[Melbourne-pm] XML Namespace

[leif.eriksen at hpa.com.au]

What about a handler with XML::Parser

...
# identify need to output element with namepace added
$p->setHandlers(Start => \&AddNamespace,
                ... # other handlers as appropriate);

sub AddNamespace {
    my ($parser, $tag, %attr) = @_;
    ...
    $NamespacedElement = GetNamespace() . $tag;
    OutputElement($handle, $NamespacedElement, %attr); # assumes 
outputting to a IO::Handle, YMMV
}
                                                                                                                                                                                                                                  


Leif Eriksen
Snr Developer
HPA Pty Ltd

ph +61 3 9217 5545



scottp at dd.com.au wrote:

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> Hi Dudes
>
> I want to take a block of XML that I get in (eg: download some XML via 
> soma URL with LWP) and output it in my block of XML.
>
> There are two issues I have to try and solve.
>
> 1. The XML I get may be invalid (happens all the time to us!)
> 2. The XML I get may not have a specific name space.
>
> Part 1 is fairly easy to deal with, put it through any XML Parser and 
> make sure it is valid XML. This means I can then pass it onto my XSLT 
> and get it to decide if it is a valid type and deal with it.
>
> My problem is part 2. Lets say I download some RSS or ATOM data. Now I 
> want that to go through particular parts of my XSLT to convert to 
> HTML. My current XSLT process all sorts of things, so therefore, to 
> prevent overlap, I want to make sure all the data is in the name space 
> atom:
>
> Example - RAW Input from LWP (taken from 
> http://www-106.ibm.com/developerworks/xml/library/x-think24.html)
>
> <?xml version="1.0" encoding="utf-8"?>
> <entry xmlns="http://purl.org/atom/ns#">
>   <title>Welcome to Stanza Web</title>
>   <author>
>     <name>Uche Ogbuji</name>
>   </author>
>   <link rel="alternate" type="text/html"
>         href="http://stanzaweb.art/2004-06-01/welcome"/>
>   <modified>2004-06-01T10:11:12Z</modified>
>   <content type="application/xhtml+xml" xml:lang="en">
>     <div class="article" xmlns="http://www.w3.org/1999/xhtml">
>       <p>Welcome to
>         <a href="http://stanzaweb.art/">Stanza Web</a>.
>         Come back often to keep track of the best in modern poetry.
>       </p>
>       <p>This site is powered by
>          <a href="http://atomenabled.org">Atom</a>
>       </p>
>     </div>
>   </content>
> </entry>
>
>
> Now lets say that I do something special with "<a/>" in my code, 
> turning them into other things - which would not necessarily be 
> appropriate for ATOM, therefore, I want to identify this as all atom. 
> Note that the <?...> would also be removed, as this would become a 
> fragment in a larger document.
>
> <atom:entry xmlns="http://purl.org/atom/ns#">
>   <atom:title>Welcome to Stanza Web</atom:title>
>   <atom:author>
>     <atom:name>Uche Ogbuji</atom:name>
>   </atom:author>
>   <atom:link rel="alternate" type="text/html"
>         href="http://stanzaweb.art/2004-06-01/welcome"/>
>   <atom:modified>2004-06-01T10:11:12Z</atom:modified>
>   <atom:content type="application/xhtml+xml" xml:lang="en">
>     <atom:div class="article" xmlns="http://www.w3.org/1999/xhtml">
>       <atom:p>Welcome to
>         <atom:a href="http://stanzaweb.art/">Stanza Web</atom:a>.
>         Come back often to keep track of the best in modern poetry.
>       </atom:p>
>       <atom:p>This site is powered by
>          <atom:a href="http://atomenabled.org">Atom</atom:a>
>       </atom:p>
>     </atom:div>
>   </atom:content>
> </atom:entry>
>
> Now in my XSLT (and other stages of the pipeline) I can guarantee that 
> no one will modify the content inside until it gets to the atom: 
> specific code.
>
> So - one suggestion has been to use regular expressions - this 
> technically works (remove all namespace and add your own) but it is 
> not ideal, and does not pick up the validation part.
>
> Any ideas on how this can be done "really" simply ? (by simple I mean 
> short code and reasonably fast, although the later is not as important).
>
> Scott
> - -- * - *  http://www.osdc.com.au - Open Source Developers Conference 
> * - *
> Scott Penrose
> VP in charge of Pancakes
> http://linux.dd.com.au/
> scottp at dd.com.au
>
> Dismaimer: If you receive this email in error - please eat it 
> immediately to prevent it from falling into the wrong hands.
>
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