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[EP-tech] oai filters


I would like to use oai filters:

$oai->{filters} = [

# Example: don't export any OAI records from before 2003.
#  { meta_fields => [ "date-effective" ], value=>"2003-" }

I would like to exclude all the eprints that has a certain value in it, 
I mean don't export any records which has value XXX in field YYY. Also, 
can I combine filters for example exclude all the eprints which has X in 
field Y AND Z in field W?

Thanks for any info.