diff --git a/schemas/adl-0.xsd b/schemas/adl-0.xsd
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+<schema
+  xmlns='http://www.w3.org/2000/10/XMLSchema'
+  targetNamespace='http://www.cygnets.co.uk/schemas/adl/'
+  xmlns:adl='http://www.cygnets.co.uk/schemas/adl/'>
+
+    <!--  ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::  -->
+    <!--						    											                                  -->
+    <!--	adl-0.xsd    			    										                            -->
+    <!--																		                                    -->
+    <!--	Purpose:															                                -->
+    <!--	XML Schema Application Description Language. Note that this     -->
+    <!--        is experimental; the DTD is still normative at this stage       -->
+    <!--        This revision autoconverted using dtd2xsd.pl from               -->
+    <!--        adl-0.dtd revision 1.2                                          -->
+    <!--																		                                    -->
+    <!--	Author:		Simon Brooke <simon@cygnets.co.uk>			  	                -->
+    <!--	Created:	9th January 2008										                        -->
+    <!--        $Revision: 1.1 $
+    <!--	Copyright:	(c) 2008 Cygnet Solutions Ltd						                  -->
+    <!--      							      									                            -->
+    <!--  ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::  -->
+
+<!-- the application that the document describes: required top level element -->
+ <element name='application'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:content' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:definition' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:group' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:entity' minOccurs='0' maxOccurs='unbounded'/>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='version' type='string' use='optional'/>
+  </complexType>
+ </element>
+
+    <!-- 
+	the definition of a defined type. At this stage a defined type is either
+	a string		in which case it must have size and pattern, or
+	a scalar		in which case it must have minimum and/or maximum
+	pattern must be a regular expression as interpreted by org.apache.regexp.RE
+	minimum and maximum must be of appropriate format for the datatype specified.
+	Validation may be done client-side and/or server-side at application layer
+	and/or server side at database layer.
+
+  name:     the name of this definition
+  type:     the simple type on which this defined type is based
+  size:     the data size of this defined type
+  pattern:  a regular expression which values for this type must match
+  minimum:  the minimum value for this type (if base type is scalar)
+  maximum:  the maximum value for this type (if base type is scalar)
+  -->
+ <element name='definition'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:help' minOccurs='0' maxOccurs='unbounded'/>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='type' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='string'/>
+      <enumeration value='integer'/>
+      <enumeration value='real'/>
+      <enumeration value='money'/>
+      <enumeration value='date'/>
+      <enumeration value='time'/>
+      <enumeration value='timestamp'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+   <attribute name='size' type='string' use='optional'/>
+   <attribute name='pattern' type='string' use='optional'/>
+   <attribute name='minimum' type='string' use='optional'/>
+   <attribute name='maximum' type='string' use='optional'/>
+  </complexType>
+ </element>
+
+<!-- 
+  a group of people with similar permissions to one another 
+  name: the name of this group
+  parent: the name of a group of which this group is subset
+  -->
+ <element name='group'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='parent' type='string' use='optional'/>
+  </complexType>
+ </element>
+
+<!-- 
+	an entity which has properties and relationships; maps onto a database
+	table or a Java serialisable class - or, of course, various other things
+  
+  name:         obviously, the name of this entity
+  natural-key:  if present, the name of a property of this entity which forms
+                a natural primary key [NOTE: Only partly implemented. NOTE: much of
+                the present implementation assumes all primary keys will be 
+                integers. This needs to be fixed!]
+-->
+ <element name='entity'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:content' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:property' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:permission' minOccurs='0' maxOccurs='unbounded'/>
+    <choice minOccurs='0' maxOccurs='unbounded'>
+     <element ref='adl:form'/>
+     <element ref='adl:page'/>
+     <element ref='adl:list'/>
+    </choice>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='natural-key' type='string' use='optional'/>
+  </complexType>
+ </element>
+
+<!-- 
+  contains documentation on the element which immediately contains it. TODO:
+  should HTML markup within a documentation element be allowed? If so, are
+  there restrictions?
+-->
+ <element name='documentation'>
+  <complexType mixed='true'>
+  </complexType>
+ </element>
+
+<!-- 
+	a property (field) of an entity (table) 
+	
+	name:			  the name of this property.
+	type:			  the type of this property.
+	default:		the default value of this property. There will probably be 
+					    magic values of this!
+	definition:	name of the definition to use, it type = 'defined'.
+	distinct:		distinct='system' required that every value in the system 
+					    will be distinct (i.e. natural primary key);
+					    distinct='user' implies that the value may be used by users 
+					    in distinguishing entities even if values are not formally 
+					    unique; 
+					    distinct='all' implies that the values are formally unique 
+					    /and/ are user friendly (NOTE: not implemented).
+	entity:			if type='entity', the name of the entity this property is 
+					    a foreign key link to.
+              if type='list', the name of the entity that has a foreign 
+              key link to this entity
+  farkey:     if type='list', the name of farside key in the listed 
+              entity
+	required:		whether this propery is required (i.e. 'not null').
+	size: 			fieldwidth of the property if specified.
+  concrete:   if set to 'false', this property is not stored in the 
+              database but must be computed (manually written code must
+              be provided to support this)
+-->
+ <element name='property'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:permission' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:option' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:prompt' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:help' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:ifmissing' minOccurs='0' maxOccurs='unbounded'/>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='type' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='entity'/>
+      <enumeration value='link'/>
+      <enumeration value='list'/>
+      <enumeration value='defined'/>
+      <enumeration value='string'/>
+      <enumeration value='integer'/>
+      <enumeration value='real'/>
+      <enumeration value='money'/>
+      <enumeration value='date'/>
+      <enumeration value='time'/>
+      <enumeration value='timestamp'/>
+      <enumeration value='boolean'/>
+      <enumeration value='text'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+   <attribute name='default' type='string' use='optional'/>
+   <attribute name='definition' type='string' use='optional'/>
+   <attribute name='distinct' use='optional'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='none'/>
+      <enumeration value='all'/>
+      <enumeration value='user'/>
+      <enumeration value='system'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+   <attribute name='entity' type='string' use='optional'/>
+   <attribute name='farkey' type='string' use='optional'/>
+   <attribute name='required' use='optional'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='true'/>
+      <enumeration value='false'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+   <attribute name='size' type='string' use='optional'/>
+   <attribute name='concrete' use='optional'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='true'/>
+      <enumeration value='false'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+  </complexType>
+ </element>
+
+<!-- 
+	one of an explicit list of optional values a property may have 
+	NOTE: whether options get encoded at application layer or at database layer 
+	is UNDEFINED; either behaviour is correct. If at database layer it's also 
+	UNDEFINED whether they're encoded as a single reference data table or as 
+	separate reference data tables for each property.
+-->
+ <element name='option'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:prompt' minOccurs='0' maxOccurs='unbounded'/>
+   </sequence>
+   <attribute name='value' type='string' use='optional'/>
+  </complexType>
+ </element>
+
+<!-- 
+	permissions policy on an entity, a page, form, list or field 
+	
+	group: 			the group to which permission is granted
+	permission:		the permission which is granted to that group
+-->
+ <element name='permission'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+   </sequence>
+   <attribute name='group' type='string' use='required'/>
+   <attribute name='permission' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='none'/>
+      <enumeration value='read'/>
+      <enumeration value='insert'/>
+      <enumeration value='noedit'/>
+      <enumeration value='edit'/>
+      <enumeration value='all'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+  </complexType>
+ </element>
+
+<!--
+  pragmatic advice to generators of lists and forms, in the form of 
+  name/value pairs which may contain anything. Over time some pragmas
+  will become 'well known', but the whole point of having a pragma
+  architecture is that it is extensible.
+-->
+ <element name='pragma'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='value' type='string' use='required'/>
+  </complexType>
+ </element>
+
+<!-- 
+	a prompt for a property or field; used as the prompt text for a widget 
+	which edits it. Typically there will be only one of these per property
+  per locale; if there are more than one all those matching the locale may
+  be concatenated, or just one may be used.
+	
+	prompt:			the prompt to use
+	locale:			the locale in which to prefer this prompt	
+-->
+ <element name='prompt'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+   </sequence>
+   <attribute name='prompt' type='string' use='required'/>
+   <attribute name='locale' type='string' use='required'/>
+  </complexType>
+ </element>
+
+<!-- 
+	helptext about a property of an entity, or a field of a page, form or 
+	list, or a definition. Typically there will be only one of these per property
+  per locale; if there are more than one all those matching the locale may
+  be concatenated, or just one may be used.
+
+	locale:			the locale in which to prefer this prompt	
+-->
+ <element name='help'>
+  <complexType mixed='true'>
+   <attribute name='locale' type='string' use='required'/>
+  </complexType>
+ </element>
+
+ <!--
+  helpful text to be shown if a property value is missing, typically when 
+  a form is submitted. Typically there will be only one of these per property
+  per locale; if there are more than one all those matching the locale may
+  be concatenated, or just one may be used. Later there may be more sophisticated
+  behaviour here.
+-->
+<element name='ifmissing'>
+  <complexType mixed='true'>
+   <attribute name='locale' type='string' use='required'/>
+  </complexType>
+ </element>
+
+<!-- a form through which an entity may be added or edited -->
+ <element name='form'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <choice minOccurs='0' maxOccurs='unbounded'>
+     <element ref='adl:head'/>
+     <element ref='adl:top'/>
+     <element ref='adl:foot'/>
+     <element ref='adl:field'/>
+     <element ref='adl:fieldgroup'/>
+     <element ref='adl:auxlist'/>
+     <element ref='adl:verb'/>
+     <element ref='adl:permission'/>
+     <element ref='adl:pragma'/>
+    </choice>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='properties' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='all'/>
+      <enumeration value='user-distict'/>
+      <enumeration value='listed'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+  </complexType>
+ </element>
+
+<!-- a page on which an entity may be displayed -->
+ <element name='page'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <choice minOccurs='0' maxOccurs='unbounded'>
+     <element ref='adl:head'/>
+     <element ref='adl:top'/>
+     <element ref='adl:foot'/>
+     <element ref='adl:field'/>
+     <element ref='adl:fieldgroup'/>
+     <element ref='adl:auxlist'/>
+     <element ref='adl:verb'/>
+     <element ref='adl:permission'/>
+     <element ref='adl:pragma'/>
+    </choice>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='properties' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='all'/>
+      <enumeration value='user-distict'/>
+      <enumeration value='listed'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+  </complexType>
+ </element>
+
+<!-- 
+	a list on which entities of a given type are listed
+
+	onselect:		name of form/page/list to go to when
+					    a selection is made from the list 
+-->
+ <element name='list'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <choice minOccurs='0' maxOccurs='unbounded'>
+     <element ref='adl:head'/>
+     <element ref='adl:top'/>
+     <element ref='adl:foot'/>
+     <element ref='adl:field'/>
+     <element ref='adl:fieldgroup'/>
+     <element ref='adl:auxlist'/>
+     <element ref='adl:verb'/>
+     <element ref='adl:permission'/>
+     <element ref='adl:pragma'/>
+    </choice>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+   <attribute name='properties' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='all'/>
+      <enumeration value='user-distict'/>
+      <enumeration value='listed'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+   <attribute name='onselect' type='string' use='optional'/>
+  </complexType>
+ </element>
+
+<!--
+  a subsidiary list, on which entities related to primary
+  entities in the enclosing page or list are listed
+  
+  property:   the property of the enclosing entity that this
+              list displays (obviously, must be of type='list')
+  onselect:   the form or page of the listed entity to call
+              when an item from the list is selected
+  canadd:     true if the user should be able to add records
+              to this list
+  -->
+ <element name='auxlist'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <choice minOccurs='0' maxOccurs='unbounded'>
+     <element ref='adl:prompt'/>
+     <element ref='adl:field'/>
+     <element ref='adl:fieldgroup'/>
+     <element ref='adl:auxlist'/>
+     <element ref='adl:verb'/>
+    </choice>
+   </sequence>
+   <attribute name='property' type='string' use='required'/>
+   <attribute name='onselect' type='string' use='optional'/>
+   <attribute name='canadd' use='optional'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='true'/>
+      <enumeration value='false'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+  </complexType>
+ </element>
+
+<!--
+  a group of fields and other controls within a form or list, which the 
+  renderer might render as a single pane in a tabbed display, for example.
+  -->
+ <element name='fieldgroup'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <choice minOccurs='0' maxOccurs='unbounded'>
+     <element ref='adl:prompt'/>
+     <element ref='adl:field'/>
+     <element ref='adl:fieldgroup'/>
+     <element ref='adl:auxlist'/>
+     <element ref='adl:verb'/>
+    </choice>
+   </sequence>
+   <attribute name='name' type='string' use='required'/>
+  </complexType>
+ </element>
+
+<!-- a field in a form or page
+
+  property:   the property which this field displays/edits
+  -->
+ <element name='field'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:prompt' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:help' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:permission' minOccurs='0' maxOccurs='unbounded'/>
+   </sequence>
+   <attribute name='property' type='string' use='required'/>
+  </complexType>
+ </element>
+
+<!-- a verb is something that may be done through a form. Probably the verbs 'store' 
+  and 'delete' are implied, but maybe they need to be explicitly declared. The 'verb'
+  attribute of the verb is what gets returned to the controller -->
+ <element name='verb'>
+  <complexType>
+   <sequence>
+    <element ref='adl:documentation' minOccurs='0' maxOccurs='1'/>
+    <element ref='adl:prompt' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:help' minOccurs='0' maxOccurs='unbounded'/>
+    <element ref='adl:permission' minOccurs='0' maxOccurs='unbounded'/>
+   </sequence>
+   <attribute name='verb' type='string' use='required'/>
+   <attribute name='dangerous' use='required'>
+    <simpleType>
+     <restriction base='string'>
+      <enumeration value='true'/>
+      <enumeration value='false'/>
+     </restriction>
+    </simpleType>
+   </attribute>
+  </complexType>
+ </element>
+
+<!-- a container for global content -->
+ <element name='content'>
+  <complexType>
+   <choice minOccurs='0' maxOccurs='unbounded'>
+    <element ref='adl:head'/>
+    <element ref='adl:top'/>
+    <element ref='adl:foot'/>
+   </choice>
+  </complexType>
+ </element>
+
+<!-- 
+	content to place in the head of the generated document; this is #PCDATA 
+	because it will almost certainly belong to a different namespace 
+	(usually HTML)
+-->
+ <element name='head'>
+  <complexType mixed='true'>
+  </complexType>
+ </element>
+
+<!-- 
+	content to place in the top of the body of the generated document; 
+	this is #PCDATA because it will almost certainly belong to a different 
+	namespace (usually HTML)
+-->
+ <element name='top'>
+  <complexType mixed='true'>
+  </complexType>
+ </element>
+
+<!-- 
+	content to place at the foot of the body of the generated document; 
+	this is #PCDATA because it will almost certainly belong to a different 
+	namespace (usually HTML)
+-->
+ <element name='foot'>
+  <complexType mixed='true'>
+  </complexType>
+ </element>
+</schema>