RE: [xml-dev] XML Question

["CHIUSANO, Joseph" <JCHIUSANO@lmi.org>]

Title: RE: [xml-dev] XML Question

You're welcome Saurabh.  I have not examined the example you provided for accuracy - but I believe your question is: "how can I reference a schema from within an XML instance document?".  There are 2 methods for doing so - which method you use depends on whether or not the schema to which the XML instance document validates has a target namespace.

If the schema does not have a target namespace, the root element of the XML instance document will look as follows:

<SomeRootElement xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                                    xsi:noNamespaceSchemaLocation= "SomeSchema.xsd">

-- where "SomeSchema.xsd" is the name/location of the schema to which the XML instance document validates..

 If the schema has a target namespace, the root element of the XML instance document will look as follows:

<SomeRootElement xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                                    xsi:schemaLocation="http://www.sometargetnamespace.org" "SomeSchema.xsd">

-- where "http://www.sometargetnamespace.org" is the target namespace of the schema "SomeSchema.xsd".

Hope that helps,

Joe Chiusano

LMI

**************************************************************************
  Joseph M. Chiusano
  Logistics Management Institute
  2000 Corporate Ridge
  McLean, VA 22102
  Email: jchiusano@lmi.org
  Tel: 571.633.7722
**************************************************************************

-----Original Message-----
From: Saxena, Saurabh [mailto:saurabh.saxena@intel.com]
Sent: Wednesday, May 29, 2002 8:35 AM
To: 'CHIUSANO, Joseph'
Subject: RE: [xml-dev] XML Question

HI

This was an excellent example.Thanks for it. I have one more question

I am using the Schema.xsd file as

 

<schema targetNamespace="">              

            
<element name="XML">
  <complexType name="XML" content="elementOnly">
                        <element ref="TEST1" minOccurs="0" maxOccurs="1"/>
                        <element ref="TEST2" minOccurs="0" maxOccurs="*"/>
  </complexType>
 </element>

etc...

To include xsd what decalration i have to use in the schema.xsd file

 

Once again thanks for the help

regards

Saurabh

-----Original Message-----
From: CHIUSANO, Joseph [mailto:JCHIUSANO@lmi.org]
Sent: Wednesday, May 29, 2002 5:39 PM
To: 'Saxena, Saurabh'; 'xml-dev@lists.xml.org'
Subject: RE: [xml-dev] XML Question

Saurabh,

I'll try my best to answer your question without an example of your schema.  If you are using the "sequence" compositor, the elements must appear in the XML instance document in the order in which they are declared in the schema.  For example:

<xsd:complexType name="SomeType">
   <xsd:sequence>
      <xsd:element name="FirstElement" type="xsd:string"/>
      <xsd:element name="SecondElement" type="xsd:string"/>
      <xsd:element name="ThirdElement" type="xsd:string"/>
   </xsd:sequence>
</xsd:complexType>

So if you are using the "sequence" compositor, you will want to change it to the "all" compositor.  The "all" compositor allows the elements declared within it to appear in the XML instance document in any order.  For example:

<xsd:complexType name="SomeType">
   <xsd:all>
      <xsd:element name="FirstElement" type="xsd:string"/>
      <xsd:element name="SecondElement" type="xsd:string"/>
      <xsd:element name="ThirdElement" type="xsd:string"/>
   </xsd:all>
</xsd:complexType>

If this doesn't suffice, I would recommend you consider the "wildcard" feature of W3C Schema (although this may be a bit extreme for your purposes).  The wildcard feature uses an "any" construct for elements (and an "anyAttribute construct for attributes) to create a "placeholder" at which any well-formed XML may appear in an instance document - i.e. it does not specify element/attribute declarations or datatype definitions.  In the following example, the element "ThirdElement" may be (does not have to be) followed in an XML instance document by one or more elements:

<xsd:complexType name="SomeType">
   <xsd:sequence>
      <xsd:element name="FirstElement" type="xsd:string"/>
      <xsd:element name="SecondElement" type="xsd:string"/>
      <xsd:element name="ThirdElement" type="xsd:string"/>
      <xsd:any minOccurs="0"/>
   </xsd:sequence>
</xsd:complexType>

Hope this helps,
Joe Chiusano
LMI
> **************************************************************************
>   Joseph M. Chiusano
>   Logistics Management Institute
>   2000 Corporate Ridge
>   McLean, VA 22102
>   Email: jchiusano@lmi.org
>   Tel: 571.633.7722
> **************************************************************************
>

-----Original Message-----
From: Saxena, Saurabh [mailto:saurabh.saxena@intel.com]
Sent: Wednesday, May 29, 2002 6:33 AM
To: 'xml-dev@lists.xml.org'
Subject: [xml-dev] XML Question

Hi
I am using XML Schema to validate a XML file.If i make change in the
sequence of the TAGS as defined in the Schema.xsd file the parser is giving
an error.Is there any way to ignore that and allow to define the TAGS in any
sequence

regards,
Saurabh Saxena

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