[jdom-interest] Two namespace-questions (revisited)

[Michael Kay]

If you don't like the XPath 1.0 specification, why not try XPath 2.0?

XPath 2.0 allows you to set a default namespace for unqualified names in
path expressions, and you can use that against JDOM input if you use Saxon.

Michael Kay
http://www.saxonica.com/ 

> -----Original Message-----
> From: jdom-interest-bounces at jdom.org 
> [mailto:jdom-interest-bounces at jdom.org] On Behalf Of Kai Wörner
> Sent: 06 June 2007 15:36
> To: jdom-interest at jdom.org
> Subject: Re: [jdom-interest] Two namespace-questions (revisited)
> 
> Hello again,
> 
> I'm stumbling over this same problem again and again! Now I'd 
> like to simply show parts of the same input XML file as last 
> time inside a Java program based on an XPath-expression. I 
> simply provide an input field for the XPath-string and seeing 
> the problems that the users already have drafting a 
> XPath-expression, I simply _know_ that they'll fail if they 
> have to add a namespace-declaration before each and every 
> element-name they use (especially since they don't have to do 
> this in any of the XML-Editors they use).
> In addition, if I use an XMLOutputter to output the matched 
> Elements, they come out with another load of namespace-bulk 
> none of my users will understand. So in my tool I'd have to 
> use an expression like:
> 
> //tei:s
> 
> to get a result that looks like that:
> 
> <s xmlns="http://www.tei-c.org/ns/1.0" part="N" TEIform="s">
>                         <cl type="lMAI tDEC" part="N" TEIform="cl">
> 
> as opposed to any XML-Editor where I'd use:
> 
> //s
> 
> to get:
> 
>                <s>
>                     <cl type="lMAI tDEC">
> 
> Is it possible /at all/ to mimic the way it works in a 
> XML-Editor at all in JDom or do I have to look someplace else?
> 
> Thanks again,
> 
> Kai
> 
> 
> XML: http://files.exmaralda.org/bl.xml
> 
> 
> 
> 
> 
> > There is no default namespace in XPath 1.0.
> > So you have to use a namespace prefix in your XPath 
> expressions. You 
> > can choose any prefix as there is no relationship between 
> the prefixes 
> > used in XPath and the ones in the document: prefixes are just 
> > shortcuts and the matching is done on the actual namespace URIs.
> >
> > The following should work:
> > XPath xp = XPath.newInstance("/x:*");
> > xp.addNamespace("x", "http://www.tei-c.org/ns/1.0"); 
> > xp.selectNodes(document);
> >
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