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

       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.

perl v5.30.0                                       2019-12-05                   GMOD_EXTRACT_DBXREF_FROM_GFF(1p)

       None.

       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.

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

         % gmod_extract_dbxref_from_gff.pl gff_file_name > output_file