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Subject Author Date
namespace declarations in LibXML edward.kawas 04-15-2006
Posted by edward.kawas on April 15, 2006, 12:48 am
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Hi,

I am using LibXML to create an xml document. I am also using
namespaces.

The problem that i am running into is that the document that i am
creating has the namespace declaration at each element.

For instance,

<foo:A xmlns:foo="http://www.www.com/foo">
<foo:B xmlns:foo="http://www.www.com/foo"> blah blah blab </foo:B>
<foo:C xmlns:foo="http://www.www.com/foo"> blah blah blab </foo:C>
</foo:A>

And I want the following:
<foo:A xmlns:foo="http://www.www.com/foo">
<foo:B> blah blah blab </foo:B>
<foo:C> blah blah blab </foo:C>
</foo:A>

How can i achieve this?

Thanks.

Ed


Posted by Steven N. Hirsch on April 15, 2006, 1:47 pm
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edward.kawas@gmail.com wrote:
> Hi,
>
> I am using LibXML to create an xml document. I am also using
> namespaces.
>
> The problem that i am running into is that the document that i am
> creating has the namespace declaration at each element.
>
> For instance,
>
> <foo:A xmlns:foo="http://www.www.com/foo">
> <foo:B xmlns:foo="http://www.www.com/foo"> blah blah blab </foo:B>
> <foo:C xmlns:foo="http://www.www.com/foo"> blah blah blab </foo:C>
> </foo:A>
>
> And I want the following:
> <foo:A xmlns:foo="http://www.www.com/foo">
> <foo:B> blah blah blab </foo:B>
> <foo:C> blah blah blab </foo:C>
> </foo:A>
>
> How can i achieve this?

Just a WAG, but try something like this on the top element before
writing it out:

my $attr = $dom->createAttributeNS( '', 'dummy', '' );
$dom->getDocumentElement()->setAttributeNodeNS( $attr );

I solved a slightly different namespace-related problem by doing so.

Steve

Posted by edward.kawas on April 15, 2006, 4:08 pm
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Hi Steve, that didnt help.

Thanks.


Posted by Brian McCauley on April 18, 2006, 2:21 pm
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edward.kawas@gmail.com wrote:
> Hi,
>
> I am using LibXML to create an xml document. I am also using
> namespaces.
>
> The problem that i am running into is that the document that i am
> creating has the namespace declaration at each element.
>
> For instance,
>
> <foo:A xmlns:foo="http://www.www.com/foo">
> <foo:B xmlns:foo="http://www.www.com/foo"> blah blah blab </foo:B>
> <foo:C xmlns:foo="http://www.www.com/foo"> blah blah blab </foo:C>
> </foo:A>
>
> And I want the following:
> <foo:A xmlns:foo="http://www.www.com/foo">
> <foo:B> blah blah blab </foo:B>
> <foo:C> blah blah blab </foo:C>
> </foo:A>

Why do you care? The two are semantically identical. Are you concened
about file size or the aesthetic appeal of the XML source?

> How can i achieve this?

I've seen similar problems myself. Perhaps if you posted a _minimal_
but _complete_ stript that manifests the problem[1] I could advise how
to work around it.

[1] This and much other advice can be found in the posting guidelines.


Posted by edward.kawas on April 19, 2006, 7:51 pm
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Hi,

I realize that they are semantically identical.

Some example code:

use XML::LibXML;
        my $root =
         XML::LibXML::Element->new( "A" );
        $root->setNamespace( "http://www.www.com/foo", "foo" );

        my $b =
         XML::LibXML::Element->new( "B" );
        $b->setNamespace( "http://www.www.com/foo", "foo" );
        $b->setAttributeNS( "http://www.www.com/foo", "foo", "name");
        $root->appendChild($b);

        my $c =
         XML::LibXML::Element->new( "C" );
        $c->setNamespace( "http://www.www.com/foo", "foo" );
        $c->setAttributeNS( "http://www.www.com/foo", "foo", "name");
        $root->appendChild($c);

print $root->toString(2);

Thanks.

Ed


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