I see that the documents that lack are namespace declarations are just not well formed. Actually, I'm a little surprised that it was possible to save them to the DB in the first place!
Interesting; how did you manage that? ;) Christian
Thanks, Tim
-- Tim A. Thompson Metadata Librarian (Spanish/Portuguese Specialty) Princeton University Library
On Wed, Jan 6, 2016 at 12:32 PM, Tim Thompson timathom@gmail.com wrote:
Hello,
I have a small database of library catalog records that I am trying to run some simple queries on, but I'm running into a namespace problem.
Some docs in the database have the following structure, with a wrapper collection element and two record elements:
<marc:collection xmlns:marc="http://www.loc.gov/MARC21/slim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd%22%3E <marc:record type="Bibliographic"> ... </marc:record> <marc:record type="Holdings"> ... </marc:record> </marc:collection>
But others lack a wrapper collection and have only a single record element, which also lacks a namespace declaration, like so:
<marc:record type="Bibliographic"> ... </marc:record>
So, I run the following query (using the DBA query interface):
declare namespace marc = "http://www.loc.gov/MARC21/slim";
let $m := collection("marc-data")/marc:record[@type = "Bibliographic"] return count($m)
And the count returns 0. However, if I change the predicate in the let clause to:
let $m := collection("marc-data")/*[local-name() = "record"][@type = "Bibliographic"]
the count returns 45.
If I am declaring the namespace in my query prolog and associating it with the same prefix as the one used in my XML documents, why don't I get the desired prefix/namespace mapping? I'm probably missing something basic, but this didn't immediately make sense to me.
Thank you, Tim
-- Tim A. Thompson Metadata Librarian (Spanish/Portuguese Specialty) Princeton University Library