Re: [xml] self-defined namespace nodes

[Roopesh Chander <roop forwardbias in>]

Thanks, Martin.

This works perfectly:

xmlNode* rootelem = xmlNewNode(NULL, (xmlChar *) "html");
xmlNs* hNs = xmlNewNs(rootelem,
              (xmlChar *) "http://www.w3.org/1999/xhtml";,
              (xmlChar *) "h");
rootelem->ns = hNs;

roop.

On Monday 08 September 2008 04:40 AM, Martin (gzlist) wrote:
> On 05/09/2008, Roopesh Chander <roop forwardbias in> wrote:
> > I need a bit of help with use of namespaces in the xml tree creation
> > interface (xmlNewDoc et al.). Specifically, I need to be able to create a an
> > xml root element in a self-defined namespace, like this:
> >
> >  <h:html xmlns:h="http://www.w3.org/HTML/1998/html4";>
> >  something...
> >  </h:html>
>
> An aside, but the correct namespace uri for html-in-xml-format is
> http://www.w3.org/1999/xhtml and getting it wrong is likely to break
> whatever you're doing further down the line.
>
> >  Per the api, to create the root element with a namespace, I've gotta call
> > xmlNewNode with an xmlNs* argument. But to create an xmlNs, i need to call
> > xmlNewNs, which needs the xml element where we want the xmlns tag to be
> > added (the root element in this case, which we haven't created yet). What is
> > the indended way of creating such an element using the libxml2 tree api?
>
> See this post and the related thread:
> <http://mail.gnome.org/archives/xml/2008-June/msg00069.html>
> Also some example code:
> <http://mail.gnome.org/archives/xml/2008-August/msg00046.html>
>
> >  My present cowardly code includes the namespace in the name, like:
> >
> >  xmlNode* rootelem = xmlNewNode(NULL, (xmlChar *) "h:html");
>
> No, that is including the prefix in the name, not the namespace, the
> upshot of which means you're falling back to pre-Namespaces-in-XML
> behaviour. You want to only give local-names (the bit after the colon)
> to the node creation functions, along with a namespace object.
>
> Hope the previous mailinglist threads are enough to get you on the right track,
>
> Martin