Title   : next_hit
 Usage   : while( $hit = $result->next_hit()) { ... }
 Function: Returns the next available Hit object, representing potential
           matches between the query and various entities from the database.
 Returns : a Bio::Search::Hit::HitI object or undef if there are no more.
 Args    : none

 Title   : query_name
 Usage   : $id = $result->query_name();
 Function: Get the string identifier of the query used by the
           algorithm that performed the search.
 Returns : a string.
 Args    : none

 Title   : query_accession
 Usage   : $id = $result->query_accession();
 Function: Get the accession (if available) for the query sequence
 Returns : a string
 Args    : none

 Title   : query_length
 Usage   : $id = $result->query_length();
 Function: Get the length of the query sequence
           used in the search.
 Returns : a number
 Args    : none

 Title   : query_description
 Usage   : $id = $result->query_description();
 Function: Get the description of the query sequence
           used in the search.
 Returns : a string
 Args    : none

 Title   : database_name
 Usage   : $name = $result->database_name()
 Function: Used to obtain the name of the database that the query was searched
           against by the algorithm.
 Returns : a scalar string
 Args    : none

 Title   : database_letters
 Usage   : $size = $result->database_letters()
 Function: Used to obtain the size of database that was searched against.
 Returns : a scalar integer (units specific to algorithm, but probably the
           total number of residues in the database, if available) or undef if
           the information was not available to the Processor object.
 Args    : none

 Title   : database_entries
 Usage   : $num_entries = $result->database_entries()
 Function: Used to obtain the number of entries contained in the database.
 Returns : a scalar integer representing the number of entities in the database
           or undef if the information was not available.
 Args    : none

 Title   : get_parameter
 Usage   : my $gap_ext = $result->get_parameter('gapext')
 Function: Returns the value for a specific parameter used
           when running this result
 Returns : string
 Args    : name of parameter (string)

 Title   : available_parameters
 Usage   : my @params = $result->available_parameters
 Function: Returns the names of the available parameters
 Returns : Return list of available parameters used for this result
 Args    : none

 Title   : get_statistic
 Usage   : my $gap_ext = $result->get_statistic('kappa')
 Function: Returns the value for a specific statistic available 
           from this result
 Returns : string
 Args    : name of statistic (string)

 Title   : available_statistics
 Usage   : my @statnames = $result->available_statistics
 Function: Returns the names of the available statistics
 Returns : Return list of available statistics used for this result
 Args    : none

 Title   : algorithm
 Usage   : my $r_type = $result->algorithm
 Function: Obtain the name of the algorithm used to obtain the Result
 Returns : string (e.g., BLASTP)
 Args    : [optional] scalar string to set value

 Title   : algorithm_version
 Usage   : my $r_version = $result->algorithm_version
 Function: Obtain the version of the algorithm used to obtain the Result
 Returns : string (e.g., 2.1.2)
 Args    : [optional] scalar string to set algorithm version value

 Title   : algorithm_reference
 Usage   : $obj->algorithm_reference($newval)
 Function: 
 Returns : value of the literature reference for the algorithm
 Args    : newvalue (optional)
 Comments: The default implementation in ResultI returns an empty string
           rather than throwing a NotImplemented exception, since
           the ref may not always be available and is not critical.

 Title   : num_hits
 Usage   : my $hitcount= $result->num_hits
 Function: returns the number of hits for this query result
 Returns : integer
 Args    : none

 Title   : hits
 Usage   : my @hits = $result->hits
 Function: Returns the available hits for this Result
 Returns : Array of Bio::Search::Hit::HitI objects
 Args    : none

 Usage     : $nohits = $blast->no_hits_found( [iteration_number] ); 
 Purpose   : Get boolean indicator indicating whether or not any hits
             were present in the report.

             This is NOT the same as determining the number of hits via
             the hits() method, which will return zero hits if there were no
             hits in the report or if all hits were filtered out during the parse.

             Thus, this method can be used to distinguish these possibilities
             for hitless reports generated when filtering.

 Returns   : Boolean
 Argument  : (optional) integer indicating the iteration number (PSI-BLAST)
             If iteration number is not specified and this is a PSI-BLAST result,
             then this method will return true only if all iterations had
             no hits found.

 Usage     : $blast->set_no_hits_found( [iteration_number] ); 
 Purpose   : Set boolean indicator indicating whether or not any hits
             were present in the report.
 Returns   : n/a
 Argument  : (optional) integer indicating the iteration number (PSI-BLAST)

 Usage     : $num_iterations = $blast->iterations;  (get)
             $blast->iterations($num_iterations);   (set)
 Purpose   : Set/get the number of iterations in the Blast Report (PSI-BLAST).
 Returns   : Total number of iterations in the report
 Argument  : integer  (when setting)

 Usage     : if( $blast->psiblast ) { ... }
 Purpose   : Set/get a boolean indicator whether or not the report 
             is a PSI-BLAST report.
 Returns   : 1 if PSI-BLAST, undef if not.
 Argument  : 1 (when setting)