diff --git a/content/resources/xsd/core-extensions-1.2.0-rc-6.xsd b/content/resources/xsd/core-extensions-1.2.0-rc-6.xsd
index acd32b819e..404fab6e3c 100644
--- a/content/resources/xsd/core-extensions-1.2.0-rc-6.xsd
+++ b/content/resources/xsd/core-extensions-1.2.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/EXTENSIONS/1.2.0" targetNamespace="http://maven.apache.org/EXTENSIONS/1.2.0">
@@ -46,19 +46,19 @@
       <xs:documentation source="description">Describes a build extension to utilise.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The group ID of the extension&apos;s artifact.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The artifact ID of the extension.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="version" type="xs:string">
+      <xs:element name="version" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The version of the extension.</xs:documentation>
diff --git a/content/resources/xsd/lifecycle-2.0.0-rc-6.xsd b/content/resources/xsd/lifecycle-2.0.0-rc-6.xsd
index 0f098db538..8ab83e9ee4 100644
--- a/content/resources/xsd/lifecycle-2.0.0-rc-6.xsd
+++ b/content/resources/xsd/lifecycle-2.0.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/LIFECYCLE/2.0.0" targetNamespace="http://maven.apache.org/LIFECYCLE/2.0.0">
@@ -45,7 +45,7 @@
       <xs:documentation source="description">A custom lifecycle mapping definition.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="id" type="xs:string">
+      <xs:element name="id" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The ID of this lifecycle, for identification in the mojo descriptor.</xs:documentation>
@@ -70,7 +70,7 @@
       <xs:documentation source="description">A phase mapping definition.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="id" type="xs:string">
+      <xs:element name="id" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The ID of this phase, e.g., {@code generate-sources}.</xs:documentation>
diff --git a/content/resources/xsd/maven-4.1.0-rc-6.xsd b/content/resources/xsd/maven-4.1.0-rc-6.xsd
index 0f8302dfd8..7a8c8ad1be 100644
--- a/content/resources/xsd/maven-4.1.0-rc-6.xsd
+++ b/content/resources/xsd/maven-4.1.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/POM/4.1.0" targetNamespace="http://maven.apache.org/POM/4.1.0">
@@ -38,7 +38,7 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="modelVersion" type="xs:string">
+      <xs:element name="modelVersion" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">Declares to which version of project descriptor this POM conforms to:
@@ -53,7 +53,7 @@
             is given as a group ID, artifact ID and version.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -63,7 +63,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">The identifier for this artifact that is unique within the group given by the
@@ -72,7 +72,7 @@
             distributions, and WARs.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="version" type="xs:string">
+      <xs:element name="version" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The current version of the artifact produced by this project.</xs:documentation>
@@ -92,7 +92,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="name" type="xs:string">
+      <xs:element name="name" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">The full name of the project.</xs:documentation>
@@ -120,7 +120,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="inceptionYear" type="xs:string">
+      <xs:element name="inceptionYear" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">The year of the project&apos;s inception, specified with 4 digits. This value is
@@ -314,7 +314,7 @@
           </xs:sequence>
         </xs:complexType>
       </xs:element>
-      <xs:element minOccurs="0" name="build" type="Build">
+      <xs:element name="build" type="Build">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">Information required to build the project.</xs:documentation>
@@ -678,7 +678,7 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -689,7 +689,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -814,13 +814,13 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The group ID of the project to exclude.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The artifact ID of the project to exclude.</xs:documentation>
@@ -840,13 +840,13 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The group id of the parent project to inherit from.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The artifact id of the parent project to inherit from.</xs:documentation>
@@ -1212,7 +1212,7 @@
           <xs:documentation source="description">How to handle downloading of snapshots from this repository.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string">
+      <xs:element name="id" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -1228,7 +1228,7 @@
           <xs:documentation source="description">Human readable name of the repository.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="url" type="xs:string">
+      <xs:element name="url" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -1419,13 +1419,13 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="groupId" type="xs:string" default="org.apache.maven.plugins">
+      <xs:element name="groupId" type="xs:string" default="org.apache.maven.plugins">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The group ID of the reporting plugin in the repository.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The artifact ID of the reporting plugin in the repository.</xs:documentation>
@@ -1498,7 +1498,7 @@
       <xs:documentation source="description">Represents a set of reports and configuration to be used to generate them.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">0.0.0+</xs:documentation>
           <xs:documentation source="description">The unique id for this report set, to be used during POM inheritance and profile injection
@@ -1506,7 +1506,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="reports">
+      <xs:element name="reports">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The list of reports from this plugin which should be generated from this set.</xs:documentation>
@@ -1562,7 +1562,7 @@
         parameters or command line arguments.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The identifier of this build profile. This is used for command line
@@ -1577,7 +1577,7 @@
             profile.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="build" type="BuildBase">
+      <xs:element name="build" type="BuildBase">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">Information required to build the project.</xs:documentation>
@@ -1836,7 +1836,7 @@
         does a case-sensitive match against the property value as well.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="name" type="xs:string">
+      <xs:element name="name" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The name of the property to be used to activate a profile.</xs:documentation>
@@ -1937,7 +1937,7 @@
           <xs:documentation source="description">How to handle downloading of snapshots from this repository.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string">
+      <xs:element name="id" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -1953,7 +1953,7 @@
           <xs:documentation source="description">Human readable name of the repository.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="url" type="xs:string">
+      <xs:element name="url" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -2088,7 +2088,7 @@
           <xs:documentation source="description">The group ID of the plugin in the repository.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The artifact ID of the plugin in the repository.</xs:documentation>
@@ -2380,7 +2380,7 @@
           </xs:sequence>
         </xs:complexType>
       </xs:element>
-      <xs:element minOccurs="0" name="sourceDirectory" type="xs:string">
+      <xs:element name="sourceDirectory" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">3.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -2393,7 +2393,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="scriptSourceDirectory" type="xs:string">
+      <xs:element name="scriptSourceDirectory" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -2407,7 +2407,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="testSourceDirectory" type="xs:string">
+      <xs:element name="testSourceDirectory" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -2763,13 +2763,13 @@
       <xs:documentation source="description">Describes a build extension to utilise.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The group ID of the extension&apos;s artifact.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">4.0.0+</xs:documentation>
           <xs:documentation source="description">The artifact ID of the extension.</xs:documentation>
diff --git a/content/resources/xsd/plugin-2.0.0-rc-6.xsd b/content/resources/xsd/plugin-2.0.0-rc-6.xsd
index a29a7604f7..e515db33b7 100644
--- a/content/resources/xsd/plugin-2.0.0-rc-6.xsd
+++ b/content/resources/xsd/plugin-2.0.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/PLUGIN/2.0.0" targetNamespace="http://maven.apache.org/PLUGIN/2.0.0">
@@ -44,7 +44,7 @@
           <xs:documentation source="description">Description of the plugin.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="groupId" type="xs:string">
+      <xs:element name="groupId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The group id of the plugin.</xs:documentation>
@@ -56,7 +56,7 @@
           <xs:documentation source="description">The artifact id of the plugin.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="version" type="xs:string">
+      <xs:element name="version" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The version of the plugin.</xs:documentation>
@@ -117,7 +117,7 @@
       <xs:documentation source="description">A Mojo description.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="goal" type="xs:string">
+      <xs:element name="goal" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -298,7 +298,7 @@
       <xs:documentation source="description">A parameter description.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="name" type="xs:string">
+      <xs:element name="name" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -317,7 +317,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="type" type="xs:string">
+      <xs:element name="type" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
diff --git a/content/resources/xsd/repository-metadata-1.2.0-rc-6.xsd b/content/resources/xsd/repository-metadata-1.2.0-rc-6.xsd
index f07cb15aa5..2f984040b8 100644
--- a/content/resources/xsd/repository-metadata-1.2.0-rc-6.xsd
+++ b/content/resources/xsd/repository-metadata-1.2.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/METADATA/1.2.0" targetNamespace="http://maven.apache.org/METADATA/1.2.0">
@@ -79,19 +79,19 @@
       <xs:documentation source="description">Mapping information for a single plugin within this group.</xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="name" type="xs:string">
+      <xs:element name="name" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">Display name for the plugin.</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="prefix" type="xs:string">
+      <xs:element name="prefix" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The plugin invocation prefix (i.e. eclipse for eclipse:eclipse)</xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="artifactId" type="xs:string">
+      <xs:element name="artifactId" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The plugin artifactId</xs:documentation>
diff --git a/content/resources/xsd/settings-2.0.0-rc-6.xsd b/content/resources/xsd/settings-2.0.0-rc-6.xsd
index cb7ecc68de..ddb1f021d0 100644
--- a/content/resources/xsd/settings-2.0.0-rc-6.xsd
+++ b/content/resources/xsd/settings-2.0.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/SETTINGS/2.0.0" targetNamespace="http://maven.apache.org/SETTINGS/2.0.0">
@@ -36,7 +36,7 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="localRepository" type="xs:string">
+      <xs:element name="localRepository" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -237,7 +237,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="host" type="xs:string">
+      <xs:element name="host" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -253,7 +253,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">Item identifier.</xs:documentation>
@@ -330,7 +330,7 @@
           </xs:sequence>
         </xs:complexType>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">Item identifier.</xs:documentation>
@@ -346,7 +346,7 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="mirrorOf" type="xs:string">
+      <xs:element name="mirrorOf" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
@@ -367,7 +367,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="url" type="xs:string">
+      <xs:element name="url" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">The URL of the mirror repository.</xs:documentation>
@@ -402,7 +402,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">Item identifier.</xs:documentation>
@@ -460,7 +460,7 @@
           </xs:documentation>
         </xs:annotation>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">Item identifier.</xs:documentation>
@@ -560,7 +560,7 @@
           </xs:sequence>
         </xs:complexType>
       </xs:element>
-      <xs:element minOccurs="0" name="id" type="xs:string" default="default">
+      <xs:element name="id" type="xs:string" default="default">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">Item identifier.</xs:documentation>
@@ -688,7 +688,7 @@
       </xs:documentation>
     </xs:annotation>
     <xs:all>
-      <xs:element minOccurs="0" name="name" type="xs:string">
+      <xs:element name="name" type="xs:string">
         <xs:annotation>
           <xs:documentation source="version">1.0.0+</xs:documentation>
           <xs:documentation source="description">
diff --git a/content/resources/xsd/toolchains-1.2.0-rc-6.xsd b/content/resources/xsd/toolchains-1.2.0-rc-6.xsd
index 990ea50724..dbff467ac8 100644
--- a/content/resources/xsd/toolchains-1.2.0-rc-6.xsd
+++ b/content/resources/xsd/toolchains-1.2.0-rc-6.xsd
@@ -16,7 +16,7 @@
 <!-- specific language governing permissions and limitations                -->
 <!-- under the License.                                                     -->
 <!-- =================== DO NOT EDIT THIS FILE ====================         -->
-<!-- Generated by Modello 2.5.1,                                            -->
+<!-- Generated by Modello 2.7.0,                                            -->
 <!-- any modifications will be overwritten.                                 -->
 <!-- ==============================================================         -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns="http://maven.apache.org/TOOLCHAINS/1.2.0" targetNamespace="http://maven.apache.org/TOOLCHAINS/1.2.0">