Re: [eXist-TEIXML] A branching problem

[Jens Ø. P. <oe...@gm...>]

On Dec 21, 2012, at 11:54 AM, Peter Watson <pet...@ke...> wrote:

> Hi 
> 
> I'm trying to find a method of getting a program to branch depending on the parameter provided.  After determining the selection, the following processes are identical.  The following code will only provide data for  $name-predicate.  If I change the order, it works for a $place-predicate only. I presume from this that this particular use of a conditional clause is invalid.  What alternatives do I have for achieving the desired result? (Apart from separate XQueries which is where I am at the moment. I've also tried putting alternatives into the predicate which according to Presley p 46

I assume you mean Pris[cilla Walms]ley!

> does seem to be legitimate - see below, but that does not work either).

What is it you have found not to work?

Jens

> 
> Best wishes
> 
> Peter
> 
> let $name-predicate := local:get-name-predicate(request:get-parameter('people',''))
> let $place-predicate := local:get-name-predicate(request:get-parameter('place',''))
> let $selected-documents :=
> (if($name-predicate) then (collection('/db/punch/data')//tei:persName[@corresp=$name-predicate]) 
> else if($place-predicate) then  (collection('/db/punch/data')//tei:placeName[@corresp=$place-predicate])
>   else ())
> return $selected-documents  
> 
> Alternative predicate:
> let $selected-documents := collection('/db/punch/data')//(if($name-predicate) then tei:persName[@corresp=$name-predicate] 
> else tei:placeName[@corresp=$place-predicate] )
> return $selected-documents  
> 
> Version: 2.0-tech-preview
> SVN Revision: 15855
> Build: 20120228
> 
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