You are fetching the document twice, aren't you? Try this:
collection("metadata")//dt:identifier[. = $id]/root()
I don't really like using // but in this case it may be the best option.
-- Mike
On May 9, 2012, at 13:37, Jakob Fix <[email protected]> wrote:
> Hi,
>
> So far I've been successfully using
> document("/content/[type]/[id].xml") to efficiently access a document.
> This worked because I had both the [type] and the [id] values that
> make up the path and the filename.
>
> Now my scenario has changed and I no longer know the [type] bit of the
> path. For convenience I still want to store all documents belonging
> to a given [type] in the corresponding subdirectory (although this may
> be negotiable).
>
> The only way that I've found so far, and which is horribly inefficient
> is to look inside the document for the [id] value, like so:
>
> let $doc as node() :=
> document(xdmp:node-uri(collection("metadata")/*[dt:identifier = $id]))
>
> A document has a type specific root element (such as Book, Article,
> ...), and as one if its children the <dt:identifier> element. This
> takes consistently longer than a second to execute.
>
> I've considered and rejected creating a specific collection for each
> identifier, i.e. I would end up with one collection per element which
> seems to be counter the concept of collections which is intended to
> regroup documents with common properties.
>
> I appreciate your input.
>
> cheers,
> Jakob.
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