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dinesh ramSubject: Schema Newbie
Author: dinesh ram
Date: 11 Jul 2006 11:14 PM
Hi,

This is in regard to usage of global elements in schema. This is the structure for a 'Product' having multiple 'Charge' component.

<xsd:element name="Product">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="Charge" maxOccurs="unbounded" minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="Name" type="xsd:string" use="optional"/>
<xsd:attribute name="ID" type="xsd:string" use="optional"/>
<xsd:attribute name="Desc" type="xsd:string" use="optional"/>
</xsd:complexType>
</xsd:element>

I have defined Charge component independently.

<xsd:element name="Charge">
<xsd:complexType>
<xsd:attribute name="Amount" type="xsd:string"/>
<xsd:attribute name="Description" type="xsd:string"/>
</xsd:complexType>
</xsd:element>

Should I be using the 'Charge' as a ref directly in Product or should I need to use a element of type 'Charge' in Product structure?

Kindly advise.

Regards
Posttop
Ivan PedruzziSubject: Schema Newbie
Author: Ivan Pedruzzi
Date: 13 Jul 2006 12:55 AM

Hi Dinesh,

It's a design choice.

If you decide to use a reference you need to define a global element as well. All global element are considered when validating a document root.

If you are planning to use "Charge" only as child element of other elements then you should consider to define a global complex type.
See the attached example product-charge.xsd

If you need to create just a group of attributes to re-use you should consider the AttributeGroup construct.
See the attached example product-charge-attributegroup.xsd


Hope this helps
Ivan Pedruzzi
Stylus Studio Team


DocumentProduct-charge.xsd


DocumentProduct-charge-attributegroup.xsd
   
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