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Re: Schema Extension and validation of an instance

• To: Christopher Foley <ccfoley@g...>
• Subject: Re: Schema Extension and validation of an instance
• From: George Cristian Bina <george@o...>
• Date: Tue, 18 Jul 2006 17:04:40 +0300
• Cc: xml-dev@l...
• In-reply-to: <eb5c91880607180628id94e1dbxfd8b82e4c21e99a6@m...>
• References: <eb5c91880607180628id94e1dbxfd8b82e4c21e99a6@m...>
• User-agent: Thunderbird 1.5.0.4 (Windows/20060516)

Hi,

You need to use redefine to redefine the IPDRType. For that you need to 
have a schema with the same target namespace as the schema that defines 
IPDRType, so you should move the element declarations for the elements 
in the http://www.mySchema.com/ccf namespace in a separate schema file.
A working sample is below:

ccf.xsd
=======
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
   targetNamespace="http://www.mySchema.com/ccf"
   xmlns:ccf="http://www.mySchema.com/ccf">

   <element name="transactionID" type="string"/>
   <element name="serviceID" type="string"/>
   <element name="serviceName" type="string"/>
   <element name="customerID" type="string"/>
   <element name="sessionID" type="string"/>
   <element name="timeZoneOffset" type="string"/>
</schema>

refedIPDR.xsd
=============
<?xml version = "1.0" encoding = "UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
   targetNamespace="http://www.ipdr.org/namespaces/IPDR"
   xmlns:ccf="http://www.mySchema.com/ccf"
   xmlns:ipdr="http://www.ipdr.org/namespaces/IPDR">

   <import namespace="http://www.mySchema.com/ccf"
     schemaLocation="ccf.xsd"/>

   <redefine schemaLocation="http://www.ipdr.org/public/IPDRDoc3.5.xsd">
     <complexType name="IPDRType">
       <complexContent>
         <extension base="ipdr:IPDRType">
           <sequence>
             <element ref="ccf:transactionID" minOccurs="0"/>
             <element ref="ccf:serviceID" minOccurs="0"/>
             <element ref="ccf:serviceName" minOccurs="0"/>
             <element ref="ccf:customerID" minOccurs="0"/>
             <element ref="ccf:sessionID" minOccurs="0"/>
             <element ref="ccf:timeZoneOffset" minOccurs="0"/>
           </sequence>
         </extension>
       </complexContent>
     </complexType>
   </redefine>

</schema>


valid instance

<?xml version="1.0"?>
<ipdr:IPDR xmlns="http://www.mySchema.com/ccf"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:ipdr="http://www.ipdr.org/namespaces/IPDR"
   xsi:schemaLocation="http://www.mySchema.com/ccf
   ccf.xsd http://www.ipdr.org/namespaces/IPDR redef.xsd">

   <ipdr:IPDRCreationTime>2001-05-31T13:20:00.561Z</ipdr:IPDRCreationTime>
   <ipdr:seqNum>1</ipdr:seqNum>
   <transactionID>1</transactionID>
   <serviceID>1</serviceID>
   <serviceName>New</serviceName>
   <customerID>Chris</customerID>
   <sessionID>1</sessionID>
   <timeZoneOffset>12</timeZoneOffset>
</ipdr:IPDR>


Best Regards,
George
---------------------------------------------------------------------
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com


Christopher Foley wrote:
> Hi,
> 
> I want to extend an XML schema. An element exits in the base schema,
> which is defined to be of a certain complexType. I want to use this
> element but to extend its type. I do this with the files below but
> when I validate an instance of the extended schema , I get problems.
> 
> The base schema (IPDRDoc3.5.xsd) is as follows;
> =====================================
> 
> <schema xmlns="http://www.w3.org/2001/XMLSchema"
> targetNamespace="http://www.ipdr.org/namespaces/IPDR"
> xmlns:ipdr="http://www.ipdr.org/namespaces/IPDR" version="3.5">
>  <include schemaLocation="http://www.ipdr.org/public/IPDRTypes.xsd" />
> - <complexType name="IPDRType" final="restriction">
> - <annotation>
>  <documentation>This is the base type for the IPDR element. The
> service-specific schema can extend this by deriving from
> it.</documentation>
>  </annotation>
> - <sequence>
>  <element ref="ipdr:IPDRCreationTime" minOccurs="0" />
>  <element ref="ipdr:seqNum" minOccurs="0" />
>  </sequence>
>  </complexType>
> - <element name="IPDR" type="ipdr:IPDRType">
> - <annotation>
>  <documentation>An IPDR describes an event between a service consumer
> and a service element. Details of the event are contained within this
> record. All IPDR elements have a time indicating when the event
> occurred.</documentation>
>  </annotation>
>  </element>
>  </schema>
> 
> I want to use the IPDR element but extend the IPDRType complexType.
> 
> My Extending schema(filename -> ExtendedIPDR.xsd);
> =========================================
> 
> <?xml version = "1.0" encoding = "UTF-8"?>
> <schema xmlns = "http://www.w3.org/2001/XMLSchema"
>     targetNamespace = "http://www.mySchema.com/ccf"
>     xmlns:ccf = "http://www.mySchema.com/ccf
>     xmlns:ipdr = "http://www.ipdr.org/namespaces/IPDR">
> 
> <import namespace="http://www.ipdr.org/namespaces/IPDR"
> schemaLocation="http://www.ipdr.org/public/IPDRDoc3.5.xsd" />
> 
> 
> <complexType name="IPDRTypeExtended">
> <complexContent>
> <extension base="ipdr:IPDRType">
> <sequence>
>     <element name="ccf:transactionID" type="string" minOccurs="0"/>
>     <element name="ccf:serviceID" type="string" minOccurs="0" />
>     <element name="ccf:serviceName" type="string" minOccurs="0" />
>     <element name="ccf:customerID" type="string" minOccurs="0" />
>     <element name="ccf:sessionID" type="string" minOccurs="0" />
>     <element name="ccf:timeZoneOffset" type="string" minOccurs="0" />
> </sequence>
> </extension>
> </complexContent>
> </complexType>
> </schema>
> 
> Now I create an XML instance of my extended schema;
> ========================================
> 
> <?xml version="1.0"?>
> <ipdr:IPDR xmlns="http://www.mySchema.com/ccf "
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xmlns:ipdr="http://www.ipdr.org/namespaces/IPDR"
>     xsi:schemaLocation="http://www.mySchema.com/ccf
> C:\myDownloads\myFiles\ExtendedIPDR.xsd">
> 
>     <ipdr:IPDRCreationTime>2001-0531T13:20:00.561Z</ipdr:IPDRCreationTime>
>     <ipdr:seqNum>1</ipdr:seqNum>
>     <transactionID>1</transactionID>
>     <serviceID>1</serviceID>
>     <serviceName>New</serviceName>
>     <customerID>Chris</customerID>
>     <sessionID>1</sessionID>
>     <timeZoneOffset>12</timeZoneOffset>
> </ipdr:IPDR>
> 
> Now my problem is when I validate the instance above against the
> extended schema(I am using Xselerator to do my validation). The error
> I'm getting is;
> ' The element 'transactionID' is used but not declared in the schema'.
> 
> But transactionID is defined and I even tried to prefix it with 'ccf'
> xmlns:ccf="http://www.mySchema.com/ccf" in the instance document and
> it still dosen't work.
> 
> Do I need to redefine the IPDR element itself to be of type 
> 'IPDRTypeExtended'??
> 
> Any help appreciated.
> 
> Best Regards,
> Chris.
> 
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  • Schema Extension and validation of an instance
    • From: "Christopher Foley" <ccfoley@g...>

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