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Subject: Transforming Global NDR Schemas to Local NDR Schemas




From: "Stephen Green" <stephen_green@seventhproject.co.uk>
To: <ubl@lists.oasis-open.org>
Date: Tue, 14 Jun 2005 14:36:33 +0100









Greetings
 
I've been looking a little (unofficially) at 
how
feasible it might be to transform 
UBL-NDR-type
(global) schemas into local NDR-type
schemas using XSLT (2.0)
 
An hour or so of work produced the 
attached
illustrative prototypes, summarized 
below.
 
Note - the concept may be far *less simple* 
for
the minor version schemas - here I've 
only
been looking at major version schemas 
without
the polymorphism envisioned for the global 
NDR
 
Note too: I've only tried writing a stylesheet 
for
the document schemas, I've started with 
a
module design which is similar for both sets 
of
schemas and I've kept the schemas very 
simple,
ignoring annotation/documentation.
 
I get the impression though that the whole 
idea
is rather feasible, given adequate 
resources/time.
 
All the best
 
Steve
 
 
 
Transforming Global NDR Schemas to Local NDR 
Schemas
(major versions)
 
Stephen Green
June 2005
 


Exclusions from this concept illustration:
 
Transformations for the imported schemas
Transformations of 
Annotation/Documentation in Schemas
Transformations of Comments in 
Schemas
** Minor version schemas **
 
 
 
Example of Global NDR:
 
Document Schema -
 
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    
xmlns="SomeDocument"
    
xmlns:uac2-0="GlobalImportedAggregateSchema"
    
xmlns:ubc2-0="GlobalImportedBasicSchema"
    
targetNamespace="SomeDocument"
    
elementFormDefault="qualified"
    
attributeFormDefault="unqualified"
    
version="1.0">
  <xsd:import 
namespace="GlobalImportedAggregateSchema" 
schemaLocation="GlobalImportedAggregateSchema.xsd"/>
  <xsd:import 
namespace="GlobalImportedBasicSchema" 
schemaLocation="GlobalImportedBasicSchema.xsd"/>
  <xsd:element 
name="SomeDocument" type="SomeDocumentType">
    
<xsd:annotation>
      
<xsd:documentation>Some 
documentation</xsd:documentation>
    
</xsd:annotation>
  </xsd:element>
  
<xsd:complexType name="SomeDocumentType">
    
<xsd:annotation>
      
<xsd:documentation>Some 
documentation</xsd:documentation>
    
</xsd:annotation>
    
<xsd:sequence>
      <xsd:element 
ref="Something" minOccurs="0" 
maxOccurs="1">
        
<xsd:annotation>
          
<xsd:documentation>Some 
documentation</xsd:documentation>
        
</xsd:annotation>
      
</xsd:element>
    </xsd:sequence>
  
</xsd:complexType>
  <xsd:element name="Something" 
type="uac2-0:SomethingType"/>
</xsd:schema>
 

Example Document - 
 
<?xml version="1.0" encoding="UTF-8"?>
<SomeDocument 
xmlns:AIAS="LocalImportedAggregateSchema" xmlns:AIBS="LocalImportedBasicSchema" 
xmlns="SomeDocument" xmlns:uac2-0="GlobalImportedAggregateSchema" 
xmlns:ubc2-0="GlobalImportedBasicSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="SomeDocument
GlobalDocumentSchema.xsd">
 <Something>
  <uac2-0:SomeReference>
   <ubc2-0:SomeID 
ID="String">normalizedString</ubc2-0:SomeID>
  </uac2-0:SomeReference>
 </Something>
</SomeDocument>
 

Example of Local NDR:
 
Document Schema -
 
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema 
xmlns="SomeDocument" xmlns:AIAS="LocalImportedAggregateSchema" 
xmlns:AIBS="LocalImportedBasicSchema" xmlns:xs="http://www.w3.org/2001/XMLSchema" 
targetNamespace="SomeDocument" elementFormDefault="qualified" 
attributeFormDefault="unqualified" version="1.0">
 <xs:import 
namespace="LocalImportedAggregateSchema" 
schemaLocation="LocalImportedAggregateSchema.xsd"/>
 <xs:import 
namespace="LocalImportedBasicSchema" 
schemaLocation="LocalImportedBasicSchema.xsd"/>
 <xs:element 
name="SomeDocument" type="SomeDocumentType"/>
 <xs:complexType 
name="SomeDocumentType">
  <xs:sequence>
   <xs:element 
name="Something" type="AIAS:SomethingType" 
minOccurs="0"/>
  </xs:sequence>
 </xs:complexType>
</xs:schema>
 
Example Document -
 
<?xml version="1.0" encoding="UTF-8"?>
<SomeDocument 
xmlns:AIAS="LocalImportedAggregateSchema" xmlns:AIBS="LocalImportedBasicSchema" 
xmlns="SomeDocument" xmlns:uac2-0="GlobalImportedAggregateSchema" 
xmlns:ubc2-0="GlobalImportedBasicSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="SomeDocument
LocalDocumentSchema.xsd">
 <Something>
  <AIAS:SomeReference>
   <AIBS:SomeID 
ID="String">normalizedString</AIBS:SomeID>
  </AIAS:SomeReference>
 </Something>
</SomeDocument>
 
 
 

Sample Stylesheet (for the transformation of the document 
schemas):
 

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet 
version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
xmlns:fn="http://www.w3.org/2005/02/xpath-functions" 
xmlns:xdt="http://www.w3.org/2005/02/xpath-datatypes" 
xmlns:ubc2-0="GlobalImportedBasicSchema" 
xmlns:uac2-0="GlobalImportedAggregateSchema" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
exclude-result-prefixes="uac2-0 ubc2-0 xsd fn xdt" >
 <xsl:output 
method="xml" version="1.0" encoding="UTF-8" 
indent="yes"/>
 <xsl:template 
match="/">
  <xsl:for-each 
select="xsd:schema">
   <xs:schema 
xmlns:AIBS="LocalImportedBasicSchema" xmlns:AIAS="LocalImportedAggregateSchema" 
xmlns:xs="http://www.w3.org/2001/XMLSchema" 
xmlns="SomeDocument">
    <xsl:attribute 
name="targetNamespace"><xsl:value-of 
select="@targetNamespace"/></xsl:attribute>
    <xsl:attribute 
name="elementFormDefault"><xsl:value-of 
select="@elementFormDefault"/></xsl:attribute>
    <xsl:attribute 
name="attributeFormDefault"><xsl:value-of 
select="@attributeFormDefault"/></xsl:attribute>
    <xsl:attribute 
name="version"><xsl:value-of 
select="@version"/></xsl:attribute>
    <xs:import>
     <xsl:attribute 
name="namespace">LocalImportedAggregateSchema</xsl:attribute>
     <xsl:attribute 
name="schemaLocation">LocalImportedAggregateSchema.xsd</xsl:attribute>
    </xs:import>
    <xs:import>
     <xsl:attribute 
name="namespace">LocalImportedBasicSchema</xsl:attribute>
     <xsl:attribute 
name="schemaLocation">LocalImportedBasicSchema.xsd</xsl:attribute>
    </xs:import>
    <xsl:for-each 
select="xsd:element[1]">
     <xs:element>
      <xsl:attribute 
name="name"><xsl:value-of 
select="@name"/></xsl:attribute>
      <xsl:attribute 
name="type"><xsl:value-of 
select="@type"/></xsl:attribute>
     </xs:element>
    </xsl:for-each>
    <!-- 
xsd:element[>1] could be used (with XSLT 2.0 say) to contribute to the 
imported schema content -->
    <xsl:for-each 
select="xsd:complexType">
     <xs:complexType>
      <xsl:attribute 
name="name"><xsl:value-of 
select="@name"/></xsl:attribute>
      <xs:sequence>
       <xsl:for-each 
select="xsd:sequence/xsd:element">
        <xs:element>
         <xsl:attribute 
name="name"><xsl:value-of 
select="@ref"/></xsl:attribute>
         <xsl:attribute 
name="type"><xsl:value-of select="concat('AIAS:', @ref, 
'Type')"/></xsl:attribute>
         <xsl:attribute 
name="minOccurs"><xsl:value-of 
select="@minOccurs"/></xsl:attribute>
        </xs:element>
       </xsl:for-each>
      </xs:sequence>
     </xs:complexType>
    </xsl:for-each>
   </xs:schema>
  </xsl:for-each>
 </xsl:template>
</xsl:stylesheet>
 
 
 
Imported Schemas:
 

Global NDR Imported Aggregate Schema - 
 
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns="GlobalImportedAggregateSchema" xmlns:ubc2-0="GlobalImportedBasicSchema" 
targetNamespace="GlobalImportedAggregateSchema" elementFormDefault="qualified" 
attributeFormDefault="unqualified" version="test">
 <xsd:import 
namespace="GlobalImportedBasicSchema" 
schemaLocation="GlobalImportedBasicSchema.xsd"/>
 <xsd:element 
name="Something" type="SomethingType"/>
 <xsd:element 
name="SomeReference" type="SomeReferenceType"/>
 <xsd:complexType 
name="SomethingType">
  <xsd:sequence>
   <xsd:element 
ref="SomeReference" 
minOccurs="0"/>
  </xsd:sequence>
 </xsd:complexType>
 <xsd:complexType 
name="SomeReferenceType">
  <xsd:sequence>
   <xsd:element 
ref="ubc2-0:SomeID" 
minOccurs="0"/>
  </xsd:sequence>
 </xsd:complexType>
</xsd:schema>
 
Global NDR Imported Basic Schema -
 
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns="GlobalImportedBasicSchema" xmlns:udt="SchemaModule" 
targetNamespace="GlobalImportedBasicSchema" elementFormDefault="qualified" 
attributeFormDefault="unqualified" version="test">
 <xsd:import 
namespace="SchemaModule" 
schemaLocation="UnqualifiedDataType.xsd"/>
 <xsd:element 
name="SomeID" type="IdentifierType"/>
 <xsd:complexType 
name="IdentifierType">
  <xsd:simpleContent>
   <xsd:extension 
base="udt:IdentifierType"/>
  </xsd:simpleContent>
 </xsd:complexType>
</xsd:schema>
 

Common Datatypes Schema ('Unqualified') -
 
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
targetNamespace="SchemaModule" xmlns:udt="SchemaModule" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
elementFormDefault="qualified" 
attributeFormDefault="unqualified">
<xsd:complexType 
name="IdentifierType">
  <xsd:simpleContent>
   <xsd:extension 
base="xsd:normalizedString">
    <xsd:attribute 
name="ID" type="xsd:normalizedString" 
use="optional">
    </xsd:attribute>
   </xsd:extension>
  </xsd:simpleContent>
 </xsd:complexType>
</xsd:schema>
 
Local NDR Imported Aggregate Schema -
 
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns="LocalImportedAggregateSchema" xmlns:AIBS="LocalImportedBasicSchema" 
targetNamespace="LocalImportedAggregateSchema" elementFormDefault="qualified" 
attributeFormDefault="unqualified" version="test">
 <xsd:import 
namespace="LocalImportedBasicSchema" 
schemaLocation="LocalImportedBasicSchema.xsd"/>
 <xsd:complexType 
name="SomethingType">
  <xsd:sequence>
   <xsd:element 
name="SomeReference" type="AIBS:SomeReferenceType" 
minOccurs="0"/>
  </xsd:sequence>
 </xsd:complexType>
</xsd:schema>
 

Local NDR Imported Basic Schema -
 
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns="LocalImportedBasicSchema" xmlns:udt="SchemaModule" 
targetNamespace="LocalImportedBasicSchema" elementFormDefault="qualified" 
attributeFormDefault="unqualified" version="test">
 <xsd:import 
namespace="SchemaModule" 
schemaLocation="UnqualifiedDataType.xsd"/>
 <xsd:complexType 
name="SomeReferenceType">
  <xsd:sequence>
   <xsd:element 
name="SomeID" 
type="udt:IdentifierType"/>
  </xsd:sequence>
 </xsd:complexType>
</xsd:schema>
 
 
 
 
 
 
 
 
GlobalLocalSchemaTransformation.zzz












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