diff --git a/wst/trunk/tests/test_suite/files/class_extent_native_type.xsd b/wst/trunk/tests/test_suite/files/class_extent_native_type.xsd
index 35521a5c2..c1e858508 100644
--- a/wst/trunk/tests/test_suite/files/class_extent_native_type.xsd
+++ b/wst/trunk/tests/test_suite/files/class_extent_native_type.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<schema xmlns:tns="class_extent_native_type" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="class_extent_native_type">
+<schema xmlns:tns="class_extent_native_type" xmlns:wst="urn:wst_base" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="class_extent_native_type">
 
   <xsd:complexType name="TExtendString">
 		<xsd:simpleContent>
@@ -12,7 +12,7 @@
   <xsd:complexType name="TExtendBase64String">
     <xsd:simpleContent>
       <xsd:extension base="xsd:base64Binary">
-        <xsd:attribute use="required" name="strAtt" type="xsd:string"/>
+        <xsd:attribute use="required" name="strAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
       </xsd:extension>
     </xsd:simpleContent>
   </xsd:complexType>
diff --git a/wst/trunk/tests/test_suite/files/class_headerblock_derived.xsd b/wst/trunk/tests/test_suite/files/class_headerblock_derived.xsd
index 0c0e31fa9..95e552017 100644
--- a/wst/trunk/tests/test_suite/files/class_headerblock_derived.xsd
+++ b/wst/trunk/tests/test_suite/files/class_headerblock_derived.xsd
@@ -6,10 +6,10 @@
   <xsd:complexType name="TSampleHeader" wst:wst_headerBlock="true">
     <xsd:sequence>
       <xsd:element name="intField" type="xsd:int"/>
-      <xsd:element name="strField" type="xsd:string"/>
+      <xsd:element name="strField" type="xsd:string" wst:TypeHint="UnicodeString"/>
       <xsd:element name="floatField" type="xsd:float"/>
     </xsd:sequence>
-    <xsd:attribute use="required" name="strAtt" type="xsd:string"/>
+    <xsd:attribute use="required" name="strAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
     <xsd:attribute use="required" name="intAtt" type="xsd:int"/>
   </xsd:complexType>
 </schema>
diff --git a/wst/trunk/tests/test_suite/files/class_headerblock_simplecontent_derived.xsd b/wst/trunk/tests/test_suite/files/class_headerblock_simplecontent_derived.xsd
index cafb44b0a..8cce1fcbc 100644
--- a/wst/trunk/tests/test_suite/files/class_headerblock_simplecontent_derived.xsd
+++ b/wst/trunk/tests/test_suite/files/class_headerblock_simplecontent_derived.xsd
@@ -5,7 +5,7 @@
     xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
     targetNamespace="class_headerblock_simplecontent_derived">
   <xsd:complexType name="TSampleHeader" wst:wst_headerBlockSimpleContent="true">
-    <xsd:attribute use="required" name="strAtt" type="xsd:string"/>
+    <xsd:attribute use="required" name="strAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
     <xsd:attribute use="required" name="intAtt" type="xsd:int"/>
   </xsd:complexType>
 </schema>
diff --git a/wst/trunk/tests/test_suite/files/class_properties_default.xsd b/wst/trunk/tests/test_suite/files/class_properties_default.xsd
index 18c59c240..fdf8d10d3 100644
--- a/wst/trunk/tests/test_suite/files/class_properties_default.xsd
+++ b/wst/trunk/tests/test_suite/files/class_properties_default.xsd
@@ -1,12 +1,12 @@
-<?xml version="1.0"?>
-<schema targetNamespace="class_properties_default" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="class_properties_default">
-	<xsd:complexType name="TClassSampleType">
-		<xsd:sequence>
-			<xsd:element name="intField" type="xsd:int" default="1210"/>
-			<xsd:element name="strField" type="xsd:string" default="azerty"/>
-			<xsd:element name="floatField" type="xsd:float" default="1234"/>
-		</xsd:sequence>
-		<xsd:attribute name="strAtt" type="xsd:string" default="attribute azerty" use="required"/>
-		<xsd:attribute name="intAtt" type="xsd:int" default="789" use="required"/>
-	</xsd:complexType>
+<?xml version="1.0" encoding="utf-8"?>
+<schema xmlns:tns="class_properties_default" xmlns:wst="urn:wst_base" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="class_properties_default">
+  <xsd:complexType name="TClassSampleType">
+    <xsd:sequence>
+      <xsd:element name="intField" type="xsd:int" default="1210"/>
+      <xsd:element name="strField" type="xsd:string" default="azerty" wst:TypeHint="UnicodeString"/>
+      <xsd:element name="floatField" type="xsd:float" default="1234"/>
+    </xsd:sequence>
+    <xsd:attribute use="required" name="strAtt" type="xsd:string" default="attribute azerty" wst:TypeHint="UnicodeString"/>
+    <xsd:attribute use="required" name="intAtt" type="xsd:int" default="789"/>
+  </xsd:complexType>
 </schema>
diff --git a/wst/trunk/tests/test_suite/files/class_properties_extended_metadata.xsd b/wst/trunk/tests/test_suite/files/class_properties_extended_metadata.xsd
index d3e78dfe3..a3c05b446 100644
--- a/wst/trunk/tests/test_suite/files/class_properties_extended_metadata.xsd
+++ b/wst/trunk/tests/test_suite/files/class_properties_extended_metadata.xsd
@@ -1,18 +1,12 @@
-<schema targetNamespace="urn:wst-test" 
-  xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
-  xmlns:tns="urn:wst-test"
-  xmlns:ns3="uri-4"
-  xmlns:ns4="uri-5"
-  >
-  
-	<xsd:complexType name="TClassSampleType">
-		<xsd:sequence>
-			<xsd:element name="intField" type="xsd:int" ns3:a="1210" ns3:b="ns4:xx"/>
-			<xsd:element name="strField" type="xsd:string" default="azerty" ns3:a="xsd:int"/>
-			<xsd:element name="floatField" type="xsd:float"/>
-		</xsd:sequence>
-		<xsd:attribute name="strAtt" type="xsd:string" default="attribute azerty" use="required" ns3:a="optional"/>
-		<xsd:attribute name="intAtt" type="xsd:int" use="required"/>
-	</xsd:complexType>
-  
+<?xml version="1.0" encoding="utf-8"?>
+<schema xmlns:ns3="uri-4" xmlns:ns4="uri-5" xmlns:tns="urn:wst-test" xmlns:wst="urn:wst_base" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
+  <xsd:complexType name="TClassSampleType">
+    <xsd:sequence>
+      <xsd:element name="intField" type="xsd:int" ns3:a="1210" ns3:b="ns4:xx"/>
+      <xsd:element name="strField" type="xsd:string" ns3:a="xsd:int" default="azerty" wst:TypeHint="UnicodeString"/>
+      <xsd:element name="floatField" type="xsd:float"/>
+    </xsd:sequence>
+    <xsd:attribute use="required" name="strAtt" type="xsd:string" ns3:a="optional" default="attribute azerty" wst:TypeHint="UnicodeString"/>
+    <xsd:attribute use="required" name="intAtt" type="xsd:int"/>
+  </xsd:complexType>
 </schema>
diff --git a/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any.xsd b/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any.xsd
index 6c62010b6..7bac223fd 100644
--- a/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any.xsd
+++ b/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<schema xmlns:tns="urn:wst-test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
+<schema xmlns:tns="urn:wst-test" xmlns:wst="urn:wst_base" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
   <xsd:complexType name="TComplexType">
     <xsd:sequence>
       <xsd:any maxOccurs="unbounded" minOccurs="0" processContents="lax"/>
@@ -7,19 +7,19 @@
   </xsd:complexType>
   <xsd:complexType name="TComplexType2">
     <xsd:sequence>
-      <xsd:element name="strField" type="xsd:string"/>
+      <xsd:element name="strField" type="xsd:string" wst:TypeHint="UnicodeString"/>
       <xsd:any maxOccurs="unbounded" minOccurs="0" processContents="lax"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="TComplexTypeParent">
     <xsd:sequence>
-      <xsd:element name="strFieldParent" type="xsd:string"/>
+      <xsd:element name="strFieldParent" type="xsd:string" wst:TypeHint="UnicodeString"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="TComplexTypeChild">
     <xsd:extension base="tns:TComplexTypeParent">
       <xsd:sequence>
-        <xsd:element name="strFieldChild" type="xsd:string"/>
+        <xsd:element name="strFieldChild" type="xsd:string" wst:TypeHint="UnicodeString"/>
         <xsd:any maxOccurs="10" minOccurs="2" processContents="skip"/>
       </xsd:sequence>
     </xsd:extension>
diff --git a/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_anyatt.xsd b/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_anyatt.xsd
index 80f065cd5..72f8f000f 100644
--- a/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_anyatt.xsd
+++ b/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_anyatt.xsd
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<schema xmlns:tns="urn:wst-test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
+<schema xmlns:tns="urn:wst-test" xmlns:wst="urn:wst_base" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
   <xsd:complexType name="TComplexType">
     <xsd:sequence>
       <xsd:any maxOccurs="unbounded" minOccurs="0" processContents="lax"/>
@@ -8,23 +8,23 @@
   </xsd:complexType>
   <xsd:complexType name="TComplexType2">
     <xsd:sequence>
-      <xsd:element name="strField" type="xsd:string"/>
-      <xsd:element name="strFieldAtt" type="xsd:string"/>
+      <xsd:element name="strField" type="xsd:string" wst:TypeHint="UnicodeString"/>
+      <xsd:element name="strFieldAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
       <xsd:any maxOccurs="unbounded" minOccurs="0" processContents="lax"/>
     </xsd:sequence>
     <xsd:anyAttribute processContents="strict"/>
   </xsd:complexType>
   <xsd:complexType name="TComplexTypeParent">
     <xsd:sequence>
-      <xsd:element name="strFieldParent" type="xsd:string"/>
-      <xsd:element name="strFieldParentAtt" type="xsd:string"/>
+      <xsd:element name="strFieldParent" type="xsd:string" wst:TypeHint="UnicodeString"/>
+      <xsd:element name="strFieldParentAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="TComplexTypeChild">
     <xsd:extension base="tns:TComplexTypeParent">
       <xsd:sequence>
-        <xsd:element name="strFieldChild" type="xsd:string"/>
-        <xsd:element name="strFieldChildAtt" type="xsd:string"/>
+        <xsd:element name="strFieldChild" type="xsd:string" wst:TypeHint="UnicodeString"/>
+        <xsd:element name="strFieldChildAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
         <xsd:any maxOccurs="10" minOccurs="2" processContents="skip"/>
       </xsd:sequence>
     </xsd:extension>
diff --git a/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_attribute.xsd b/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_attribute.xsd
index 1512f8ae7..c63b246cd 100644
--- a/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_attribute.xsd
+++ b/wst/trunk/tests/test_suite/files/gen_class_sequence_open_type_any_attribute.xsd
@@ -1,26 +1,26 @@
 <?xml version="1.0"?>
-<schema xmlns:tns="urn:wst-test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
+<schema xmlns:tns="urn:wst-test" xmlns:wst="urn:wst_base" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:wst-test">
   <xsd:complexType name="TComplexType">
     <xsd:anyAttribute processContents="lax"/>
   </xsd:complexType>
   <xsd:complexType name="TComplexType2">
     <xsd:sequence>
-      <xsd:element name="strField" type="xsd:string"/>
-      <xsd:element name="strFieldAtt" type="xsd:string"/>
+      <xsd:element name="strField" type="xsd:string" wst:TypeHint="UnicodeString"/>
+      <xsd:element name="strFieldAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
     </xsd:sequence>
     <xsd:anyAttribute processContents="strict"/>
   </xsd:complexType>
   <xsd:complexType name="TComplexTypeParent">
     <xsd:sequence>
-      <xsd:element name="strFieldParent" type="xsd:string"/>
-      <xsd:element name="strFieldParentAtt" type="xsd:string"/>
+      <xsd:element name="strFieldParent" type="xsd:string" wst:TypeHint="UnicodeString"/>
+      <xsd:element name="strFieldParentAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
     </xsd:sequence>
   </xsd:complexType>
   <xsd:complexType name="TComplexTypeChild">
     <xsd:extension base="tns:TComplexTypeParent">
       <xsd:sequence>
-        <xsd:element name="strFieldChild" type="xsd:string"/>
-        <xsd:element name="strFieldChildAtt" type="xsd:string"/>
+        <xsd:element name="strFieldChild" type="xsd:string" wst:TypeHint="UnicodeString"/>
+        <xsd:element name="strFieldChildAtt" type="xsd:string" wst:TypeHint="UnicodeString"/>
       </xsd:sequence>
     </xsd:extension>
     <xsd:anyAttribute processContents="skip"/>
diff --git a/wst/trunk/tests/test_suite/test_parsers.pas b/wst/trunk/tests/test_suite/test_parsers.pas
index 751432601..a83f120cf 100644
--- a/wst/trunk/tests/test_suite/test_parsers.pas
+++ b/wst/trunk/tests/test_suite/test_parsers.pas
@@ -23,6 +23,13 @@ uses
 {$ENDIF}
   pastree, pascal_parser_intf, xsd_parser, wsdl_parser, test_suite_utils, wst_types;
 
+const
+  STRING_TYPE_NAME =
+    {$IFDEF WST_UNICODESTRING}
+        'UnicodeString';
+    {$ELSE WST_UNICODESTRING}
+        'string';
+    {$ENDIF WST_UNICODESTRING}
 type
 
   { TTest_CustomXsdParser }
@@ -787,7 +794,7 @@ begin
       CheckIs(elt,TPasClassType);
       clsType := elt as TPasClassType;
         CheckNotNull(clsType.AncestorType,'AncestorType is null');
-        CheckSame(tr.FindElementNS('TComplexStringContentRemotable',sXSD_NS),clsType.AncestorType,clsType.AncestorType.Name);
+        CheckSame(tr.FindElementNS('TComplexUnicodeStringContentRemotable',sXSD_NS),clsType.AncestorType,clsType.AncestorType.Name);
 
         prpLs.Clear();
         for i := 0 to Pred(clsType.Members.Count) do begin
@@ -2256,8 +2263,8 @@ begin
       CheckNotNull(elt,s_class_name);       
       CheckIs(elt,TPasClassType);
       clsType := elt as TPasClassType;
-      CheckProperty('one_prop','one-prop','string',ptField);
-      CheckProperty('one_two_prop','one-two-prop','string',ptAttribute);
+      CheckProperty('one_prop','one-prop',STRING_TYPE_NAME,ptField);
+      CheckProperty('one_two_prop','one-two-prop',STRING_TYPE_NAME,ptAttribute);
   finally
     tr.Free();
   end;   
@@ -2490,7 +2497,7 @@ begin
       CheckEquals(x_targetNamespace,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'Date.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement('String');
       CheckNotNull(elt,'String');
@@ -2498,7 +2505,7 @@ begin
       CheckEquals(x_targetNamespace,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'String.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement('Boolean');
       CheckNotNull(elt,'Boolean');
@@ -2506,7 +2513,7 @@ begin
       CheckEquals(x_targetNamespace,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'Boolean.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement(x_complexType_SampleClassType);
       CheckNotNull(elt,x_complexType_SampleClassType);
@@ -2579,7 +2586,7 @@ begin
       CheckEquals(x_targetNamespace,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'SampleType.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement('SAMPLETYPE');
       CheckNotNull(elt,'SAMPLETYPE');
@@ -2587,7 +2594,7 @@ begin
       CheckEquals(x_targetNamespace,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'SAMPLETYPE.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement(x_complexType_SampleClassType);
       CheckNotNull(elt,x_complexType_SampleClassType);
@@ -2655,7 +2662,7 @@ begin
       CheckEquals('urn:wst-test',tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'SampleType.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement('SAMPLETYPE');
       CheckNotNull(elt,'SAMPLETYPE');
@@ -2663,7 +2670,7 @@ begin
       CheckEquals('urn:wst-test',tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'SAMPLETYPE.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     //-----------------------------------------
     mdl := tr.FindModule(CONST_NS);
@@ -2679,7 +2686,7 @@ begin
       CheckEquals(CONST_NS,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'TypeA.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement('TYPEA');
       CheckNotNull(elt,'TYPEA');
@@ -2687,7 +2694,7 @@ begin
       CheckEquals(CONST_NS,tr.GetNameSpace(elt as TPasType));
       CheckIs(elt,TPasAliasType);
       CheckNotNull(TPasAliasType(elt).DestType,'TYPEA.DestType');
-      CheckEquals('string',TPasAliasType(elt).DestType.Name);
+      CheckEquals(STRING_TYPE_NAME,TPasAliasType(elt).DestType.Name);
 
     elt := tr.FindElement('CompoundType');
       CheckNotNull(elt,'CompoundType');
@@ -3192,7 +3199,7 @@ begin
     arg := TPasArgument(mthType.Args[0]);
       CheckNotNull(arg);
       CheckEquals(LowerCase('AConstParam'), LowerCase(arg.Name));
-      CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+      CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
     arg := TPasArgument(mthType.Args[1]);
       CheckNotNull(arg);
       CheckEquals(LowerCase('AOutParam'), LowerCase(arg.Name));
@@ -3245,7 +3252,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AConstParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AOutParam'), LowerCase(arg.Name));
@@ -3258,7 +3265,7 @@ begin
       CheckIs(mthType,TPasFunctionType);
         res := TPasFunctionType(mthType).ResultEl;
         CheckNotNull(res, 'Result');
-        CheckEquals(LowerCase('string'), LowerCase(res.ResultType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(res.ResultType.Name));
       CheckEquals(2, mthType.Args.Count, 'Parameter count');
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
@@ -3281,7 +3288,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AConstParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AOutParam'), LowerCase(arg.Name));
@@ -3334,7 +3341,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AConstParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AOutParam'), LowerCase(arg.Name));
@@ -3347,7 +3354,7 @@ begin
       CheckIs(mthType,TPasFunctionType);
         res := TPasFunctionType(mthType).ResultEl;
         CheckNotNull(res, 'Result');
-        CheckEquals(LowerCase('string'), LowerCase(res.ResultType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(res.ResultType.Name));
       CheckEquals(2, mthType.Args.Count, 'Parameter count');
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
@@ -3370,7 +3377,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AConstParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AOutParam'), LowerCase(arg.Name));
@@ -3479,7 +3486,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AInParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AInOutParam'), LowerCase(arg.Name));
@@ -3498,7 +3505,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AInParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AInOutParam'), LowerCase(arg.Name));
@@ -3549,7 +3556,7 @@ begin
       arg := TPasArgument(mthType.Args[0]);
         CheckNotNull(arg);
         CheckEquals(LowerCase('AConstParam'), LowerCase(arg.Name));
-        CheckEquals(LowerCase('string'), LowerCase(arg.ArgType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(arg.ArgType.Name));
         CheckEquals('argConst',GetEnumName(TypeInfo(TArgumentAccess),Ord(arg.Access)),'AConstParam');
       arg := TPasArgument(mthType.Args[1]);
         CheckNotNull(arg);
@@ -3663,7 +3670,7 @@ begin
         CheckEquals('one-two-param',tr.GetExternalName(arg),'Param External Name');
       res := TPasFunctionType(mthType).ResultEl;
         CheckNotNull(res, 'Result');
-        CheckEquals(LowerCase('string'), LowerCase(res.ResultType.Name));
+        CheckEquals(LowerCase(STRING_TYPE_NAME), LowerCase(res.ResultType.Name));
   finally
     tr.Free();
   end;