Hope this helps,
Christian

[1] http://docs.basex.org/wiki/XQuery_Module
___________________________

On Mon, Nov 11, 2013 at 12:44 PM, Imsieke, Gerrit, le-tex <gerrit.imsieke@le-tex.de> wrote:
> I have a RESTXQ path/function that is supposed to retrieve a document
> fragment, restricted to an XPath expression that is given as a query
> parameter, i.e., as a string. The list of possible fragment XPaths has been
> calculated using path() by another function, and the user of a Web
> application may choose to retrieve any of the fragments.
>
> An example for such a path would be
> '/Q{http://www.tei-c.org/ns/1.0}TEI[1]/Q{http://www.tei-c.org/ns/1.0}text[1]/Q{http://www.tei-c.org/ns/1.0}front[1]/Q{http://www.tei-c.org/ns/1.0}div[3]'.
>
> Is there a better solution than the following, whose performance is of
> course quite poor (around 2 seconds execution time for the given documents)?
> I’m thinking of something like saxon:evaluate() or the XSLT 3 instruction
> xsl:evaluate.
>
> Maybe I’m just unaware of the obvious solution based upon XQuery 3 or a
> BaseX extension.
>
> Gerrit
>
> declare
>   %rest:path("/content/fragment/{$db}/{$doc}")
>   %rest:query-param("xpath", "{$xpath}")
>   %rest:GET
>   function page:get-frags(
>     $db as xs:string,
>     $doc as xs:string,
>     $xpath as xs:string
>   )
>     as item()*
> {
>   <response>
>     { for $doc in db:open($db, $doc)
>       return $doc//*[path(.) eq $xpath] }
>   </response>
> };
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