Subject: Re: Nesting XPath predicates
From: Nathan Potter <ndp@xxxxxxxxxxxxxxxxxxxx>
Date: Thu, 24 Apr 2008 12:41:07 -0700
|
Liam and Andrew,
Thank you for your thoughtfull replies!
I'll be trying to understand keys this afternoon.
Nathan
On Apr 24, 2008, at 10:35 AM, Liam Quin wrote:
On Thu, Apr 24, 2008 at 09:17:05AM +0100, Andrew Welch wrote:
On 24/04/2008, Liam Quin <liam@xxxxxx> wrote:
Easier might be
<xsl:template match="dataset">
<xsl:variable name="sn" select="serviceName" />
<xsl:value-of select="//service/[@name = $sn]/@base" />
</xsl:template>
It is easier to use a variable when you're learning, but this is what
the current() function is for:
Good point.
//service[@name = current()/serviceName]
That will work in the given example, but stops working if you put
that line inside a for-each... or more precisely works
differently :-)
so it's fragile, and not a technique that people can build on well.
Ultimately though, you should use a key here:
<xsl:key name="service-by-name" match="service" use="@name"/>
[...]
key('service-by-name', serviceName)
That's probably a better solution.
Best,
Liam
--
Liam Quin, W3C XML Activity Lead, http://www.w3.org/People/Quin/
http://www.holoweb.net/~liam/ * http://www.fromoldbooks.org/
============================================================
Nathan Potter Oregon State University, COAS
ndp at coas.oregonstate.edu 104 Ocean. Admin. Bldg.
541 737 2293 voice Corvallis, OR 97331-5503
541 737 2064 fax
|
Cart
