[xquery-talk] simple map at the moment is not so simple

Michael Kay mike at saxonica.com
Tue Mar 4 07:28:27 PST 2014

Show us the failing expression. I suspect the expression on the RHS of "!" should be in parens.

Michael Kay

On 4 Mar 2014, at 15:13, Ihe Onwuka <ihe.onwuka at gmail.com> wrote:

> I have something like
> distinct-values(somepath/@x) !
>  http:send-request(<http:request href="'http://www.me.com/' || . "
> method ="get"/>
> which works fine
> I now want to find out the @x's for which the http request fails which
> entails checking the status attribute of the first sequential item
> returned from the send-request (thats not the problem I already know
> how to do that).
> Now i thought you could flowr the right hand side of the map operator
> which would allow me to variablize the output of the http request and
> interrogate that. However as soon as it sees the $ in let $ following
> the ! operator it objects (well eXist does anyway).
> I'm using or trying to use ! because the iteration of it's right hand
> side is not over nodes. Not clear on exactly what can and can't follow
> !.
> So to summarize I want to output the LHS (@x) of the simple map
> expression where the http request in the RHS has not worked (i.e
> http:send-request()[1]/@status ne 200).
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