Re: [xsl] Problem with selecting nodes

[Jeni Tennison <jeni@xxxxxxxxxxxxxxxx>]

Hi Denis,

> In my application user should choose attributes which he wants to be
> displayed, e.g. key1 and key3 Than my XSL should select only element
> ccc with key="key1" or key="key3" with highest priority.

If you have an XSLT processor that supports a max() or highest()
function, you could use those functions. For example, with
math:highest() from EXSLT (http://www.exslt.org/math/functions/highest
- supported by Saxon, 4XSLT, jd.xslt and libxslt), you could use the
expression:

  math:highest(ccc[($key1 and @key = 'key1') or
                   ($key2 and @key = 'key2') or
                   ($key3 and @key = 'key3')]/@priority)
    /parent::ccc

In Saxon, you could alternatively use:

  saxon:highest(ccc[($key1 and @key = 'key1') or
                    ($key2 and @key = 'key2') or
                    ($key3 and @key = 'key3')],
                saxon:expression('@priority'))

In the absence of extension functions, you could use one of the
various methods for getting the node with the maximum value from a
the set of nodes you have:

 * sort all the matching ccc elements by priority and pick the first
   one
 * use a recursive template to iterate through the ccc elements in
   order of priority until you find one that matches
 * use one of Dimitre's generic templates

If you need help with one of these latter approaches, then do say.
 
Cheers,

Jeni

---
Jeni Tennison
http://www.jenitennison.com/


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