On Dec 13, 2007, at 9:10 AM, Don Gourley wrote:

>> Put another way, if I want to use repository using
>> NET::OAI::Harvester to read repository data in a
>> form other than DC will I need to write an additional
>> module such as NET::OAI::Record::MARCXML?
>
> I don't know if this is the only way to do it, but that is how
> I use NET::OAI::Harvester to handle metadata in DIDL that I get
> out of a DSpace repository via a custom crosswalk plugin.  The
> harvest script simply invokes the Harvester like this:
>
> my $rec = $harvester->getRecord('identifier' => $oaiid,
>                                 'metadataPrefix' => 'oai_didl',
>                                 'metadataHandler' => 'DOC_DIDL',
>                                 'set' => $set);



On Dec 13, 2007, at 9:48 AM, Ed Summers wrote:

> Net::OAI::Record::OAI_DC is an example of a SAX filter
> which receives SAX events for each metadata record in a
> response and builds up a representation of the record.
> Since oai_dc is standard in oai-pmh-land it's assumed
> as a default a lot of the time.
>
> So if you want to retrieve another kind of metadata you
> have to write a SAX filter for it, and then reference
> it when you are calling getRecord(), listRecords() or
> listAllRecords()....
>
> And here's a barely functional MODSHandler that just
> pulls out the title:
>
> package MODSHandler;
>
>   use XML::SAX::Base;
>   use base qw(XML::SAX::Base);
>
>   sub new {
>       my $class = shift;
>       return bless {inside => 0}, ref($class) || $class;
>   }
>
>   sub title {
>       return shift->{title};
>   }
>
>   sub start_element {
>      my ($self, $element) = @_;
>      if ($element->{Name} eq 'title') {$self->{inside} = 1;}
>   }
>
>   sub end_element {
>       my ($self, $element) = @_;
>       if ($element->{Name} eq 'title') {$self->{inside} = 0;}
>   }
>
>   sub characters {
>       my ($self, $chars) = @_;
>       if ($self->{inside}) {
>           $self->{title} .= $chars->{Data};
>       }
>   }
>
>   1;



Thank you for the prompt replies, and y'all have confirmed what I
believed. The "best" way to accomplish my goal is to write a SAX
filter for the metadata schema I desire.

But I'm lazy, and even though it is not the best solution, I will
explore another option. Specifically, I will use oai_dump (which
comes with N::O::H), change the metadata scheme from oai_dc to
marc21, run the script, and parse the resulting XML. If I'm lucky my
parser will able to be written as a SAX filter that can be added to
the N::O::H distribution. In the meantime, at least I will have the
data. Wish me luck.

--
Eric Lease Morgan
University Libraries of Notre Dame