xsd how to include a targetNamespace in an element - xsd-validation

Question

I have the following xsd where I defined a targetNamespace. I want to include the targetNamespace in the element lastModifiedDate. This xsd is incorrect:
<xs:schema version="1.0" targetNamespace="http://com.uciext.ws.hw5" xmlns:tns="http://com.uciext.ws.hw5" xmlns:xs="http://www.w3.org/2001/XMLSchema" >
<xs:element name="catalog">
<xs:complexType>
<xs:sequence>
<xs:element ref="lastModifiedDate"/>
<xs:element ref="description"/>
<xs:element maxOccurs="unbounded" ref="product"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="lastModifiedDate" type="xs:string"/>
<xs:element name="description" type="xs:string"/>
<xs:element name="product">
<xs:complexType>
<xs:sequence>
<xs:element ref="sku"/>
<xs:element ref="name"/>
<xs:element ref="price"/>
<xs:element ref="quantity"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="sku" type="xs:string"/>
<xs:element name="name" type="xs:string"/>
<xs:element name="price" type="xs:double"/>
<xs:element name="quantity" type="xs:double"/>
</xs:schema>
I get the following element when I check this xsd:
Error resolving component 'lastModifiedDate'. It was detected that 'lastModifiedDate' has no namespace
How can I include the targetNamespace?

Answer 1

I think you need to add the namespace in every referred element...
<xs:schema version="1.0" targetNamespace="http://com.uciext.ws.hw5" xmlns:tns="http://com.uciext.ws.hw5" xmlns:xs="http://www.w3.org/2001/XMLSchema" >
<xs:element name="catalog">
<xs:complexType>
<xs:sequence>
<xs:element ref="tns:lastModifiedDate"/>
<xs:element ref="tns:description"/>
<xs:element maxOccurs="unbounded" ref="tns:product"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="lastModifiedDate" type="xs:string"/>
<xs:element name="description" type="xs:string"/>
<xs:element name="product">
<xs:complexType>
<xs:sequence>
<xs:element ref="tns:sku"/>
<xs:element ref="tns:name"/>
<xs:element ref="tns:price"/>
<xs:element ref="tns:quantity"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="sku" type="xs:string"/>
<xs:element name="name" type="xs:string"/>
<xs:element name="price" type="xs:double"/>
<xs:element name="quantity" type="xs:double"/>
</xs:schema>
Hope it helps...
Regards