def export_commands() ->dict:
    """Lists the available sub-commands of the 'chado export' command with corresponding descriptions"""
    return {'fasta':
        'export genome/protein sequences from the CHADO database to a FASTA file'
        , 'gff':
        'export genomic data from the CHADO database to a GFF3 file', 'gaf':
        'export gene annotation data from the CHADO database to a GAF file'}
