From: Ross Bamford <rossrt@...>
Date: 2006-10-06T20:09:30+09:00
Subject: Re: libxml 0.3.8 - How to validate document with schema ?

Hi,

On Tue, 2006-10-03 at 06:01 +0900, Peter Fitzgibbons wrote:
> Hello all (Ross),
> 
> I'm trying to get libxml to validate an XML::Document using #validate with
> an XML::Schema.
> 
> Can one of you describe to me what is wrong ?

> irb(main):003:0> xml = XML::Document.new('shiporder.xml')
> => <?xml version="shiporder.xml"?>
> 

Problem here - The argument to XML::Document.new is interpreted as the
XML version to use, rather than as a file to read (notice the XML
version is your filename). Try this instead:

xml = XML::Document.file('shiporder.xml')
# => <?xml version="1.0" encoding="ISO-8859-1"?>
#    <shiporder xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
orderid="889923"
#     xsi:noNamespaceSchemaLocation="shiporder.xsd">
#	< ... snipped ... >
#    </shiporder>

> irb(main):004:0> sch = XML::Schema.from_string(File.open('shiporder.xsd
> ').read)

(side note, I'd just use File.read('shiporder.xsd') here).

> => #<XML::Schema:0x365c54>
> irb(main):005:0> xml.validate sch
> error -- found validity error: no root element

Instead of validate, you need to pass your schema to validate_schema:

sch = XML::Schema.from_string(File.read('shiporder.xsd'))
# => #<XML::Schema:0xb7f098f0>

xml.validate_schema(sch)
# => true

Hope that helps,
Ross

-- 
Ross Bamford - rosco@roscopeco.REMOVE.co.uk