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=head1 DESCRIPTION

Allows the dynamic retrieval of sequence objects L<Bio::Seq> from the
RefSeq nucleotide database using the dbfetch script at EBI:

http://www.ebi.ac.uk/Tools/dbfetch/dbfetch

At this time the module specifically retrieves nucleotide sequences 
only.

In order to make changes transparent we have host type (currently only
ebi) and location (defaults to ebi) separated out.  This allows later
additions of more servers in different geographical locations.

The functionality of this module is inherited from L<Bio::DB::DBFetch>
which implements L<Bio::DB::WebDBSeqI>.

This module retrieves entries from EBI although it
retrieves database entries produced at NCBI. When read into bioperl
objects, the parser for GenBank format it used. RefSeq is a
NONSTANDARD GenBank file so be ready for surprises.