[basex-talk] Fastest way to get resources starting with path

Hello: I wonder if there's a fast way to get the contents or names of the resources that start with a certain path. We have something like this: string query = @"for $doc in collection() where substring-after(document-uri($doc), '/') = '" + documentName + @"' return $doc/Root"; But our db has millions of resources so this doesn't scale too well. I'd like a way to get the contents (or names) of resources in which the names start with a certain pattern without having to check all names. Is it possible? The alternative would be to add a field inside the xml resources, index on it, and perform a query. Thanks, Martín.