[EMAIL PROTECTED] wrote:
Thanks Alberto. However, When I am trying to enforce unique constraint
on single attribute for multiple instances,I am still facing
difficulty.Here is my sample XML
<CLM:ClientTable>
<CLM:ClientEntry ClientId="1">
<CLM:ClientProcessId>*12*</CLM:ClientProcessId>
</CLM:ClientEntry>
<CLM:ClientEntry ClientId="2">
<CLM:ClientProcessId>*12*</CLM:ClientProcessId>
</CLM:ClientEntry>
<CLM:ClientEntry ClientId="3">
<CLM:ClientProcessId>*12*</CLM:ClientProcessId>
</CLM:ClientEntry>
</CLM:ClientTable>
I am trying to make *ClientProcessId* Unique across different
"*ClientEntry*" and attached schema fails to do so. Any pointers would
be of great help!
The elements are in a namespace, so you should write
<xsd:selector xpath="c:ClientTable/c:ClientEntry"/>
<xsd:field xpath="c:ClientProcessId"/>
and add a xmlns:c="CLM" to the root element
XPath expressions ignore the default namespace, in order to be able to
always reference the empty namespace (http://www.w3.org/TR/xpath#node-tests)
Alberto
Thanks,
Karuna
-----Original Message-----
From: Alberto Massari [mailto:[EMAIL PROTECTED]
Sent: Friday, April 04, 2008 7:56 PM
To: [email protected]
Subject: Re: Will Sax support xsd:unique?
Your schema is wrong; you are defining the unique constraint inside
the <number> element, but you need to place it in the <root> element.
Also, if you want to detect duplicates between <number> and <digit>,
you need to add both to your xs:unique
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
<xs:element name="root">
<xs:complexType>
<xs:sequence>
<xs:element ref="number"/>
<xs:element ref="digit"/>
</xs:sequence>
</xs:complexType>
<xs:unique name="numberUnique">
<xs:selector xpath="number | digit"></xs:selector>
<xs:field xpath="."></xs:field>
</xs:unique>
</xs:element>
<xs:element name="number" type="xs:integer"/>
<xs:element name="digit" type="xs:integer"/> </xs:schema>
Alberto
[EMAIL PROTECTED] wrote:
> Hi All,
>
> I have the following XSD where my "number" is having unique constarint
>
> <?xml version="1.0" encoding="UTF-8"?> <xs:schema
> xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified">
> <xs:element name="root">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="number"/>
> <xs:element ref="digit"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:element name="number" type="xs:integer"> <xs:unique
> name="numberUnique"> <xs:selector xpath="number"></xs:selector>
> <xs:field xpath="."></xs:field> </xs:unique> </xs:element> <xs:element
> name="digit" type="xs:integer"/> </xs:schema>
>
> My corresponding XML is like below
>
> <?xml version="1.0" encoding="UTF-8"?> <root
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:noNamespaceSchemaLocation="Unique.xsd">
> <number> 2</number>
> <digit>2</digit>
> </root>
>
> As i understand, since number has xsd:unique constraint, the value
> should be unique in its parent scope.
> But in my above XML, the values for "number" and "digit" are same,
> which is 2. When i validate the XML using SAX, i am not seeing any
error.
>
> Can SAX support xsd:unique constraint? if yes, why the error was not
> reported for above case
>
> Thanks a lot,
> Karuna
>
>
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