diff --git a/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070502_derivation_by_list/Pos_070502_derivation_by_list_005/Pos_070502_derivation_by_list_005.ttcn b/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070502_derivation_by_list/Pos_070502_derivation_by_list_005/Pos_070502_derivation_by_list_005.ttcn
index d8b508a1ad69fe46343288be2672340c3faacbb0..a71dcc0ab7cf0e57501f194870f166ece7a57765 100644
--- a/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070502_derivation_by_list/Pos_070502_derivation_by_list_005/Pos_070502_derivation_by_list_005.ttcn
+++ b/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070502_derivation_by_list/Pos_070502_derivation_by_list_005/Pos_070502_derivation_by_list_005.ttcn
@@ -43,7 +43,7 @@ module Pos_070502_derivation_by_list_005 {
     testcase TC_Pos_070502_derivation_by_list_005() runs on C system C {
         var Raw v_rcv;
 
-        var Raw  v_Raw:="<ns150:MyType xmlns:ns150='schema:Pos_070502_derivation_by_list_005'>true 2.000000 false</ns150:MyType>\n\n";
+        var Raw  v_Raw:="<ns150:MyType xmlns:ns150='schema:Pos_070502_derivation_by_list_005' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>true 2.000000 false</ns150:MyType>\n\n";
 
         connect(self:p, self:p1);
 
diff --git a/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_001/Pos_070503_derivation_by_union_001.ttcn b/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_001/Pos_070503_derivation_by_union_001.ttcn
index 276bd70d5d48cfb9ddadec5fc368c548e39b8d3e..0a3a6515ea16feef8bc8cbd0150dd30b23d6fcbf 100644
--- a/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_001/Pos_070503_derivation_by_union_001.ttcn
+++ b/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_001/Pos_070503_derivation_by_union_001.ttcn
@@ -52,7 +52,7 @@ module Pos_070503_derivation_by_union_001 {
     testcase TC_Pos_070503_derivation_by_union_001() runs on C system C {
         var Raw v_rcv;
 
-        var Raw  v_Raw:="<ns151:MyType xmlns:ns151='schema:Pos_070503_derivation_by_union_001' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:type='ns151:integer'>5</ns151:MyType>\n\n";
+        var Raw  v_Raw:="<ns151:MyType xmlns:ns151='schema:Pos_070503_derivation_by_union_001' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xsi:type='xsd:integer'>5</ns151:MyType>\n\n";
 
         connect(self:p, self:p1);
 
diff --git a/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_005/Pos_070503_derivation_by_union_005.ttcn b/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_005/Pos_070503_derivation_by_union_005.ttcn
index 9aa20ee5db21f59ab9b8cdbfd36883d6e9f8e98f..ca2a6a428465295bbe171bda87b6a9ecd87bc1bc 100644
--- a/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_005/Pos_070503_derivation_by_union_005.ttcn
+++ b/conformance_test/xml_tests/positive_tests/ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_005/Pos_070503_derivation_by_union_005.ttcn
@@ -43,7 +43,7 @@ module Pos_070503_derivation_by_union_005 {
     testcase TC_Pos_070503_derivation_by_union_005() runs on C system C {
         var Raw v_rcv;
 
-        var Raw  v_Raw:="<ns155:MyType xmlns:ns155='schema:Pos_070503_derivation_by_union_005'>small</ns155:MyType>\n\n";
+        var Raw  v_Raw:="<ns155:MyType xmlns:ns155='schema:Pos_070503_derivation_by_union_005' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xsi:type='xsd:string'>small</ns155:MyType>\n\n";
 
         connect(self:p, self:p1);
 
diff --git a/conformance_test/xml_tests/positive_tests/XML_tests.cfg b/conformance_test/xml_tests/positive_tests/XML_tests.cfg
index aa8eb7cf1fc0660fbe0e0b22df2be55d279a7d14..3abc1b64db8063e58ded7f9370702c38d72c01b5 100644
--- a/conformance_test/xml_tests/positive_tests/XML_tests.cfg
+++ b/conformance_test/xml_tests/positive_tests/XML_tests.cfg
@@ -155,6 +155,8 @@ Pos_070502_derivation_by_list_002.control
 Pos_070502_derivation_by_list_004.control
 Pos_070502_derivation_by_list_005.control
 Pos_070503_derivation_by_union_001.control
+Pos_070503_derivation_by_union_002.control
+Pos_070503_derivation_by_union_003.control
 Pos_070503_derivation_by_union_004.control
 Pos_070503_derivation_by_union_005.control
 Pos_070503_derivation_by_union_006.control
diff --git a/conformance_test/xml_tests/positive_tests/XML_tests.tpd b/conformance_test/xml_tests/positive_tests/XML_tests.tpd
index 772f2d972078c16fdac2be531caa12f2bbe97307..cf5f5b909bd542a91f8232479f900d280b5ae220 100644
--- a/conformance_test/xml_tests/positive_tests/XML_tests.tpd
+++ b/conformance_test/xml_tests/positive_tests/XML_tests.tpd
@@ -871,10 +871,10 @@
 	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070502_derivation_by_list_005.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070502_derivation_by_list_005.ttcn"/>
 	<FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_001/Pos_070503_derivation_by_union_001.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_001/Pos_070503_derivation_by_union_001.ttcn"/>
 	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_001.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_001.ttcn"/>
-<!-- <FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_002/Pos_070503_derivation_by_union_002.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_002/Pos_070503_derivation_by_union_002.ttcn"/>
-	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_002.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_002.ttcn"/> -->
-<!-- 	<FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_003/Pos_070503_derivation_by_union_003.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_003/Pos_070503_derivation_by_union_003.ttcn"/>
-	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_003.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_003.ttcn"/>-->
+ <FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_002/Pos_070503_derivation_by_union_002.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_002/Pos_070503_derivation_by_union_002.ttcn"/>
+	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_002.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_002.ttcn"/> 
+ 	<FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_003/Pos_070503_derivation_by_union_003.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_003/Pos_070503_derivation_by_union_003.ttcn"/>
+	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_003.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_003.ttcn"/>
 	<FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_004/Pos_070503_derivation_by_union_004.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_004/Pos_070503_derivation_by_union_004.ttcn"/>
 	<FileResource projectRelativePath="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_004.ttcn" relativeURI="ATS/xsd_converted/schema_Pos_070503_derivation_by_union_004.ttcn"/>
 	<FileResource projectRelativePath="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_005/Pos_070503_derivation_by_union_005.ttcn" relativeURI="ATS/07_mapping_xsd_components/0705_simpletype_components/070503_derivation_by_union/Pos_070503_derivation_by_union_005/Pos_070503_derivation_by_union_005.ttcn"/>
diff --git a/usrguide/SoC_XML_TITAN.docx b/usrguide/SoC_XML_TITAN.docx
index 6690795f68bf8a011db67cdb5ee8a219a30b23d2..4972556e5fb03995d39c1602c4781622668c55b3 100644
Binary files a/usrguide/SoC_XML_TITAN.docx and b/usrguide/SoC_XML_TITAN.docx differ