTIALLY_RESOLVED));
+
+        YangTypeDef typeDef1 = (YangTypeDef) yangList.getChild();
+
+        assertThat(((YangDerivedInfo<?>) typeDef1.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangContainer.getChild().getNextSibling()));
+        assertThat((typeDef1.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.PARTIALLY_RESOLVED));
+
+        YangTypeDef typeDef2 = (YangTypeDef) yangContainer.getChild().getNextSibling();
+
+        assertThat(((YangDerivedInfo<?>) typeDef2.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild()));
+        assertThat((typeDef2.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.PARTIALLY_RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when type uses prefix of self module.
+     */
+    @Test
+    public void processSelfFileLinkingWithTypeWithSelfModulePrefix() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingWithTypeWithSelfModulePrefix.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild().getNextSibling();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("FirstClass"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangList.getChild()));
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+
+        YangTypeDef typeDef1 = (YangTypeDef) yangList.getChild();
+
+        assertThat(((YangDerivedInfo<?>) typeDef1.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangContainer.getChild().getNextSibling()));
+        assertThat((typeDef1.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+
+        YangTypeDef typeDef2 = (YangTypeDef) yangContainer.getChild().getNextSibling();
+
+        assertThat(((YangDerivedInfo<?>) typeDef2.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild()));
+        assertThat((typeDef2.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Checks self resolution when some type uses prefix of self module
+     * some uses external prefix.
+     */
+    @Test
+    public void processSelfFileLinkingWithTypeWithSelfAndExternalPrefixMix() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingWithTypeWithSelfAndExternalPrefixMix.yang");
+
+        // Check whether the data model tree returned is of type module.
+        assertThat((node instanceof YangModule), is(true));
+
+        // Check whether the node type is set properly to module.
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+
+        // Check whether the module name is set correctly.
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        YangContainer yangContainer = (YangContainer) node.getChild().getNextSibling();
+
+        YangList yangList = (YangList) yangContainer.getChild();
+
+        ListIterator<YangLeaf> leafIterator = yangList.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getLeafName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("FirstClass"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
+
+        assertThat(((YangDerivedInfo<?>) leafInfo.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) yangList.getChild()));
+        assertThat((leafInfo.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.PARTIALLY_RESOLVED));
+
+        YangTypeDef typeDef1 = (YangTypeDef) yangList.getChild();
+
+        YangTypeDef typeDef2 = (YangTypeDef) yangContainer.getChild().getNextSibling();
+
+        assertThat(((YangDerivedInfo<?>) typeDef2.getDataType().getDataTypeExtendedInfo()).getReferredTypeDef(),
+                is((YangTypeDef) node.getChild()));
+        assertThat((typeDef2.getDataType().getResolvableStatus()),
+                is(ResolvableStatus.RESOLVED));
+    }
+
+    /**
+     * Check self resolution when type referred typedef is not available in
+     * file.
+     */
+    @Test(expected = ParserException.class)
+    public void processSelfResolutionWhenTypeReferredTypedefNotDefined() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfResolutionWhenTypeReferredTypedefNotDefined.yang");
+    }
+
+    /**
+     * Checks self resolution when typedef and leaf using type are at different
+     * level where typedef is is not an ancestor of type.
+     */
+    @Test(expected = ParserException.class)
+    public void processSelfFileLinkingTypedefNotFound() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/SelfFileLinkingTypedefNotFound.yang");
+    }
+
+    /**
+     * Checks hierarchical self resolution with self resolution failure scenario.
+     */
+    @Test(expected = ParserException.class)
+    public void processSelfFileLinkingWithHierarchicalTypeFailureScenario() throws IOException, ParserException {
+
+        YangNode node =
+                manager.getDataModel("src/test/resources/SelfFileLinkingWithHierarchicalTypeFailureScenario.yang");
+    }
+}
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ConfigListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ConfigListenerTest.java
index 7e693d5..cd94ec6 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ConfigListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ConfigListenerTest.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -170,7 +169,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -206,7 +205,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListenerTest.java
index b34209e..60132618 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListenerTest.java
@@ -193,7 +193,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getStatus(), is(YangStatusType.CURRENT));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/DescriptionListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/DescriptionListenerTest.java
index f3042bb..83bc719 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/DescriptionListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/DescriptionListenerTest.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -178,7 +177,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -215,7 +214,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListListenerTest.java
index b150f81..6e1d651 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListListenerTest.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -68,7 +67,7 @@
         YangLeafList leafListInfo = leafListIterator.next();
 
         assertThat(leafListInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafListInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafListInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafListInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafListInfo.getUnits(), is("\"seconds\""));
         assertThat(leafListInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -163,7 +162,7 @@
         YangLeafList leafListInfo = leafListIterator.next();
 
         assertThat(leafListInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafListInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafListInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafListInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafListInfo.getUnits(), is("\"seconds\""));
         assertThat(leafListInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -200,7 +199,7 @@
         YangLeafList leafListInfo = leafListIterator.next();
 
         assertThat(leafListInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafListInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafListInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafListInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafListInfo.getUnits(), is("\"seconds\""));
         assertThat(leafListInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java
index da9bb35..a5863d6 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/LeafListenerTest.java
@@ -68,7 +68,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -162,7 +162,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -225,7 +225,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java
index 86d1a0b..bee66aa 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ListListenerTest.java
@@ -162,7 +162,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getStatus(), is(YangStatusType.CURRENT));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java
index b6a57d9..5a86d33 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/NotificationListenerTest.java
@@ -16,20 +16,18 @@
 
 package org.onosproject.yangutils.parser.impl.listeners;
 
-import org.junit.Test;
-import org.onosproject.yangutils.datamodel.YangNode;
-import org.onosproject.yangutils.datamodel.YangModule;
-import org.onosproject.yangutils.datamodel.YangNotification;
-import org.onosproject.yangutils.datamodel.YangStatusType;
-import org.onosproject.yangutils.datamodel.YangNodeType;
-import org.onosproject.yangutils.datamodel.YangTypeDef;
-import org.onosproject.yangutils.datamodel.YangLeaf;
-import org.onosproject.yangutils.datamodel.YangDataTypes;
-import org.onosproject.yangutils.parser.exceptions.ParserException;
-import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
-
 import java.io.IOException;
 import java.util.ListIterator;
+import org.junit.Test;
+import org.onosproject.yangutils.datamodel.YangLeaf;
+import org.onosproject.yangutils.datamodel.YangModule;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNodeType;
+import org.onosproject.yangutils.datamodel.YangNotification;
+import org.onosproject.yangutils.datamodel.YangStatusType;
+import org.onosproject.yangutils.datamodel.YangTypeDef;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
 
 import static org.hamcrest.core.Is.is;
 import static org.junit.Assert.assertThat;
@@ -63,8 +61,6 @@
         YangTypeDef typeDef = (YangTypeDef) yangNotification.getChild();
         assertThat(typeDef.getName(), is("my-type"));
         assertThat(typeDef.getStatus(), is(YangStatusType.DEPRECATED));
-        assertThat(typeDef.getDerivedType().getDataTypeExtendedInfo()
-                .getBaseType().getDataType(), is(YangDataTypes.INT32));
 
         ListIterator<YangLeaf> leafIterator = yangNotification.getListOfLeaf().listIterator();
         YangLeaf leafInfo = leafIterator.next();
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java
index c398569..a0bcd1c 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/ReferenceListenerTest.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -177,7 +176,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -214,7 +213,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/StatusListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/StatusListenerTest.java
index 984b0f2..ed76c6d 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/StatusListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/StatusListenerTest.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -187,7 +186,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
@@ -224,7 +223,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/TypeListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/TypeListenerTest.java
index a1146aa..d263bb0 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/TypeListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/TypeListenerTest.java
@@ -2,7 +2,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Test;
 import org.onosproject.yangutils.datamodel.YangDataTypes;
 import org.onosproject.yangutils.datamodel.YangLeaf;
@@ -45,7 +44,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"hello\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("hello"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.DERIVED));
     }
 
@@ -71,7 +70,7 @@
         YangLeaf leafInfo = leafIterator.next();
 
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
     }
 
@@ -97,7 +96,7 @@
         YangLeafList leafListInfo = leafListIterator.next();
 
         assertThat(leafListInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafListInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafListInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafListInfo.getDataType().getDataType(), is(YangDataTypes.UINT16));
     }
 }
\ No newline at end of file
diff --git a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/UnitsListenerTest.java b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/UnitsListenerTest.java
index dc5ff59..516848c 100644
--- a/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/UnitsListenerTest.java
+++ b/utils/yangutils/src/test/java/org/onosproject/yangutils/parser/impl/listeners/UnitsListenerTest.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.util.ListIterator;
-
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -117,7 +116,7 @@
 
         // Check whether leaf properties is set correctly.
         assertThat(leafInfo.getLeafName(), is("invalid-interval"));
-        assertThat(leafInfo.getDataType().getDataTypeName(), is("\"uint16\""));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("uint16"));
         assertThat(leafInfo.getUnits(), is("\"seconds\""));
         assertThat(leafInfo.getDescription(), is("\"Interval before a route is declared invalid\""));
         assertThat(leafInfo.isConfig(), is(true));
diff --git a/utils/yangutils/src/test/resources/DerivedTypeStatement.yang b/utils/yangutils/src/test/resources/DerivedTypeStatement.yang
index c678822..952b7d4 100644
--- a/utils/yangutils/src/test/resources/DerivedTypeStatement.yang
+++ b/utils/yangutils/src/test/resources/DerivedTypeStatement.yang
@@ -3,6 +3,6 @@
     namespace http://huawei.com;
     prefix Ant;
     leaf invalid-interval {
-        type "hello";
+        type P:hello;
     }
-}
\ No newline at end of file
+}
diff --git a/utils/yangutils/src/test/resources/GroupingAttributes.yang b/utils/yangutils/src/test/resources/GroupingAttributes.yang
index 7eb3880..977adc5 100644
--- a/utils/yangutils/src/test/resources/GroupingAttributes.yang
+++ b/utils/yangutils/src/test/resources/GroupingAttributes.yang
@@ -5,17 +5,17 @@
     list valid {
         key address;
         leaf address {
-            type ip;
+            type P:ip;
         }
         grouping endpoint {
             description "grouping under test";
             status current;
             reference "RFC 6020";
             leaf address {
-                type ip-address;
+                type P:ip-address;
             }
             leaf port {
-                type port-number;
+                type P:port-number;
             }
         }
     }
diff --git a/utils/yangutils/src/test/resources/GroupingInContainer.yang b/utils/yangutils/src/test/resources/GroupingInContainer.yang
index be9e7e8..7c51913 100644
--- a/utils/yangutils/src/test/resources/GroupingInContainer.yang
+++ b/utils/yangutils/src/test/resources/GroupingInContainer.yang
@@ -5,10 +5,10 @@
     container valid {
         grouping endpoint {
             leaf address {
-                type ip-address;
+                type P:ip-address;
             }
             leaf port {
-                type port-number;
+                type P:port-number;
             }
         }
     }
diff --git a/utils/yangutils/src/test/resources/GroupingInList.yang b/utils/yangutils/src/test/resources/GroupingInList.yang
index 2cdf7d1..a8fad09 100644
--- a/utils/yangutils/src/test/resources/GroupingInList.yang
+++ b/utils/yangutils/src/test/resources/GroupingInList.yang
@@ -5,14 +5,14 @@
     list valid {
         key address;
         leaf address {
-            type ip;
+            type P:ip;
         }
         grouping endpoint {
             leaf address {
-                type ip-address;
+                type P:ip-address;
             }
             leaf port {
-                type port-number;
+                type P:port-number;
             }
         }
     }
diff --git a/utils/yangutils/src/test/resources/GroupingInModule.yang b/utils/yangutils/src/test/resources/GroupingInModule.yang
index d0a31c1..7d513a4 100644
--- a/utils/yangutils/src/test/resources/GroupingInModule.yang
+++ b/utils/yangutils/src/test/resources/GroupingInModule.yang
@@ -4,10 +4,10 @@
     prefix Ant;
     grouping endpoint {
         leaf address {
-            type ip-address;
+            type P:ip-address;
         }
         leaf port {
-            type port-number;
+            type P:port-number;
         }
     }
 }
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtMiddleLevelAfterParentHolder.yang b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtMiddleLevelAfterParentHolder.yang
new file mode 100644
index 0000000..c372bfa
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtMiddleLevelAfterParentHolder.yang
@@ -0,0 +1,16 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type hello;
+            }
+        }
+        typedef hello {
+            type String;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtRootIsAfterContainerHavingType.yang b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtRootIsAfterContainerHavingType.yang
new file mode 100644
index 0000000..052cb7e
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtRootIsAfterContainerHavingType.yang
@@ -0,0 +1,16 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type hello;
+            }
+        }
+    }
+    typedef hello {
+        type String;
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtRootTypeTwoLevelInHierarchy.yang b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtRootTypeTwoLevelInHierarchy.yang
new file mode 100644
index 0000000..2b4a1e8
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefAtRootTypeTwoLevelInHierarchy.yang
@@ -0,0 +1,16 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef hello {
+        type String;
+    }
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type hello;
+            }
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingTypedefNotFound.yang b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefNotFound.yang
new file mode 100644
index 0000000..9248598
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingTypedefNotFound.yang
@@ -0,0 +1,18 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type hello;
+            }
+        }
+    }
+    container isis {
+        typedef hello {
+            type String;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingWithHierarchicalTypeFailureScenario.yang b/utils/yangutils/src/test/resources/SelfFileLinkingWithHierarchicalTypeFailureScenario.yang
new file mode 100644
index 0000000..71d1947
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingWithHierarchicalTypeFailureScenario.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef Percentage {
+    type INT;
+    }
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type Ant:FirstClass;
+            }
+            typedef FirstClass {
+                type Ant:PassingClass;
+            }
+        }
+        typedef PassingClass {
+            type Percentage;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingWithTypdefHierarchicalRefUnresolved.yang b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypdefHierarchicalRefUnresolved.yang
new file mode 100644
index 0000000..35c28b6
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypdefHierarchicalRefUnresolved.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef Percentage {
+    type P:Per;
+    }
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type FirstClass;
+            }
+            typedef FirstClass {
+                type PassingClass;
+            }
+        }
+        typedef PassingClass {
+            type Percentage;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingWithTypdefHierarchicalReference.yang b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypdefHierarchicalReference.yang
new file mode 100644
index 0000000..958dc23
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypdefHierarchicalReference.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef Percentage {
+    type int32;
+    }
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type FirstClass;
+            }
+            typedef FirstClass {
+                type PassingClass;
+            }
+        }
+        typedef PassingClass {
+            type Percentage;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingWithTypeWithSelfAndExternalPrefixMix.yang b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypeWithSelfAndExternalPrefixMix.yang
new file mode 100644
index 0000000..038c7de
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypeWithSelfAndExternalPrefixMix.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef Percentage {
+    type int32;
+    }
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type Ant:FirstClass;
+            }
+            typedef FirstClass {
+                type P:PassingClass;
+            }
+        }
+        typedef PassingClass {
+            type Ant:Percentage;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingWithTypeWithSelfModulePrefix.yang b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypeWithSelfModulePrefix.yang
new file mode 100644
index 0000000..4f292b8
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingWithTypeWithSelfModulePrefix.yang
@@ -0,0 +1,22 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef Percentage {
+    type int32;
+    }
+    container ospf {
+        list valid {
+            key "invalid-interval";
+            leaf invalid-interval {
+                type Ant:FirstClass;
+            }
+            typedef FirstClass {
+                type PassingClass;
+            }
+        }
+        typedef PassingClass {
+            type Ant:Percentage;
+        }
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfResolutionWhenTypeAndTypedefAtRootLevel.yang b/utils/yangutils/src/test/resources/SelfResolutionWhenTypeAndTypedefAtRootLevel.yang
new file mode 100644
index 0000000..b6b08a7
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfResolutionWhenTypeAndTypedefAtRootLevel.yang
@@ -0,0 +1,11 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    leaf invalid-interval {
+        type hello;
+    }
+    typedef hello {
+        type String;
+    }
+}
diff --git a/utils/yangutils/src/test/resources/SelfResolutionWhenTypeReferredTypedefNotDefined.yang b/utils/yangutils/src/test/resources/SelfResolutionWhenTypeReferredTypedefNotDefined.yang
new file mode 100644
index 0000000..499e10d
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfResolutionWhenTypeReferredTypedefNotDefined.yang
@@ -0,0 +1,11 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    leaf invalid-interval {
+        type hello;
+    }
+    typedef hi {
+        type String;
+    }
+}
diff --git a/utils/yangutils/src/test/resources/UsesInList.yang b/utils/yangutils/src/test/resources/UsesInList.yang
index 6443cfa..c4fd47d 100644
--- a/utils/yangutils/src/test/resources/UsesInList.yang
+++ b/utils/yangutils/src/test/resources/UsesInList.yang
@@ -5,7 +5,7 @@
     list valid {
         key address;
         leaf address {
-            type ip;
+            type P:ip;
         }
         uses endpoint {
             description "grouping under test";
diff --git a/utils/yangutils/src/test/resources/ValidNotificationStatement.yang b/utils/yangutils/src/test/resources/ValidNotificationStatement.yang
index b96fc54..d588bb9 100644
--- a/utils/yangutils/src/test/resources/ValidNotificationStatement.yang
+++ b/utils/yangutils/src/test/resources/ValidNotificationStatement.yang
@@ -16,10 +16,10 @@
            }
         }
         leaf if-admin-status {
-           type admin-status;
+           type P:admin-status;
         }
         leaf if-oper-status {
-           type oper-status;
+           type P:oper-status;
         }
     }
 }
diff --git a/utils/yangutils/src/test/resources/processTypeDef.yang b/utils/yangutils/src/test/resources/processTypeDef.yang
new file mode 100644
index 0000000..2875752
--- /dev/null
+++ b/utils/yangutils/src/test/resources/processTypeDef.yang
@@ -0,0 +1,11 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef hello {
+        type String;
+    }
+    leaf invalid-interval {
+        type hello;
+    }
+}