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Re: GSXPathContext examples ?

From: Philippe Roussel
Subject: Re: GSXPathContext examples ?
Date: Sat, 5 Jan 2008 22:41:56 +0100
User-agent: Mutt/1.5.11

On Sat, Jan 05, 2008 at 10:03:28PM +0100, Nicola Pero wrote:
> There is no syntax in XPath itself to declare a namespace; you have first to
> use a separate API (dependent on the XML library in use) to tell the XML 
> parser
> about what mappings between prefixes and namespaces you want to use, then you
> can use these prefixes in your XPath expressions.
> libxml2 has this API but GSXPath was missing a wrapper method - I added it in
> subversion.  You should still be able to do it manually in older releases as 
> follows 
> (untested) --
> if ((xmlXPathRegisterNs ([p lib], "D", "DAV:") != 0)
>     ||(xmlXPathRegisterNs ([p lib], "ap", "http://apache.org/dav/props";) != 
> 0))
>     {
>       /* Error registering namespaces; do something about it.  */
>     }
> (then a query as in "//D:href" should work)

It works, thanks a lot for the tip !

> If you're using gnustep-base from trunk, you can try
> if (![p registerNamespaceWithPrefix: @"D"  href="DAV:"] 
>    || (![p registerNamespaceWithPrefix: @"ap" 
> href="http://apache.org/dav/props/";]))
> {
>   /* Error registering namespaces; do something about it.  */
> }
> which does exactly the same thing (I tried this one, and it works for me). :-)

Great. I'll add both versions to my code until this new method hits
gnustep-stable (which could be a while I guess).

Thanks again for your help and reactivity,
Never argue with an idiot. They drag you down to their level, then beat you 
with experience

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