diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/ASTTypeUtil.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/ASTTypeUtil.java
index 70e3e79e474..3cf1b9bc373 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/ASTTypeUtil.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/ASTTypeUtil.java
@@ -315,7 +315,7 @@ public class ASTTypeUtil {
 			final ICPPTemplateParameter tpar = (ICPPTemplateParameter) type;
 			if (normalize) {
 				result.append('#');
-				result.append(Integer.toString(tpar.getParameterPosition(), 16));
+				result.append(Integer.toString(tpar.getParameterID(), 16));
 			} else {
 				result.append(tpar.getName());
 			}
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPTemplateParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPTemplateParameter.java
index 43954502856..eb44be0589a 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPTemplateParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPTemplateParameter.java
@@ -18,38 +18,44 @@ package org.eclipse.cdt.core.dom.ast.cpp;
  */
 public interface ICPPTemplateParameter extends ICPPBinding {
 	public static final ICPPTemplateParameter[] EMPTY_TEMPLATE_PARAMETER_ARRAY = new ICPPTemplateParameter[0];
-	
+
 	/**
-	 * The position of the template parameter is determined by the nesting level of the template 
-	 * declaration and the offset of this parameter within the template parameter list. 
-	 * In every context where a template parameter can be referenced (i.e. within a template declaration) 
-	 * the parameter position is unique. 
+	 * Returns the zero-based position of this parameter within the template parameter list it belongs to. 
+	 * @since 5.1
+	 */
+	short getParameterPosition();
+
+	/**
+	 * Returns the nesting-level of the template declaration this parameter belongs to.
 	 * <p>
-	 * The nesting level is determined by counting the template declarations that enclose the one that 
-	 * declares this parameter. The position is then computed by 
-	 * <code>(nesting-level << 16) + position-in-parameter-list</code>.
-	 * <p> 
-	 * Example: 
+	 * The nesting level is determined by counting enclosing template declarations,
+	 * for example:
 	 * <pre>
 	 * namespace ns {
-	 *    template<typename T> class X {       // parameter position: 0x00000000
-	 *       template<typename U> class Y1 {   // parameter position: 0x00010000
+	 *    template<typename T> class X {       // nesting level 0
+	 *       template<typename U> class Y1 {   // nesting level 1
 	 *       };
 	 *       class Y2 {
-	 *          template typename<V> class Z { // parameter position: 0x00010000
+	 *          template typename<V> class Z { // nesting level 1
 	 *             void m();
 	 *          };  
 	 *       };
 	 *    };
 	 * }
-	 * template<typename T>                    // parameter position 0x00000000
-	 *    template <typename V>                // parameter position 0x00010000
+	 * template<typename T>                    // nesting level 0
+	 *    template <typename V>                // nesting level 1
 	 *       void ns::X<T>::Y2::Z<V>::m() {}
 	 * </pre>
 	 * @since 5.1
 	 */
-	int getParameterPosition();
-
+	short getTemplateNestingLevel();
+	
+	/**
+	 * Returns {@code (getTemplateNestingLevel() << 16) + getParameterPosition()}.
+	 * @since 5.1
+	 */
+	int getParameterID();
+	
 	/**
 	 * Returns the default value for this template parameter, or <code>null</code>.
 	 * @since 5.1
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java
index b0c4ba1586d..d4e7a38702a 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/Value.java
@@ -99,7 +99,7 @@ public class Value implements IValue {
 	}
 
 	/**
-	 * Tests whether the value is a template parameter, returns the parameter position of the
+	 * Tests whether the value is a template parameter, returns the parameter id of the
 	 * parameter, or <code>null</code> if it is not a template parameter.
 	 */
 	public static int isTemplateParameter(IValue tval) {
@@ -265,7 +265,7 @@ public class Value implements IValue {
 	
 	@SuppressWarnings("nls")
 	private static String evaluate(ICPPTemplateParameter param) {
-		return "#" + Integer.toHexString(param.getParameterPosition());
+		return "#" + Integer.toHexString(param.getParameterID());
 	}
 	
 	@SuppressWarnings("nls")
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateDefinition.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateDefinition.java
index f6d246fa610..fb1d6c8cc52 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateDefinition.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateDefinition.java
@@ -247,7 +247,7 @@ public abstract class CPPTemplateDefinition extends PlatformObject implements IC
 	}
 	
 	public IBinding resolveTemplateParameter(ICPPTemplateParameter templateParameter) {
-		int pos= templateParameter.getParameterPosition() & 0xffff;
+		int pos= templateParameter.getParameterPosition();
 		
     	int tdeclLen= declarations == null ? 0 : declarations.length;
     	for (int i= -1; i < tdeclLen; i++) {
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameter.java
index 875bbad1189..6463d051d71 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameter.java
@@ -38,11 +38,11 @@ import org.eclipse.core.runtime.PlatformObject;
 public abstract class CPPTemplateParameter extends PlatformObject 
 		implements ICPPTemplateParameter, ICPPInternalBinding, ICPPTwoPhaseBinding {
 	private IASTName[] declarations;
-	private final int position;
+	private final int fParameterID;
 	
 	public CPPTemplateParameter(IASTName name) {
 		declarations = new IASTName[] {name};
-		position= computeParameterPosition(name);
+		fParameterID= computeParameterPosition(name);
 	}
 
 	private int computeParameterPosition(IASTName name) {
@@ -105,8 +105,16 @@ public abstract class CPPTemplateParameter extends PlatformObject
 		return declarations[0].toCharArray();
 	}
 
-	public int getParameterPosition() {
-		return position;
+	public int getParameterID() {
+		return fParameterID;
+	}
+
+	public short getParameterPosition() {
+		return (short) fParameterID;
+	}
+
+	public short getTemplateNestingLevel() {
+		return (short) (fParameterID >> 16);
 	}
 
 	public IASTName getPrimaryDeclaration () {
@@ -239,7 +247,7 @@ public abstract class CPPTemplateParameter extends PlatformObject
 		// use parameter from the index
 		try {
 			ICPPTemplateParameter[] params = template.getTemplateParameters();
-			final int pos= position & 0xffff;
+			final int pos= getParameterPosition();
 			if (pos < params.length) 
 				return params[pos];
 		} catch (DOMException e) {
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameterMap.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameterMap.java
index 7c7b155c291..739c87e11e7 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameterMap.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateParameterMap.java
@@ -35,36 +35,36 @@ public class CPPTemplateParameterMap implements ICPPTemplateParameterMap {
 	 * Returns whether the map contains the given parameter
 	 */
 	public boolean contains(ICPPTemplateParameter templateParameter) {
-		return fMap.containsKey(templateParameter.getParameterPosition());
+		return fMap.containsKey(templateParameter.getParameterID());
 	}
 
 	/**
 	 * Adds the mapping to the map.
 	 */
 	public void put(ICPPTemplateParameter param, ICPPTemplateArgument value) {
-		fMap.put(param.getParameterPosition(), value);
+		fMap.put(param.getParameterID(), value);
 	}
 
 	/**
 	 * Adds the mapping to the map.
 	 */
-	public void put(int parameterPos, ICPPTemplateArgument value) {
-		fMap.put(parameterPos, value);
+	public void put(int parameterID, ICPPTemplateArgument value) {
+		fMap.put(parameterID, value);
 	}
 
 	/**
 	 * Returns the value for the given parameter.
 	 */
 	public ICPPTemplateArgument getArgument(ICPPTemplateParameter param) {
-		return (ICPPTemplateArgument) fMap.get(param.getParameterPosition());
+		return (ICPPTemplateArgument) fMap.get(param.getParameterID());
 	}
 
 	/**
-	 * Returns the value for the template parameter at the given position.
-	 * @see ICPPTemplateParameter#getParameterPosition()
+	 * Returns the value for the template parameter with the given id.
+	 * @see ICPPTemplateParameter#getParameterID()
 	 */
-	public ICPPTemplateArgument getArgument(int paramPosition) {
-		return (ICPPTemplateArgument) fMap.get(paramPosition);
+	public ICPPTemplateArgument getArgument(int paramID) {
+		return (ICPPTemplateArgument) fMap.get(paramID);
 	}
 
 	/**
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTemplateParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTemplateParameter.java
index 773a908fb47..6eeae80b2e9 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTemplateParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTemplateParameter.java
@@ -168,7 +168,7 @@ public class CPPTemplateTemplateParameter extends CPPTemplateParameter implement
 		if (!(type instanceof ICPPTemplateTemplateParameter))
 			return false;
 
-		return getParameterPosition() == ((ICPPTemplateParameter) type).getParameterPosition();
+		return getParameterID() == ((ICPPTemplateParameter) type).getParameterID();
 	}
 
 	public ICPPClassTemplatePartialSpecialization[] getPartialSpecializations() throws DOMException {
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTypeParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTypeParameter.java
index 6e09ee9902a..a7debcbf46a 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTypeParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPTemplateTypeParameter.java
@@ -73,7 +73,7 @@ public class CPPTemplateTypeParameter extends CPPTemplateParameter implements
         if (!(type instanceof ICPPTemplateTypeParameter))
         	return false;
         
-        return getParameterPosition() == ((ICPPTemplateParameter) type).getParameterPosition();
+        return getParameterID() == ((ICPPTemplateParameter) type).getParameterID();
     }
 
 	public IASTName getUnknownName() {
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java
index 67fb0f1d0ef..ac25268ec54 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPTemplates.java
@@ -253,7 +253,7 @@ public class CPPTemplates {
 
 	private static boolean argIsParameter(ICPPTemplateArgument arg, ICPPTemplateParameter param) {
 		if (param instanceof ICPPTemplateNonTypeParameter) {
-			return arg.isNonTypeValue() && Value.isTemplateParameter(arg.getNonTypeValue()) == param.getParameterPosition();
+			return arg.isNonTypeValue() && Value.isTemplateParameter(arg.getNonTypeValue()) == param.getParameterID();
 		}
 		if (param instanceof IType) {
 			return arg.isTypeValue() && ((IType) param).isSameType(arg.getTypeValue());
@@ -1917,7 +1917,7 @@ public class CPPTemplates {
 					return false;
 			} else {
 				int parpos= Value.isTemplateParameter(arg.getNonTypeValue());
-				if (parpos != par.getParameterPosition())
+				if (parpos != par.getParameterID())
 					return false;
 			}
 		}
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateNonTypeParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateNonTypeParameter.java
index b0a67d9d351..12b2495a58f 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateNonTypeParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateNonTypeParameter.java
@@ -34,10 +34,18 @@ public class CompositeCPPTemplateNonTypeParameter extends CompositeCPPVariable i
 		fail(); return null; 
 	}
 
-	public int getParameterPosition() {
+	public short getParameterPosition() {
 		return ((ICPPTemplateParameter)rbinding).getParameterPosition();
 	}
+
+	public short getTemplateNestingLevel() {
+		return ((ICPPTemplateParameter)rbinding).getTemplateNestingLevel();
+	}
 	
+	public int getParameterID() {
+		return ((ICPPTemplateParameter)rbinding).getParameterID();
+	}
+
 	public ICPPTemplateArgument getDefaultValue() {
 		try {
 			return TemplateInstanceUtil.convert(cf, ((ICPPTemplateTypeParameter)rbinding).getDefaultValue());
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateTypeParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateTypeParameter.java
index de6db323197..7c936536bb7 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateTypeParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/index/composite/cpp/CompositeCPPTemplateTypeParameter.java
@@ -37,10 +37,18 @@ public class CompositeCPPTemplateTypeParameter extends CompositeCPPBinding
 		return cf.getCompositeType(preresult);
 	}
 
-	public int getParameterPosition() {
+	public short getParameterPosition() {
 		return ((ICPPTemplateParameter)rbinding).getParameterPosition();
 	}
 
+	public short getTemplateNestingLevel() {
+		return ((ICPPTemplateParameter)rbinding).getTemplateNestingLevel();
+	}
+	
+	public int getParameterID() {
+		return ((ICPPTemplateParameter)rbinding).getParameterID();
+	}
+
 	public boolean isSameType(IType type) {
 		return ((IType)rbinding).isSameType(type);
 	}
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPClassTemplate.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPClassTemplate.java
index e0fa963acb1..389a5a47dd5 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPClassTemplate.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPClassTemplate.java
@@ -237,7 +237,7 @@ public class PDOMCPPClassTemplate extends PDOMCPPClassType
 
 	public ICPPTemplateParameter adaptTemplateParameter(ICPPTemplateParameter param) {
 		// Template parameters are identified by their position in the parameter list.
-		int pos = param.getParameterPosition() & 0xFFFF;
+		int pos = param.getParameterPosition();
 		if (params != null) {
 			return pos < params.length ? params[pos] : null;
 		}
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPFunctionTemplate.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPFunctionTemplate.java
index ec200d59513..adf700e116f 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPFunctionTemplate.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPFunctionTemplate.java
@@ -128,7 +128,7 @@ class PDOMCPPFunctionTemplate extends PDOMCPPFunction
 
 	public ICPPTemplateParameter adaptTemplateParameter(ICPPTemplateParameter param) {
 		// Template parameters are identified by their position in the parameter list.
-		int pos = param.getParameterPosition() & 0xFFFF;
+		int pos = param.getParameterPosition();
 		try {
 			PDOMNodeLinkedList list = new PDOMNodeLinkedList(pdom, record + TEMPLATE_PARAMS, getLinkageImpl());
 			return (ICPPTemplateParameter) list.getNodeAt(pos);
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateNonTypeParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateNonTypeParameter.java
index 094f06f4b9b..06573644fc4 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateNonTypeParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateNonTypeParameter.java
@@ -37,9 +37,10 @@ class PDOMCPPTemplateNonTypeParameter extends PDOMCPPVariable implements IPDOMMe
 		ICPPTemplateNonTypeParameter {
 
 	private static final int MEMBERLIST = PDOMCPPVariable.RECORD_SIZE;
-	private static final int PARAMETERPOS= PDOMCPPVariable.RECORD_SIZE + 4;
+	private static final int PARAMETERID= PDOMCPPVariable.RECORD_SIZE + 4;
 	private static final int DEFAULTVAL= PDOMCPPVariable.RECORD_SIZE + 8;
 
+	private int fCachedParamID= -1;
 
 	/**
 	 * The size in bytes of a PDOMCPPTemplateTypeParameter record in the database.
@@ -51,7 +52,7 @@ class PDOMCPPTemplateNonTypeParameter extends PDOMCPPVariable implements IPDOMMe
 			ICPPTemplateNonTypeParameter param) throws CoreException {
 		super(pdom, parent, param);
 		final Database db = pdom.getDB();
-		db.putInt(record + PARAMETERPOS, param.getParameterPosition());
+		db.putInt(record + PARAMETERID, param.getParameterID());
 		ICPPTemplateArgument val= param.getDefaultValue();
 		if (val != null) {
 			IValue sval= val.getNonTypeValue();
@@ -92,13 +93,30 @@ class PDOMCPPTemplateNonTypeParameter extends PDOMCPPVariable implements IPDOMMe
 		}
 	}
 
-	public int getParameterPosition() {
-		try {
-			final Database db = pdom.getDB();
-			return db.getInt(record + PARAMETERPOS);
-		} catch (CoreException e) {
-			CCorePlugin.log(e);
-			return -1;
+	public short getParameterPosition() {
+		readParamID();
+		return (short) fCachedParamID;
+	}
+	
+	public short getTemplateNestingLevel() {
+		readParamID();
+		return (short)(fCachedParamID >> 16);
+	}
+	
+	public int getParameterID() {
+		readParamID();
+		return fCachedParamID;
+	}
+	
+	private void readParamID() {
+		if (fCachedParamID == -1) {
+			try {
+				final Database db = pdom.getDB();
+				fCachedParamID= db.getInt(record + PARAMETERID);
+			} catch (CoreException e) {
+				CCorePlugin.log(e);
+				fCachedParamID= -2;
+			}
 		}
 	}
 
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateTypeParameter.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateTypeParameter.java
index 4ced778fcf3..c41d3410c9c 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateTypeParameter.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPTemplateTypeParameter.java
@@ -43,14 +43,16 @@ class PDOMCPPTemplateTypeParameter extends PDOMCPPBinding implements IPDOMMember
 
 	private static final int DEFAULT_TYPE = PDOMCPPBinding.RECORD_SIZE + 0;	
 	private static final int MEMBERLIST = PDOMCPPBinding.RECORD_SIZE + 4;
-	private static final int PARAMETERPOS= PDOMCPPBinding.RECORD_SIZE + 8;
+	private static final int PARAMETERID= PDOMCPPBinding.RECORD_SIZE + 8;
 
 	/**
 	 * The size in bytes of a PDOMCPPTemplateTypeParameter record in the database.
 	 */
 	@SuppressWarnings("hiding")
 	protected static final int RECORD_SIZE = PDOMCPPBinding.RECORD_SIZE + 12;
+	
 	private ICPPScope fUnknownScope;
+	private int fCachedParamID= -1;
 	
 	public PDOMCPPTemplateTypeParameter(PDOM pdom, PDOMNode parent,
 			ICPPTemplateTypeParameter param) throws CoreException {
@@ -58,7 +60,7 @@ class PDOMCPPTemplateTypeParameter extends PDOMCPPBinding implements IPDOMMember
 		
 		try {
 			final Database db = pdom.getDB();
-			db.putInt(record + PARAMETERPOS, param.getParameterPosition());
+			db.putInt(record + PARAMETERID, param.getParameterID());
 			IType dflt = param.getDefault();
 			if (dflt != null) {
 				PDOMNode typeNode = getLinkageImpl().addType(this, dflt);
@@ -85,13 +87,30 @@ class PDOMCPPTemplateTypeParameter extends PDOMCPPBinding implements IPDOMMember
 		return IIndexCPPBindingConstants.CPP_TEMPLATE_TYPE_PARAMETER;
 	}
 	
-	public int getParameterPosition() {
-		try {
-			final Database db = pdom.getDB();
-			return db.getInt(record + PARAMETERPOS);
-		} catch (CoreException e) {
-			CCorePlugin.log(e);
-			return -1;
+	public short getParameterPosition() {
+		readParamID();
+		return (short) fCachedParamID;
+	}
+	
+	public short getTemplateNestingLevel() {
+		readParamID();
+		return (short)(fCachedParamID >> 16);
+	}
+	
+	public int getParameterID() {
+		readParamID();
+		return fCachedParamID;
+	}
+	
+	private void readParamID() {
+		if (fCachedParamID == -1) {
+			try {
+				final Database db = pdom.getDB();
+				fCachedParamID= db.getInt(record + PARAMETERID);
+			} catch (CoreException e) {
+				CCorePlugin.log(e);
+				fCachedParamID= -2;
+			}
 		}
 	}
 
@@ -115,7 +134,7 @@ class PDOMCPPTemplateTypeParameter extends PDOMCPPBinding implements IPDOMMember
         if (!(type instanceof ICPPTemplateTypeParameter))
         	return false;
         
-        return getParameterPosition() == ((ICPPTemplateParameter) type).getParameterPosition();
+        return getParameterID() == ((ICPPTemplateParameter) type).getParameterID();
 	}
 
 	public IType getDefault() {