Allow emptyTag for optional fields

[Benson Cheng <Be...@viacore.net>]

I have a schema question, how can I write the schema that allows emptyTag for optional fields, for example:

Schema:
<xsd:element	name="Partner">
	<xsd:sequence>
		<xsd:element	name="Name"	type="xsd:string"/>
		<xsd:element	name="Age"	type="xsd:positiveInteger"	minOccurs="0"/>
	</xsd:sequence>
</xsd:element>

XML-1:
<Partner>
	<Name>MyName</Name>
</Partner>

XML-2:
<Partner>
	<Name>MyName2</Name>
	<Age/>
</Partner>

For the second XML, the Xerces throws a error like "Value '' is not a integer", my question is how can I change the schema so it can allow both XML, I know I can change the type of "Age" to xsd:string and use the regular expression "[0-9]{1,}", but I am wonder is there way to keep the xsd:positiveInteger type and also allow the empty tag the same time?

Thanks
Benson.

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