diff --git a/hibernate-core/src/main/java/org/hibernate/boot/jaxb/mapping/marshall/CollectionClassificationMarshalling.java b/hibernate-core/src/main/java/org/hibernate/boot/jaxb/mapping/marshall/CollectionClassificationMarshalling.java
deleted file mode 100644
index ecf25b7c49..0000000000
--- a/hibernate-core/src/main/java/org/hibernate/boot/jaxb/mapping/marshall/CollectionClassificationMarshalling.java
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Hibernate, Relational Persistence for Idiomatic Java
- *
- * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
- * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html.
- */
-package org.hibernate.boot.jaxb.mapping.marshall;
-
-import org.hibernate.metamodel.CollectionClassification;
-
-/**
- * JAXB marshalling for {@link CollectionClassification}
- *
- * @author Steve Ebersole
- */
-public class CollectionClassificationMarshalling {
-	public static CollectionClassification fromXml(String name) {
-		return CollectionClassification.interpretSetting( name.replace( '-', '_' ) );
-	}
-
-	public static String toXml(CollectionClassification classification) {
-		return classification.name().replace( '_', '-' );
-	}
-}
diff --git a/hibernate-core/src/main/java/org/hibernate/boot/model/internal/JPAXMLOverriddenMetadataProvider.java b/hibernate-core/src/main/java/org/hibernate/boot/model/internal/JPAXMLOverriddenMetadataProvider.java
index 7903e608b2..816ab3517d 100644
--- a/hibernate-core/src/main/java/org/hibernate/boot/model/internal/JPAXMLOverriddenMetadataProvider.java
+++ b/hibernate-core/src/main/java/org/hibernate/boot/model/internal/JPAXMLOverriddenMetadataProvider.java
@@ -112,7 +112,7 @@ public class JPAXMLOverriddenMetadataProvider implements MetadataProvider {
 				}
 				defaults.put( EntityListeners.class, entityListeners );
 				for ( JaxbEntityMappings entityMappings : xmlContext.getAllDocuments() ) {
-					List<JaxbSequenceGenerator> jaxbSequenceGenerators = entityMappings.getSequenceGenerators();
+					List<JaxbSequenceGenerator> jaxbSequenceGenerators = entityMappings.getSequenceGenerator();
 					List<SequenceGenerator> sequenceGenerators = (List<SequenceGenerator>) defaults.get( SequenceGenerator.class );
 					if ( sequenceGenerators == null ) {
 						sequenceGenerators = new ArrayList<>();
@@ -122,7 +122,7 @@ public class JPAXMLOverriddenMetadataProvider implements MetadataProvider {
 						sequenceGenerators.add( JPAXMLOverriddenAnnotationReader.buildSequenceGeneratorAnnotation( element ) );
 					}
 
-					List<JaxbTableGenerator> jaxbTableGenerators = entityMappings.getTableGenerators();
+					List<JaxbTableGenerator> jaxbTableGenerators = entityMappings.getTableGenerator();
 					List<TableGenerator> tableGenerators = (List<TableGenerator>) defaults.get( TableGenerator.class );
 					if ( tableGenerators == null ) {
 						tableGenerators = new ArrayList<>();
diff --git a/hibernate-core/src/main/java/org/hibernate/internal/util/StringHelper.java b/hibernate-core/src/main/java/org/hibernate/internal/util/StringHelper.java
index a3b39499b0..18d672fa32 100644
--- a/hibernate-core/src/main/java/org/hibernate/internal/util/StringHelper.java
+++ b/hibernate-core/src/main/java/org/hibernate/internal/util/StringHelper.java
@@ -584,25 +584,6 @@ public final class StringHelper {
 		return isEmpty( prefix ) ? name : prefix + '.' + name;
 	}
 
-	/**
-	 * Qualifies {@code name} with {@code prefix} separated by a '.' if<ul>
-	 *     <li>{@code name} is not already qualified</li>
-	 *     <li>{@code prefix} is not null</li>
-	 * </ul>
-	 *
-	 * @apiNote Similar to {@link #qualifyConditionally}, except that here we explicitly
-	 * check whether {@code name} is already qualified.
-	 */
-	public static String qualifyConditionallyIfNot(String prefix, String name) {
-		if ( name == null ) {
-			throw new NullPointerException( "name was null attempting to build qualified name" );
-		}
-		if ( name.indexOf( '.' ) > 0 || isEmpty( prefix ) ) {
-			return name;
-		}
-		return prefix + '.' + name;
-	}
-
 	public static String[] qualify(String prefix, String[] names) {
 		if ( prefix == null ) {
 			return names;
diff --git a/hibernate-core/src/main/resources/org/hibernate/xsd/mapping/mapping-3.1.0.xsd b/hibernate-core/src/main/resources/org/hibernate/xsd/mapping/mapping-3.1.0.xsd
index 6af69908c9..2613a73b4b 100644
--- a/hibernate-core/src/main/resources/org/hibernate/xsd/mapping/mapping-3.1.0.xsd
+++ b/hibernate-core/src/main/resources/org/hibernate/xsd/mapping/mapping-3.1.0.xsd
@@ -87,15 +87,10 @@
                 <!-- hbm : whether entities should be lazy (by default) or not -->
                 <xsd:element name="default-lazy" type="xsd:boolean" minOccurs="0" />
 
-                <xsd:element name="java-type" type="orm:java-type-registration" minOccurs="0" maxOccurs="unbounded" />
-                <xsd:element name="jdbc-type" type="orm:jdbc-type-registration" minOccurs="0" maxOccurs="unbounded" />
-                <xsd:element name="user-type" type="orm:user-type-registration" minOccurs="0" maxOccurs="unbounded" />
-                <xsd:element name="composite-user-type" type="orm:composite-user-type-registration" minOccurs="0" maxOccurs="unbounded" />
-                <xsd:element name="collection-user-type" type="orm:collection-user-type-registration" minOccurs="0" maxOccurs="unbounded" />
-                <xsd:element name="conversion" type="orm:converter-registration" minOccurs="0" maxOccurs="unbounded" />
-
-                <xsd:element name="embeddable-instantiator" type="orm:embeddable-instantiator-registration" minOccurs="0" maxOccurs="unbounded" />
-
+                <!-- hbm: <type-def/> definitions -->
+                <!-- hbm: disabled for now to see if we can move away from String-base type mappings in XML also -->
+                <!-- <xsd:element name="type-def" type="orm:hbm-type-def" minOccurs="0" maxOccurs="unbounded" /> -->
+                <!-- hbm: Definitions of filer -->
                 <xsd:element name="filter-def" type="orm:filter-def" minOccurs="0" maxOccurs="unbounded" />
                 <xsd:element name="fetch-profile" type="orm:fetch-profile" minOccurs="0" maxOccurs="unbounded" />
 
@@ -159,110 +154,6 @@
         <xsd:attribute name="maximumVersion" type="xsd:string"/>
     </xsd:complexType>
 
-    <xsd:complexType name="java-type-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @JavaTypeRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="class" use="required" type="xsd:string"/>
-        <xsd:attribute name="descriptor" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
-    <xsd:complexType name="jdbc-type-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @JdbcTypeRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="code" type="xsd:int"/>
-        <xsd:attribute name="descriptor" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
-    <xsd:complexType name="user-type-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @TypeRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="class" use="required" type="xsd:string"/>
-        <xsd:attribute name="descriptor" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
-    <xsd:complexType name="composite-user-type-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @CompositeTypeRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="class" use="required" type="xsd:string"/>
-        <xsd:attribute name="descriptor" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
-    <xsd:complexType name="collection-user-type-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @CollectionTypeRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:sequence>
-            <xsd:element name="param" minOccurs="0" maxOccurs="unbounded" type="configuration-parameter"/>
-        </xsd:sequence>
-        <xsd:attribute name="classification" use="required" type="orm:collection-classifications"/>
-        <xsd:attribute name="descriptor" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
-    <xsd:complexType name="configuration-parameter">
-        <xsd:annotation>
-            <xsd:documentation>
-                Configuration parameter user-types
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="name" use="required" type="xsd:string"/>
-        <xsd:attribute name="value" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
-    <xsd:simpleType name="collection-classifications">
-        <xsd:annotation>
-            <xsd:documentation>
-                See `@org.hibernate.metamodel.CollectionClassification`
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:restriction base="xsd:token">
-            <xsd:enumeration value="array"/>
-            <xsd:enumeration value="bag"/>
-            <xsd:enumeration value="id-bag"/>
-            <xsd:enumeration value="list"/>
-            <xsd:enumeration value="set"/>
-            <xsd:enumeration value="sorted-set"/>
-            <xsd:enumeration value="ordered-set"/>
-            <xsd:enumeration value="map"/>
-            <xsd:enumeration value="sorted-map"/>
-            <xsd:enumeration value="ordered-map"/>
-        </xsd:restriction>
-    </xsd:simpleType>
-
-    <xsd:complexType name="converter-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @ConverterRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="converter" use="required" type="xsd:string"/>
-        <xsd:attribute name="class" type="xsd:string"/>
-        <xsd:attribute name="auto-apply" type="xsd:boolean" default="true"/>
-    </xsd:complexType>
-
-    <xsd:complexType name="embeddable-instantiator-registration">
-        <xsd:annotation>
-            <xsd:documentation>
-                See @EmbeddableInstantiatorRegistration
-            </xsd:documentation>
-        </xsd:annotation>
-        <xsd:attribute name="embeddableClass" use="required" type="xsd:string"/>
-        <xsd:attribute name="instantiator" use="required" type="xsd:string"/>
-    </xsd:complexType>
-
 
     <!-- **************************************************** -->
 
@@ -391,10 +282,10 @@
             <!-- hbm : declare a SQL fragment to append to SELECT queries as a filter for this entity : @Where  -->
             <xsd:element name="where" type="xsd:string" minOccurs="0"/>
 
-            <xsd:element name="loader" type="orm:custom-loader" minOccurs="0"/>
-            <xsd:element name="sql-insert" type="orm:custom-sql" minOccurs="0"/>
-            <xsd:element name="sql-update" type="orm:custom-sql" minOccurs="0"/>
-            <xsd:element name="sql-delete" type="orm:custom-sql" minOccurs="0"/>
+            <xsd:element name="loader" type="orm:custom-loader" minOccurs="0" maxOccurs="1"/>
+            <xsd:element name="sql-insert" type="orm:custom-sql" minOccurs="0" maxOccurs="1"/>
+            <xsd:element name="sql-update" type="orm:custom-sql" minOccurs="0" maxOccurs="1"/>
+            <xsd:element name="sql-delete" type="orm:custom-sql" minOccurs="0" maxOccurs="1"/>
 
             <!-- hbm : should INSERT statements be dynamically generated : @DynamicInsert -->
             <xsd:element name="dynamic-insert" type="xsd:boolean" minOccurs="0"/>
@@ -427,7 +318,7 @@
             <xsd:element name="polymorphism" type="orm:polymorphism-type" default="implicit" minOccurs="0" />
 
             <xsd:element name="discriminator-value" type="orm:discriminator-value" minOccurs="0"/>
-            <xsd:choice minOccurs="0">
+            <xsd:choice minOccurs="0" maxOccurs="1">
                 <xsd:element name="discriminator-column" type="orm:discriminator-column" />
                 <!-- hbm: support for Hibernate formula mapping -->
                 <xsd:element name="discriminator-formula" type="xsd:string" />
@@ -462,7 +353,7 @@
             <xsd:element name="named-entity-graph" type="orm:named-entity-graph" minOccurs="0" maxOccurs="unbounded"/>
 
             <!-- hbm: intended for use when mapping dynamic (MAP) models -->
-            <xsd:element name="extends" type="xsd:string" minOccurs="0"/>
+            <xsd:element name="extends" type="xsd:string" minOccurs="0" maxOccurs="1" />
 
             <xsd:element name="filter" type="orm:hbm-filter" minOccurs="0" maxOccurs="unbounded" />
 
@@ -2231,7 +2122,7 @@
 
     <xsd:simpleType name="versionType">
         <xsd:restriction base="xsd:token">
-            <xsd:pattern value="\d+(\.\d+)*"/>
+            <xsd:pattern value="[0-9]+(\.[0-9]+)*"/>
         </xsd:restriction>
     </xsd:simpleType>
 
@@ -2270,7 +2161,7 @@
                     <xsd:attribute name="type" use="required" type="xsd:string"/>
                 </xsd:complexType>
             </xsd:element>
-            <xsd:element name="condition" type="xsd:string" minOccurs="0"/>
+            <xsd:element name="condition" type="xsd:string" minOccurs="0" maxOccurs="1" />
         </xsd:sequence>
 
         <xsd:attribute name="name" use="required" type="xsd:string"/>
@@ -2590,9 +2481,9 @@
             </xsd:documentation>
         </xsd:annotation>
         <xsd:sequence>
-            <xsd:element name="type" type="xsd:string" minOccurs="0"/>
-            <xsd:element name="column" type="orm:column" minOccurs="0"/>
-            <xsd:element name="mapping" type="orm:hbm-any-discriminator-value-mapping" maxOccurs="unbounded" />
+            <xsd:element name="type" type="xsd:string" minOccurs="0" maxOccurs="1" />
+            <xsd:element name="column" type="orm:column" minOccurs="0" maxOccurs="1" />
+            <xsd:element name="mapping" type="orm:hbm-any-discriminator-value-mapping" minOccurs="1" maxOccurs="unbounded" />
         </xsd:sequence>
     </xsd:complexType>
 
@@ -2603,7 +2494,7 @@
             </xsd:documentation>
         </xsd:annotation>
         <xsd:sequence>
-            <xsd:element name="type" type="xsd:string" minOccurs="0"/>
+            <xsd:element name="type" type="xsd:string" minOccurs="0" maxOccurs="1" />
             <xsd:element name="column" type="orm:column" minOccurs="0" maxOccurs="unbounded" />
         </xsd:sequence>
     </xsd:complexType>
@@ -2814,5 +2705,4 @@
             <xsd:enumeration value="never"/>
         </xsd:restriction>
     </xsd:simpleType>
-
-</xsd:schema>
+</xsd:schema>
\ No newline at end of file
diff --git a/hibernate-core/src/main/xjb/mapping-bindings.xjb b/hibernate-core/src/main/xjb/mapping-bindings.xjb
index 569167aadd..e77f75253e 100644
--- a/hibernate-core/src/main/xjb/mapping-bindings.xjb
+++ b/hibernate-core/src/main/xjb/mapping-bindings.xjb
@@ -29,12 +29,6 @@
             <bindings node=".//xsd:element[@name='identifier-generator']">
 	            <property name="genericGenerators"/>
             </bindings>
-            <bindings node=".//xsd:element[@name='sequence-generator']">
-	            <property name="sequenceGenerators"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='table-generator']">
-	            <property name="tableGenerators"/>
-            </bindings>
             <bindings node=".//xsd:element[@name='database-object']">
 	            <property name="databaseObjects"/>
             </bindings>
@@ -65,33 +59,6 @@
             <bindings node=".//xsd:element[@name='converter']">
 	            <property name="converters"/>
             </bindings>
-            <bindings node=".//xsd:element[@name='java-type']">
-	            <property name="javaTypeRegistrations"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='jdbc-type']">
-	            <property name="jdbcTypeRegistrations"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='user-type']">
-	            <property name="userTypeRegistrations"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='composite-user-type']">
-	            <property name="compositeUserTypeRegistrations"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='collection-user-type']">
-	            <property name="collectionUserTypeRegistrations"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='embeddable-instantiator']">
-	            <property name="embeddableInstantiatorRegistrations"/>
-            </bindings>
-            <bindings node=".//xsd:element[@name='conversion']">
-	            <property name="converterRegistrations"/>
-            </bindings>
-        </bindings>
-
-        <bindings node="//xsd:complexType[@name='collection-user-type-registration']">
-			<bindings node=".//xsd:element[@name='param']">
-				<property name="parameters"/>
-			</bindings>
         </bindings>
 
         <bindings node="//xsd:complexType[@name='entity']">
@@ -417,12 +384,6 @@
 					printMethod="org.hibernate.boot.jaxb.mapping.marshall.ConstraintModeMarshalling.toXml" />
         </bindings>
 
-		<bindings node="//xsd:simpleType[@name='collection-classifications']">
-			<javaType name="org.hibernate.metamodel.CollectionClassification"
-					parseMethod="org.hibernate.boot.jaxb.mapping.marshall.CollectionClassificationMarshalling.fromXml"
-					printMethod="org.hibernate.boot.jaxb.mapping.marshall.CollectionClassificationMarshalling.toXml" />
-        </bindings>
-
     </bindings>
 
 
@@ -431,4 +392,4 @@
 		<serializable />
 	</globalBindings>
 
-</bindings>
+</bindings>
\ No newline at end of file