Re: Select Parent when child exists

On 27/11/2007, Tim Gaunt <info@xxxxxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> I'm trying to select all the parents that have a child node matching a
> certain value. It's basically transforming a blog RSS feed and I only want
> to select those posts that have a specific tag.
>
> The feed looks like this:
> <feed>
>         <post>
>                 <title>Title of the post 1</title>
>                 <tags>
>                         <tag>example</tag>
>                 </tags>
>         </post>
>         <post>
>                 <title>Title of the post 2</title>
>                 <tags>
>                         <tag>example2</tag>
>                 </tags>
>         </post>
>         <post>
>                 <title>Title of the post 3</title>
>                 <tags>
>                         <tag>example</tag>
>                         <tag>example3</tag>
>                 </tags>
>         </post>
> </feed>
>
> In this example I want posts 1 and 3.
>
> I've had a Google around but I've not found any definitive answer. I was
> thinking of an if statement but I would like to look the latest x posts and
> I'm not sure how I can do that using an if statement as postion() is
> incremental regardless of the quantifier.

If you mean, "how do you select all <post> elements that contain a
child <tag> element with the value 'example' " then then its:

select="post[tags/tag = 'example']"


-- 
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/