Re: [Exist-open] Java Heap Space Error

[Wolfgang M. <wol...@ex...>]

> declare namespace marc = "http://www.loc.gov/MARC21/slim";
> for $record in /marc:collection/marc:record[fn:matches(., "design", 'i')]

I'm not sure why you're running out of memory, but it seems like the
case insensitive regex expression is causing it (fn:matches with the
"i" flag). As Joe suggested, either use a lucene or ngram index for
this. Both are case insensitive by default.

> let $title := $record/marc:datafield[@tag='245']/marc:subfield/text()

The MARC schema makes it difficult to write efficient queries. It's
more or less a direct mapping of the old MARC binary format into XML.
In the long run, I would recommend a mapping into the LoC's MODS
format, which is more "modern" and more friendly to query engines (and
query writers).

Wolfgang