[xquery-talk] Local schemas and selecting paths

[Anthony Ikeda]

> It shouldn't matter what form the namespace URI takes, so long as it
is the same in the 

> query and the source document. You haven't shown us the source
document, so 

> it's hard to tell where you've gone wrong.

 

Well the schema we've created currently doesn't have a URI as such; the
current xml document using the schema points to a tomcat server running
locally (http://localhost:8080/schemas/myNamespace.xsd).

 

So going on this I guess if I re-create the tomcat server on my machine
pointing to that URI then I guess it should work.

 

Thanks.

 

 

Regards,

Anthony Ikeda

 

Business Analyst

Copyright Agency Limited

 

________________________________

From: Michael Kay [mailto:mhk at mhk.me.uk] 
Sent: Monday, 27 September 2004 6:11 PM
To: 'Anthony Ikeda'; talk at xquery.com
Subject: RE: [xquery-talk] Local schemas and selecting paths

 

It shouldn't matter what form the namespace URI takes, so long as it is
the same in the query and the source document. You haven't shown us the
source document, so it's hard to tell where you've gone wrong.

 

Namespace URIs are not normally treated as relative URIs: they are
compared character-by-character. The W3C made a decision deprecating use
of relative URIs as namespace URIs because some vendors wanted to
interpret them relatively to the base URI, but that deprecation came
after the publication of XML Namespaces 1.0, which is explicit (a) that
relative URIs are legal as namespaces, and (b) that they are compared
character-by-character.

 

Your namespace URI appears to be a reference to an XML Schema. Some
people advocate that practice, but in my view it's confusing. The
namespace and the schema are different things and should have different
URIs. Namespace URIs are never dereferenced to find a resource on the
web, they are just abstract identifiers.

 

Michael Kay

http://www.saxonica.com/

 

	
________________________________


	From: talk-bounces at xquery.com [mailto:talk-bounces at xquery.com]
On Behalf Of Anthony Ikeda
	Sent: 27 September 2004 08:52
	To: talk at xquery.com
	Subject: [xquery-talk] Local schemas and selecting paths

	I'm new to XQuery and trying to get the hang of it and so far so
good.

	 

	One question I have is selecting XPaths using a locally declared
namespace. For example I have the following XQuery:

	 

	declare namespace a = "myNamespace.xsd"

	 

	<result>

	            {

	for $val in /a:trains/a:types

	return $val/text()

	}

	</result>

	 

	Both the xquery document and the schema exist in the same folder
side by side.

	 

	Typically I've declared namespaces using URIs rather than
locally but find that I do not get a result from the above code (The
same goes when I use the file:// protocol in the namespace declaration).

	 

	If I use the fully qualified path (I think that's what it's
called) like so:

	 

	<result>

	            {

	for $val in /*[name="trains"]/*[name="types"]

	return $val/text()

	}

	</result>

	 

	Then there is no problem.

	 

	I've tried running the above xqueries using the Stylus Studio
built in engine and the Saxon query engine (v7) also in Stylus Studio.

	 

	Does anyone know where I'm going wrong?

	 

	Regards,

	Anthony

	 

	Business Analyst

	Copyright Agency Limited

	 

	
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