Re: [xml] Ability to make parser ignore the XML_NS_ERR_UNDEFINED_NAMESPACE error

[Daniel Veillard <veillard redhat com>]

On Tue, Mar 09, 2004 at 04:43:20PM -0800, Greg Shtilman wrote:
> Hi,
> 
> I am trying to find out why a missing namespace
> declaration was made a FATAL error in 2.6.x?  We use
> libxml to parse 'snippets' of XML that are missing the
> namespace declarations by design.  We used to set the
> ignore warnings flag in the older libxml, but are
> considering an upgrade to 2.6.6 now, and discovering
> that the only way to make libxml 'happy' is to
> surround the document with a dummy root node that has
> the namespace declarations prior to parsing, and
> removing them when dumping.  Would it be possible to
> provide a flag, or some other means (such as the
> ability to predefine the namespaces) to make these
> warnings ignorable in such a case?

paphio:~/XML -> cat tst2.xml
<doc s:b="foo"/>
paphio:~/XML -> xmllint tst2.xml
tst2.xml:1: namespace error : Namespace prefix s for b on doc is not defined
<doc s:b="foo"/>
              ^
<?xml version="1.0"?>
<doc b="foo"/>
paphio:~/XML ->

  it is a namespace error, not a well-formedness error. libxml2
still continues to parse the document and produce a tree in that case.
You can filter errors by domain and catch namespace errors. See 
<libxml/xmlerror.h> for a the associated APIs and definitions.
It's the first time someone complains about the new parser behaviour,
in itself it's an interesting point.

Daniel

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