> Hello - The result was just one empty meta element. Something like
> this:
>
> <FF>
> </meta>
> </FF>
That's strange, I got the right results when I ran his solution. Are
you sure you updated the filenames properly?
I thought that solution looked pretty good, though the thing that
irritated me (other than the multiple many-to-many operations) was the
fact that we were both limiting ourselves to 2 input documents.
A slightly extended version that I think will work if one needs to
add new documents would be something that understands the concepts
behind the fn:collection() function. But anyway, I hope others can
point out if there is a way to do this without multiple many-to-many
type joins (which I think both David and my solution require).
declare namespace f="uri.local-functions";
(: simulate a DB where we have a collection() function and indicies :)
declare function f:collection() {
(doc("sebi-1.xml"), doc("sebi-2.xml"))
};
(: count the number of documents :)
let $total := count(f:collection())
(: load all metadata :)
let $meta := f:collection()/*/meta
(: find unique filenames in all metadata :)
let $files := distinct-values(f:collection()/*/meta/FileName)
(: find all filenames which are in all metadata :)
let $file_intersect := (
for $f in $files
return (
let $meta := f:collection()/*/meta[FileName = $f]
where (count($meta) = $total)
return $f
)
)
(: find all metadata with the intersecting files :)
let $meta_intersect := (
for $m in $meta[FileName = $file_intersect]
return
$m/*[not(self::FileName)]
)
(: and return the new document :)
return (
<FF>
<meta>{
for $m in $meta_intersect
order by local-name($m)
return $m,
for $f in $file_intersect
return <FileName>{$f}</FileName>
}</meta>
</FF>
)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
James A. Robinson
jim.robinson-FGKo4X94FMn2fBVCVOL8/A@xxxxxxxxxxxxxxxx
Stanford University HighWire Press http://highwire.stanford.edu/
+1 650 7237294 (Work) +1 650 7259335 (Fax)
|
