diff --git a/gradle.properties b/gradle.properties
index 5d78ecf..724765f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
-version = 1.1.0
-relVersion = 1.1.0
+version = 1.2.0
+relVersion = 1.2.0
diff --git a/src/data/manifest.xml b/src/data/manifest.xml
index 3d70039..d241911 100644
--- a/src/data/manifest.xml
+++ b/src/data/manifest.xml
@@ -123,10 +123,10 @@
     <purpose>http://www.rddl.org/purposes#validation</purpose>
     <nature>http://www.w3.org/2001/XMLSchema</nature>
   </entry>
-  <entry uri="root/www.w3.org/2001/datatypes.xsd">
+  <entry uri="root/www.w3.org/2001/datatypes.dtd">
     <public>-//W3C//DTD XSD 1.0 Datatypes//EN</public>
     <public>datatypes</public>
-    <system>https://www.w3.org/2001/datatypes.xsd</system>
+    <system>https://www.w3.org/2001/datatypes.dtd</system>
   </entry>
   <entry uri="root/www.w3.org/2001/xml.xsd">
     <uri>https://www.w3.org/2001/xml.xsd</uri>
@@ -349,10 +349,14 @@
   <entry uri="root/www.w3.org/2009/XMLSchema/XMLSchema.dtd">
     <public>-//W3C//DTD XSD 1.1//EN</public>
     <system>https://www.w3.org/2009/XMLSchema/XMLSchema.dtd</system>
+    <system>https://www.w3.org/TR/xmlschema11-1/XMLSchema.dtd</system>
+    <system>https://www.w3.org/TR/xmlschema11-2/XMLSchema.dtd</system>
   </entry>
-  <entry uri="root/www.w3.org/2009/XMLSchema/datatypes.xsd">
+  <entry uri="root/www.w3.org/2009/XMLSchema/datatypes.dtd">
     <public>-//W3C//DTD XSD 1.1 Datatypes//EN</public>
-    <system>https://www.w3.org/2009/XMLSchema/datatypes.xsd</system>
+    <system>https://www.w3.org/2009/XMLSchema/datatypes.dtd</system>
+    <system>https://www.w3.org/TR/xmlschema11-1/datatypes.dtd</system>
+    <system>https://www.w3.org/TR/xmlschema11-2/datatypes.dtd</system>
   </entry>
   <entry uri="root/www.w3.org/Graphics/SVG/1.1/DTD/svg-animation.mod">
     <public>-//W3C//ELEMENTS SVG 1.1 Animation//EN</public>
diff --git a/src/data/www.w3.org/2001/datatypes.xsd b/src/data/www.w3.org/2001/datatypes.dtd
similarity index 100%
rename from src/data/www.w3.org/2001/datatypes.xsd
rename to src/data/www.w3.org/2001/datatypes.dtd
diff --git a/src/data/www.w3.org/2009/XMLSchema/datatypes.xsd b/src/data/www.w3.org/2009/XMLSchema/datatypes.dtd
similarity index 100%
rename from src/data/www.w3.org/2009/XMLSchema/datatypes.xsd
rename to src/data/www.w3.org/2009/XMLSchema/datatypes.dtd
diff --git a/src/data/www.w3.org/TR/xmlschema-2/datatypes.xsd b/src/data/www.w3.org/TR/xmlschema-2/datatypes.xsd
index 1501c3a..48ba474 100644
--- a/src/data/www.w3.org/TR/xmlschema-2/datatypes.xsd
+++ b/src/data/www.w3.org/TR/xmlschema-2/datatypes.xsd
@@ -35,7 +35,6 @@
         <!ATTLIST xs:union id ID #IMPLIED>
         ]>
 
-<?xml version='1.0'?>
 <xs:schema xmlns:hfp="http://www.w3.org/2001/XMLSchema-hasFacetAndProperty"
            xmlns:xs="http://www.w3.org/2001/XMLSchema" blockDefault="#all"
            elementFormDefault="qualified" xml:lang="en"
@@ -1114,4 +1113,3 @@
     </xs:complexType>
   </xs:element>
 </xs:schema>
-