namespace boost {
  namespace genetics {
    template<typename ChromosomeType, typename StringType, typename IndexType, 
             bool Writable> 
      class basic_fasta_file;

    struct chromosome;
    struct fasta_file_interface;
    struct fasta_result;

    typedef basic_fasta_file< std::vector< chromosome >, augmented_string, two_stage_index, true > fasta_file;  // This container is a writable type for conversion from ASCII files. 
    typedef basic_fasta_file< mapped_vector< chromosome >, mapped_augmented_string, mapped_two_stage_index, false > mapped_fasta_file;  // This container is read only for mapped files. 
  }
}