Hi Tim,
actually <coden> is just a tag in the article xml, but it is unique, volume
and issue are also unique in the article. We have a lot of articles for each
issue, 20-30 issues for each volume, may be over 100 volumes for each coden,
The result I want to get should not be big because I only want one element for
each coden.
I see the loop, I feel it is too many loops to run.
Thanks, Helen
On Nov 17, 2010, at 11:26 AM, Tim Meagher wrote:
> Hi Helen,
>
> I guess the first thing I'd want to know is how big the resulting document is
> going to be and hw you want to store it, i.e. do you want to fragment a large
> document by coden or perhaps have a separate document for each unique coden.
>
> Secondly I would probably approach this as a transform, doing something like
> this:
>
> let $distinct-codens := distinct-values(~/article/coden/text())
> return
> for $coden in $distinct-codens
> return element coden {
> for $article in ~/article
> where $article/coden/text() eq $coden
> return (
> $article/volume,
> $article/issue,
> …
> )
> }
>
> Hope this helps! I hope to see some more robust ideas come out.
>
> Tim Meagher
>
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