Validating a xml doc against schema

hi,
i'm confused about validation of xml doc against its schema. suppose i've the followings:
XML file ("note.xml"):
----------------------
<?xml version="1.0"?>
<note
xmlns="http://www.w3schools.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.w3schools.com/schema/note.xsd">
<to>Angel</to>
<from>Helpless</from>
<phone>238768</phone>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
And the schema ("note.xsd"):
-----------------------------
<?xml version="1.0" encoding="ISO-8859-1"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.w3schools.com"
xmlns="http://www.w3schools.com"
elementFormDefault="qualified">
<xs:element name="note">
<xs:complexType>
<xs:sequence>
<xs:element name="to" type="xs:string"/>
<xs:element name="from" type="xs:string"/>
<xs:element name="heading" type="xs:string"/>
<xs:element name="body" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
if you look at the "note.xml" file where i've put an element "phone" which is not defined in schema "note.xsd". so when i validate from IE5 by right clicking on it and selecting Validate XML, no erorr is reported. i don't understand why. or is it because my validation process is wrong? my understanding is that a xml doc must not contain an element that's not defined in schema. please clarify me it. thanks.
himal

I think for the xsi:schemaLocation you need to give the targetnamespace followed by the schema file name. I guess you missed giving the target namespace here. Try doing it that way.

Himal,
IE5 doesn't validate your XML file. I don't think it even looks at the schema file at all.
In case of a DTD file, IE5 needs to retrieve entity values and default/constant values of attributes from the file. Therefore, IE5 checks the DTD syntax and reports DTD syntax errors.
Cheers,
Dan

hi dan,
how could i validate a xml doc against its schema then? can you please let me know? would appreciate if anyone could tell me.
thanks.
himal

Download Topologi Schematron validator,or XMLSPY or use XSV online at W3C site,or download Sun MSV.....go thorough thier read me files,u will cometo know how to do it.
Regards
balaji