diff --git a/UPGRADE.md b/UPGRADE.md
index 939e9e7c922..4ed28480638 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -1,5 +1,9 @@
 # Upgrade to 2.10
 
+## BC Break: Removed possibility to extend the doctrine mapping xml schema with anything
+
+If you want to extend it now you have to provide your own validation schema.
+
 ## Minor BC BREAK: some exception methods have been removed
 
 The following methods were not in use and are very unlikely to be used by
diff --git a/doctrine-mapping.xsd b/doctrine-mapping.xsd
index 715f3ff65d0..9485a58104c 100644
--- a/doctrine-mapping.xsd
+++ b/doctrine-mapping.xsd
@@ -18,17 +18,13 @@
         <xs:element name="mapped-superclass" type="orm:mapped-superclass" minOccurs="0" maxOccurs="unbounded" />
         <xs:element name="entity" type="orm:entity" minOccurs="0" maxOccurs="unbounded" />
         <xs:element name="embeddable" type="orm:embeddable" minOccurs="0" maxOccurs="unbounded" />
-        <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
       </xs:choice>
-      <xs:anyAttribute namespace="##other"/>
     </xs:complexType>
   </xs:element>
 
   <xs:complexType name="emptyType">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="cascade-type">
@@ -39,9 +35,7 @@
       <xs:element name="cascade-remove" type="orm:emptyType" minOccurs="0"/>
       <xs:element name="cascade-refresh" type="orm:emptyType" minOccurs="0"/>
       <xs:element name="cascade-detach" type="orm:emptyType" minOccurs="0"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:simpleType name="lifecycle-callback-type">
@@ -67,19 +61,15 @@
 
   <xs:complexType name="lifecycle-callback">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="type" type="orm:lifecycle-callback-type" use="required" />
     <xs:attribute name="method" type="xs:NMTOKEN" use="required" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="lifecycle-callbacks">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="lifecycle-callback" type="orm:lifecycle-callback" minOccurs="1" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="named-query">
@@ -98,7 +88,6 @@
   <xs:complexType name="named-native-query">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="query" type="xs:string" minOccurs="1" maxOccurs="1"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:string" use="required" />
     <xs:attribute name="result-class" type="orm:fqcn" />
@@ -108,14 +97,12 @@
   <xs:complexType name="named-native-queries">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="named-native-query" type="orm:named-native-query" minOccurs="1" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
   </xs:complexType>
 
   <xs:complexType name="entity-listener">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="lifecycle-callback" type="orm:lifecycle-callback" minOccurs="0" maxOccurs="unbounded"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="class" type="orm:fqcn"/>
   </xs:complexType>
@@ -148,9 +135,7 @@
         <xs:choice minOccurs="0" maxOccurs="unbounded">
             <xs:element name="entity-result" type="orm:entity-result"/>
             <xs:element name="column-result" type="orm:column-result"/>
-            <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
         </xs:choice>
-        <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:string" use="required" />
   </xs:complexType>
@@ -188,7 +173,6 @@
       <xs:element name="many-to-many" type="orm:many-to-many" minOccurs="0" maxOccurs="unbounded" />
       <xs:element name="association-overrides" type="orm:association-overrides" minOccurs="0" maxOccurs="unbounded" />
       <xs:element name="attribute-overrides" type="orm:attribute-overrides" minOccurs="0" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:string" use="required" />
     <xs:attribute name="table" type="orm:tablename" />
@@ -197,7 +181,6 @@
     <xs:attribute name="inheritance-type" type="orm:inheritance-type"/>
     <xs:attribute name="change-tracking-policy" type="orm:change-tracking-policy" />
     <xs:attribute name="read-only" type="xs:boolean" default="false" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:simpleType name="tablename" id="tablename">
@@ -210,27 +193,21 @@
   <xs:complexType name="option" mixed="true">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="option" type="orm:option"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required"/>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="options">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="option" type="orm:option" minOccurs="0" maxOccurs="unbounded"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="mapped-superclass" >
     <xs:complexContent>
       <xs:extension base="orm:entity">
         <xs:choice minOccurs="0" maxOccurs="unbounded">
-          <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
         </xs:choice>
-        <xs:anyAttribute namespace="##other"/>
       </xs:extension>
     </xs:complexContent>
   </xs:complexType>
@@ -239,7 +216,6 @@
     <xs:complexContent>
       <xs:extension base="orm:entity">
         <xs:choice minOccurs="0" maxOccurs="unbounded">
-          <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
         </xs:choice>
       </xs:extension>
     </xs:complexContent>
@@ -292,7 +268,6 @@
   <xs:complexType name="field">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="options" type="orm:options" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="type" type="xs:NMTOKEN" default="string" />
@@ -304,7 +279,6 @@
     <xs:attribute name="column-definition" type="xs:string" />
     <xs:attribute name="precision" type="xs:integer" use="optional" />
     <xs:attribute name="scale" type="xs:integer" use="optional" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="embedded">
@@ -316,78 +290,62 @@
 
   <xs:complexType name="discriminator-column">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="type" type="xs:NMTOKEN"/>
     <xs:attribute name="field-name" type="xs:NMTOKEN" />
     <xs:attribute name="length" type="xs:NMTOKEN" />
     <xs:attribute name="column-definition" type="xs:string" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="unique-constraint">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="options" type="orm:options" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="optional"/>
     <xs:attribute name="columns" type="xs:string" use="optional"/>
     <xs:attribute name="fields" type="xs:string" use="optional"/>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="unique-constraints">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="unique-constraint" type="orm:unique-constraint" minOccurs="1" maxOccurs="unbounded"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="index">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="options" type="orm:options" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="optional"/>
     <xs:attribute name="columns" type="xs:string" use="required"/>
     <xs:attribute name="fields" type="xs:string" use="optional"/>
     <xs:attribute name="flags" type="xs:string" use="optional"/>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="indexes">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="index" type="orm:index" minOccurs="1" maxOccurs="unbounded"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="discriminator-mapping">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="value" type="xs:NMTOKEN" use="required"/>
     <xs:attribute name="class" type="orm:fqcn" use="required"/>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="discriminator-map">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="discriminator-mapping" type="orm:discriminator-mapping" minOccurs="1" maxOccurs="unbounded"/>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="generator">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="strategy" type="orm:generator-strategy" use="optional" default="AUTO" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="id">
@@ -396,7 +354,6 @@
       <xs:element name="sequence-generator" type="orm:sequence-generator" minOccurs="0" maxOccurs="1" />
       <xs:element name="custom-id-generator" type="orm:custom-id-generator" minOccurs="0" maxOccurs="1" />
       <xs:element name="options" type="orm:options" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="type" type="xs:NMTOKEN" />
@@ -404,22 +361,18 @@
     <xs:attribute name="length" type="xs:NMTOKEN" />
     <xs:attribute name="association-key" type="xs:boolean" default="false" />
     <xs:attribute name="column-definition" type="xs:string" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="sequence-generator">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
       <xs:attribute name="sequence-name" type="xs:NMTOKEN" use="required" />
       <xs:attribute name="allocation-size" type="xs:integer" use="optional" default="1" />
       <xs:attribute name="initial-value" type="xs:integer" use="optional" default="1" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="custom-id-generator">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="class" type="orm:fqcn" use="required" />
   </xs:complexType>
@@ -434,14 +387,11 @@
   <xs:complexType name="inverse-join-columns">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="join-column" type="orm:join-column" minOccurs="1" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="join-column">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="optional" />
     <xs:attribute name="referenced-column-name" type="xs:NMTOKEN" use="optional" default="id" />
@@ -449,43 +399,34 @@
     <xs:attribute name="nullable" type="xs:boolean" default="true" />
     <xs:attribute name="on-delete" type="orm:fk-action" />
     <xs:attribute name="column-definition" type="xs:string" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="join-columns">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="join-column" type="orm:join-column" minOccurs="1" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="join-table">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="join-columns" type="orm:join-columns" />
       <xs:element name="inverse-join-columns" type="orm:join-columns" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="schema" type="xs:NMTOKEN" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="order-by">
       <xs:choice minOccurs="0" maxOccurs="unbounded">
           <xs:element name="order-by-field" type="orm:order-by-field" minOccurs="1" maxOccurs="unbounded" />
-          <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
       </xs:choice>
-      <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="order-by-field">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="direction" type="orm:order-by-direction" default="ASC" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:simpleType name="order-by-direction">
@@ -501,7 +442,6 @@
       <xs:element name="cascade" type="orm:cascade-type" minOccurs="0" />
       <xs:element name="join-table" type="orm:join-table" minOccurs="0" />
       <xs:element name="order-by" type="orm:order-by" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="target-entity" type="xs:string" use="required" />
@@ -510,7 +450,6 @@
     <xs:attribute name="index-by" type="xs:NMTOKEN" />
     <xs:attribute name="fetch" type="orm:fetch-type" default="LAZY" />
     <xs:attribute name="orphan-removal" type="xs:boolean" default="false" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="one-to-many">
@@ -518,7 +457,6 @@
        <xs:element name="cache" type="orm:cache" minOccurs="0" maxOccurs="1"/>
       <xs:element name="cascade" type="orm:cascade-type" minOccurs="0" />
       <xs:element name="order-by" type="orm:order-by" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="target-entity" type="xs:string" use="required" />
@@ -526,7 +464,6 @@
     <xs:attribute name="index-by" type="xs:NMTOKEN" />
     <xs:attribute name="fetch" type="orm:fetch-type" default="LAZY" />
     <xs:attribute name="orphan-removal" type="xs:boolean" default="false" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="many-to-one">
@@ -536,15 +473,12 @@
       <xs:choice minOccurs="0" maxOccurs="1">
         <xs:element name="join-column" type="orm:join-column"/>
         <xs:element name="join-columns" type="orm:join-columns"/>
-        <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
       </xs:choice>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="target-entity" type="xs:string" />
     <xs:attribute name="inversed-by" type="xs:NMTOKEN" />
     <xs:attribute name="fetch" type="orm:fetch-type" default="LAZY" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="one-to-one">
@@ -554,9 +488,7 @@
       <xs:choice minOccurs="0" maxOccurs="1">
         <xs:element name="join-column" type="orm:join-column"/>
         <xs:element name="join-columns" type="orm:join-columns"/>
-        <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
       </xs:choice>
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="target-entity" type="xs:string" />
@@ -564,13 +496,11 @@
     <xs:attribute name="inversed-by" type="xs:NMTOKEN" />
     <xs:attribute name="fetch" type="orm:fetch-type" default="LAZY" />
     <xs:attribute name="orphan-removal" type="xs:boolean" default="false" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
   <xs:complexType name="association-overrides">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="association-override" type="orm:association-override" minOccurs="1" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
   </xs:complexType>
 
@@ -579,7 +509,6 @@
       <xs:element name="join-table" type="orm:join-table" minOccurs="0" />
       <xs:element name="join-columns" type="orm:join-columns" minOccurs="0" />
       <xs:element name="inversed-by" type="orm:inversed-by-override" minOccurs="0" maxOccurs="1" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="fetch" type="orm:fetch-type" use="optional" />
@@ -592,14 +521,12 @@
   <xs:complexType name="attribute-overrides">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="attribute-override" type="orm:attribute-override" minOccurs="1" maxOccurs="unbounded" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
   </xs:complexType>
 
   <xs:complexType name="attribute-override">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="field" type="orm:attribute-override-field" minOccurs="1" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="name" type="xs:NMTOKEN" use="required" />
   </xs:complexType>
@@ -607,7 +534,6 @@
   <xs:complexType name="attribute-override-field">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:element name="options" type="orm:options" minOccurs="0" />
-      <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other"/>
     </xs:choice>
     <xs:attribute name="type" type="xs:NMTOKEN" default="string" />
     <xs:attribute name="column" type="xs:NMTOKEN" />
@@ -618,7 +544,6 @@
     <xs:attribute name="column-definition" type="xs:string" />
     <xs:attribute name="precision" type="xs:integer" use="optional" />
     <xs:attribute name="scale" type="xs:integer" use="optional" />
-    <xs:anyAttribute namespace="##other"/>
   </xs:complexType>
 
 </xs:schema>