Hey Rob,

In my lib I have a function that protects all regexp special characters.
Maybe a bit too much heavy machinery for what it does but it works ;-)
I gladly receive improvements.

declare function route:re-escape($string as xs:string)
    as xs:string {
    let $regexp-chars :=  ('.','*','+','|','?','(',')','[',']','{','}','^')
    return
        (: Note that '\' and '$' in the fold caused invalid pattern errors therefore put them in separate replace :)
        fold-left(
            $regexp-chars, 
            replace(replace($string, '\\', '\\\\'), '\$', '\\\$'), 
            function($a, $b) {
                replace($a, '\'||$b, '\\'||$b )
            }
        )
};

--Marc


On Fri, Aug 15, 2014 at 11:55 AM, Rob Stapper <r.stapper@lijbrandt.nl> wrote:

Hi,

 

How can I construct the relative path between two elements in an xml-file.

Most probably overlooking the obvious I ended up with the solution below, which, unfortunately, triggers an runtime-error.

 

My not-working solution:

 

let $xml :=

  <xml>

    <A>

      <B/>

    </A>

  </xml>

let $b   := $xml//B

let $a   := $xml//A

 

return replace( string( path( $b))

                             , string( path( $a))

                             , ''

                            )

 

Two questions:

-          How to retrieve the relative path between two element within a xml-file?

-          Why does the solution above trigger an error? Can it be a bug? ( oops, three questions)

 

Thnx in advance for the reply,

Rob Stapper



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--
--Marc