[xquery-talk] Using a string parameter as path expression

[Mathias Seifert]

Hello,

I have a question for a rather simple task which I couldn't find any 
solution to. What I want to have is a function that takes an xpath as 
string parameter and then evaluates this xpath on a document. This could 
look something like the following:

declare function local:evalPath($path as xs:string) as node()
{
        let $a := doc("sample.xml")/$path
        return $a
}

Unfortunately I couldn't get this simple function to work, so my question 
now is: Is it possible with xquery at all to have a variable as the path 
expression of a for/let clause? And if so, how?

Thanks in advance.

Mathias
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