What you are asking this is easy and you may have used it before:

var xmlDomObj = new ActiveXObject("MSXML2.DOMDocument.4.0");
xmlDomObj .async = false; 
xmlDomObj .validateOnParse = true; // <-- validate (default is true)
xmlDomObj .load("instance.xml");
if (xmlDomObj .parseError.errorCode != 0) 
     // Handle error 
else 
     // continue


You can also associate an instance with a schema through the read/write
schemas property [1].
I prefer a more convenient and standard method to do the association by
using the xsi:schemaLocation attribute in the instance document.


[1]
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/
htm/xml_pro_sz_3i5h.asp

Cheers,

Manos



>  -----Original Message-----
>  From: Braumuller, Hans [mailto:h.braumueller@[...].de] 
>  Sent: Tuesday, February 26, 2002 11:34 AM
>  To: 'xml-dev@lists.xml.org'
>  Subject: [xml-dev] XML Schema - > XML Instance - > XSLT 
>  Transformation with MSXML 4 ?
>  
>  
>  Hello,
>  
>  this is my first post at this list. I am working daily as 
>  webdesigner at
>  Hanse Orga, Germany and being a visual artist engage in 
>  networking art and
>  poetry. As webdesigner i am developing the XML/XSL/CSS/JS 
>  User-Interface.
>  
>  What we are doing at Hanse Orga is developing a financial 
>  software, where we
>  used xml as a bridge between our backend programmed with COM and our
>  frontend developed with XSLT, which transformed the 
>  XML-String passed by our
>  ServletEngine (Java) into XHTML combined with CSS and 
>  Javascript. Javascript
>  we use for some validations at the client side (IE6). This is 
>  a workaround,
>  because our business logic written in Centura/Gupta exists 
>  since many years
>  on a windows client/server system.
>  
>  My first key question is, that i want try to include the XML 
>  Schema linking
>  it with my XML Instance String, which are transformed with 
>  XSLT in the above
>  mentionred output. 
>  I know now, that MSXML 4 support the whole W3 Recommendation 
>  of XML Schema.
>  Can anyone supplies a working example, how to link this three 
>  document on
>  the client side?
>  
>  Secondly, from that point i want test, if it is possibly to do some
>  validation on the client side, to see if i can validate 
>  against the schema
>  by checking the user input, instead of using complicated 
>  javascripts. I
>  imagine for example, if some user put a not valid date format 
>  in an input
>  field, an alert box pops up with the message "This is not a valid date
>  format" . Is this possible to generate with XML Schema ? Or 
>  is XML Schema
>  designed in mind for software agents, valid data exchange and 
>  documentation
>  purpose only ?
>  
>  Thank you,
>  
>  Hans Braumuller 
>  Systementwickler Web-Design 
>  Hanse Orga AG
>  Sportallee 41 
>  D-22335 Hamburg 
>  Telefon: (+49) 040 51 48 08-62 
>  Telefax: (+49) 040 51 48 08-88 
>  E-Mail: h.braumueller@[...].de 
>  ----
>  Private
>  http://crosses.net
>  http://kunstserie.com
>  ----
>  
>  
>  
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