NAME

       gmod_extract_dbxref_from_gff.pl - Extracts Dbxrefs from GFF3 lines that have Target
       attributes

SYNOPSIS

         % gmod_extract_dbxref_from_gff.pl gff_file_name > output_file

DESCRIPTION

       For GFF3 lines of the form:

        chr1 CDNA  cDNA_match  69388   69593  0  -  .  Dbxref=Sorghum_CDNA:Contig_448;Target=Contig_448 75 295 +

       that is, that have both Target and Dbxref attributes, this script extracts the Dbxref
       value and prints out a list of the database and accession parts of the Dbxref value.  This
       functionality depends on a standard format for the Dbxref value, one where the name of the
       database preceeds the accession and are separated by a colon.

   Rationale
       Another script, gmod_make_gff_from_dbxref.pl, takes a list of databases and accessions
       (like this script provides) and a directory of FASTA files and builds a GFF3 file that
       corresponds to those targets.  The use for these files is to load them into Chado before
       that compuational analysis results are loaded to ensure that the database has a complete
       picture of the analysis performed.

COMMAND-LINE OPTIONS

       None.

AUTHOR

       Scott Cain <cain@cshl.org>

       Copyright (c) 2007

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.