Re: [eXist-TEIXML] A branching problem

[Peter W. <pet...@ke...>]

Thank you all.  I'm going to have to think about the answers.  But what 
I am finding is that where there is no $name-predicate it will not move 
on and take up a $place-predicate that is present.  I'm only looking for 
one or the other, not both.  Peter

On 21/12/2012 12:22, Wolfgang Meier wrote:
> Hi Peter,
>> 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.
> Isn't this what you would expect from an if statement? If $name-predicate is set, it will select the first clause and stop. You will always only get either the placeName or the persName elements returned.
>
> Please excuse if I'm misunderstanding what you are trying to do. I assume you want to search both, persName and placeName, if both parameters are set? In this case you need to combine the two selections, e.g. with a union:
>
> let $name-predicate := local:get-name-predicate(request:get-parameter('people',''))
> let $place-predicate := local:get-name-predicate(request:get-parameter('place',''))
>
>
> return
>      (if($name-predicate) then (collection('/db/punch/data')//tei:persName[@corresp=$name-predicate]) else ())
> union
>      (if($place-predicate) then (collection('/db/punch/data')//tei:placeName[@corresp=$place-predicate]) else ())
>
> Wolfgang
>