'Initialize taxonomy datatype'

def __init__(self, **kwd):

    super(Sam, self).__init__(**kwd)
    self.column_names = ['QNAME', 'FLAG', 'RNAME', 'POS', 'MAPQ', 'CIGAR', 'MRNM', 'MPOS', 'ISIZE', 'SEQ', 'QUAL', 'OPT']
