XML_Schema: problem with <xs:unique>

[Aray]

I googled for it for few houres, but didn't resolve it, any hints will be
thinkfull.

I want to use the following XSD file to guarantee <element1is unique, but
it doesn't work.

The following is my XSD file and XML file:

----------- test.xsd ----------------
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.aray.com" targetNamespace ="http://www.aray.com"
elementFormDefa ult="qualified" >

<xs:element name="root" type="rootType" >
<xs:unique name="PK_elemen t1">
<xs:selector xpath="./element1"></xs:selector>
<xs:field xpath="."></xs:field>
</xs:unique>
</xs:element>

<xs:complexTy pe name="rootType" >
<xs:choice>
<xs:group ref="elementGro up" maxOccurs="unbo unded" minOccurs="0" />
</xs:choice>
</xs:complexType>

<xs:group name="elementGr oup">
<xs:choice>
<xs:element name="element1" type="xs:string " />
<xs:element name="element2" type="xs:string " />
</xs:choice>
</xs:group>

</xs:schema>
----------- test.xml ----------------
<?xml version="1.0" encoding="UTF-8"?>

<root xmlns="http://www.aray.com"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocat ion="http://www.aray.com test.xsd"

>

<element1>1</element1>
<element2>1</element2>
<element1>1</element1>
<!--
I expect this xml file is not valide, because the two <element1has the
same content.
But it is valide
-->
</root>

--

[Arndt Jonasson]

Aray wrote:

I googled for it for few houres, but didn't resolve it, any hints will be
thinkfull.

I want to use the following XSD file to guarantee <element1is unique, but
it doesn't work.

The following is my XSD file and XML file:

----------- test.xsd ----------------
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.aray.com" targetNamespace ="http://www.aray.com"
elementFormDefa ult="qualified" >

<xs:element name="root" type="rootType" >
<xs:unique name="PK_elemen t1">
<xs:selector xpath="./element1"></xs:selector>
<xs:field xpath="."></xs:field>
</xs:unique>
</xs:element>

<xs:complexTy pe name="rootType" >
<xs:choice>
<xs:group ref="elementGro up" maxOccurs="unbo unded" minOccurs="0" />
</xs:choice>
</xs:complexType>

<xs:group name="elementGr oup">
<xs:choice>
<xs:element name="element1" type="xs:string " />
<xs:element name="element2" type="xs:string " />
</xs:choice>
</xs:group>

</xs:schema>
----------- test.xml ----------------
<?xml version="1.0" encoding="UTF-8"?>

<root xmlns="http://www.aray.com"
xmlns:xsi="http ://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocat ion="http://www.aray.com test.xsd"

<element1>1</element1>
<element2>1</element2>
<element1>1</element1>
<!--
I expect this xml file is not valide, because the two <element1has the
same content.
But it is valide
-->
</root>

You need to specify the namespace in the XPath expression, otherwise
"element1" is taken to be in "no namespace", which is not the case.
That would work if there were no namespace involved at all. Here is the
modified start of your schema:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.aray.com" targetNamespace ="http://www.aray.com"
xmlns:ns="http://www.aray.com"
elementFormDefa ult="qualified" >

<xs:element name="root" type="rootType" >
<xs:unique name="PK_elemen t1">
<xs:selector xpath="./ns:element1"></xs:selector>
<xs:field xpath="."></xs:field>
</xs:unique>
</xs:element>
....

$ xmllint --noout --schema test.xsd test.xml
test.xml:9: element element1: Schemas validity error : Element
'{http://www.aray.com}el ement1': Duplicate key-sequence ['1'].
test.xml fails to validate

[Aray]

Thanks a lot

--

"Arndt Jonasson" <ar************ @gmail.com????
news:11******** **************@ i39g2000hsf.goo glegroups.com.. .

You need to specify the namespace in the XPath expression, otherwise
"element1" is taken to be in "no namespace", which is not the case.
That would work if there were no namespace involved at all. Here is the
modified start of your schema:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.aray.com" targetNamespace ="http://www.aray.com"
xmlns:ns="http://www.aray.com"
elementFormDefa ult="qualified" >

<xs:element name="root" type="rootType" >
<xs:unique name="PK_elemen t1">
<xs:selector xpath="./ns:element1"></xs:selector>
<xs:field xpath="."></xs:field>
</xs:unique>
</xs:element>
...

$ xmllint --noout --schema test.xsd test.xml
test.xml:9: element element1: Schemas validity error : Element
'{http://www.aray.com}el ement1': Duplicate key-sequence ['1'].
test.xml fails to validate