Re: [xml] Preserving namespace prefix when doc does not contain proper NS declaration

[Shane Adams <adamsch1 yahoo com>]

Interesting thats the similar results from my mini
program I wrote to look into tihs issue.  Let me show
an example and see if I can explain myself better

Say I have a chunk of xml I need to parse:

<item>
  <media:enclosure id="123">http://a.b.com />
  <title> This is a title </title>
</item>

Now in this example, the media namespace is not
defined, but for my purposes thats ok and I was
wondering if there was some way to access "media"
prefix when I'm iterating through the xmlNode tree
that the parser returns.  As near as I can tell, the
parser parses fine, outputting errors (which I can
turn off) but all traces of "media" are gone.

Am I making sense?

Shane


Ps - thanks for the reply.

--- Daniel Veillard <veillard redhat com> wrote:

> On Wed, Jul 20, 2005 at 05:05:37PM -0700, Shane
> Adams wrote:
> > Hi - I searched the archives and looked at the
> API,
> > hope I'm not missing something obvious.  I'm
> parsing
> > RSS feeds, alot of feeds contain extensions. 
> These
> > extra tags should be declared by a proper
> namespace
> > declaration, but in many cases they are not.
> >
> > Is there a way to force libxml2 to parse the
> document,
>
>    Yes libxml2 will parse the cocument if it is
> well-formed for XML-1.0
> you will get non-fatal namespace errors though.
>
> > and preserve the 'prefix' to a namespace that is
> not
> > defined?
>
>    I don't understand what it means. Libxml2
> behaviour is the following:
>
> laptop:~/XML -> cat tst.xml
> <foo>
>   <present:bar xmlns:present="http://example.com"/>
>   <missing:bar/>
> </foo>
>
> laptop:~/XML -> xmllint --debug tst.xml
> tst.xml:3: namespace error : Namespace prefix
> missing on bar is not defined
>   <missing:bar/>
>               ^
> DOCUMENT
> version=1.0
> URL=tst.xml
> standalone=true
>   ELEMENT foo
>     TEXT
>       content=
>     ELEMENT present:bar
>       namespace present href=http://example.com
>     TEXT
>       content=
>     ELEMENT bar
>     TEXT
>       content=
>
>   seems the prefix part of the element name is
> missing, looks like a bug.
> But libxml2 should not "invent" a namespace.
>
> Daniel
>
> -- 
> Daniel Veillard      | Red Hat Desktop team
> http://redhat.com/
> veillard redhat com  | libxml GNOME XML XSLT toolkit
>  http://xmlsoft.org/
> http://veillard.com/ | Rpmfind RPM search engine
> http://rpmfind.net/