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RE: [xsl] Is it possible to set the default namespace with a dynamically-generated namespace uri?

2010-03-13 01:11:26
You need to create elements and attributes with the correct expanded name at
the time you create them. If that means using xsl:element, so be it.
xsl:namespace can only be used to create additional namespace nodes to those
that are created automatically for the prefixes/uris used in element and
attribute names; it can't be used to modify the name of an element or
attribute node.

As always, to understand this you need to understand the data model for
namespaces. An element/attribute name is a triple, containing (prefix, uri,
localname). A namespace node is a pair (prefix, uri). There is a consistency
rule that if an element or attribute name exists containing prefix=P uri=U
then there must be a namespace node (P, U). The namespace fixup process
ensures that this namespace node is created automatically when you create an
element or attribute. xsl:namespace is there to allow you to create
additional namespace nodes, typically for namespaces used in QName-valued
content.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay 

-----Original Message-----
From: Dimitre Novatchev [mailto:dnovatchev(_at_)gmail(_dot_)com] 
Sent: 12 March 2010 23:45
To: David Carlisle
Cc: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: Re: [xsl] Is it possible to set the default 
namespace with a dynamically-generated namespace uri?

<xsl:element name="foo" namespace="$x"

is your friend

david

Yes, but this would require creating all the output with <xsl:element>

The OP (in another forum) wants this default namespace to 
apply to literal result elements that are descendents of this 
top node.
However, they are just copied to the output 1:1 and the 
serializer takes special care to express the fact that they 
belong to no
namespace, by inserting "  xmlns=''     " on all of them.

It seems to me that using <xsl:namespace> it is not possible 
to specify a default namespace.

I would be very glad if someone provides a concrete code 
sample proving me wrong :)

Cheers,
Dimitre




On Fri, Mar 12, 2010 at 11:26 AM, David Carlisle 
<davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
On 12/03/2010 19:15, Dimitre Novatchev wrote:
http://www.w3.org/TR/xslt20/#element-namespace

If the effective value  of the name attribute is a zero-length 
string, a namespace node is added for the default namespace.


so

<foo>
<xsl:namespace name="" select="$x"/>

sets the default namespace to the uri in the variable x.

David



David, I tried this hours before asking the question.

Saxon raises this error:

er because I got it wrong, sorry, I should have checked or known or 
something.

You can add namespace nodes using xsl:namespace but you 
can't change 
the namespace of a node that's already  been created so <foo> 
<xsl;namespace name=""


doesn't work.


<xsl:element name="foo" namespace="$x"

is your friend

david






--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant 
intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
You've achieved success in your field when you don't know 
whether what you're doing is work or play
-------------------------------------
I enjoy the massacre of ads. This sentence will slaughter ads 
without a messy bloodbath.

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