Re: Does xerces2-j DOMParser enforce key constraints?

[Shengyou Zeng]

Thanks, Eddie.  I did what you suggested too, and retested again
after reading your message.  The parser still doesn't complain.
-Shengyou
At 10:01 AM 06/20/2002 +1000, Eddie Robertsson wrote:
Hi,
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://www.bts.com/pcsp";
xmlns="http://www.bts.com/pcsp"; xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
<xs:element name="Contact">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Name" type="xs:string"/>
        <xs:element name="Title" type="xs:string"/>
        <xs:element name="Phone" type="xs:string"/>
        <xs:element name="Email" type="xs:string"/>
      </xs:sequence>
    </xs:complexType>
    <xs:key name="ContactKey">
        <xs:selector xpath="Contact"/>
        <xs:field xpath="Name"/>
    </xs:key>
</xs:element>
<xs:element name="ListOfContacts">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="Contact" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
    </xs:complexType>
</xs:element>
</xs:schema>
The problem is that the key is defined in the wrong place. In W3C XML 
Schemas the key should be defined on the element which defines the scope 
of the uniqueness (1), the selector element should select the element that 
should be unique (2) and the field should identify the key (3). In your 
case 1, 2 and 3 are as follows:

(1) ListOfContacts
(2) Contact
(3) Name
So, you key should be defined on the ListOfContacts element, the selector 
should select the Contact element and the field should identify the Name 
element:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://www.bts.com/pcsp";
xmlns="http://www.bts.com/pcsp"; 
xmlns:xs="http://www.w3.org/2001/XMLSchema"; elementFormDefault="qualified">
<xs:element name="Contact">
   <xs:complexType>
     <xs:sequence>
       <xs:element name="Name" type="xs:string"/>
       <xs:element name="Title" type="xs:string"/>
       <xs:element name="Phone" type="xs:string"/>
       <xs:element name="Email" type="xs:string"/>
     </xs:sequence>
   </xs:complexType>
</xs:element>
<xs:element name="ListOfContacts">
   <xs:complexType>
     <xs:sequence>
       <xs:element ref="Contact" minOccurs="0" maxOccurs="unbounded"/>
     </xs:sequence>
   </xs:complexType>
   <xs:key name="ContactKey">
       <xs:selector xpath="Contact"/>
       <xs:field xpath="Name"/>
   </xs:key>
</xs:element>

Cheers,
/Eddie
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