SYNOPSIS

#should work for any class which is-a HistoryI
if ($obj->has_History) {
# do something here
}
($webenv, $querykey) = $obj->history;
$obj->history($webenv, $querykey);
$webenv = $obj->get_webenv;
$query_key = $obj->get_query_key;

DESCRIPTION

This class extends methods for any EUtilDataI implementation allow instances to dealwith NCBI history data (WebEnv and query_key). These can be used as parameters for further queries against data sets stored on the NCBI server, much like NCBI's Entrez search history. These are important when one wants to run complex queries using esearch, retrieve related data using elink, and retrieve large datasets using epost/efetch.

This class is the simplest implementation and merely holds data for future queries from any HistoryI. See also Bio::Tools::EUtilities::Query (esearch) and Bio::Tools::EUtilities::LinkSet (elink), which also implement HistoryI.

FEEDBACK

Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to one of the Bioperl mailing lists. Your participation is much appreciated.

  [email protected]               - General discussion
  http://www.bioperl.org/wiki/Mailing_lists  - About the mailing lists

Support

Please direct usage questions or support issues to the mailing list:

[email protected]

rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible.

Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track the bugs and their resolution. Bug reports can be submitted via the web.

  http://bugzilla.open-bio.org/

AUTHOR

Email cjfields at bioperl dot org

APPENDIX

The rest of the documentation details each of the object methods. Internal methods are usually preceded with a _

history

 Title    : history
 Usage    : my ($webenv, $qk) = $hist->history
 Function : Get/Set two-element list of webenv() and query_key()
 Returns  : array
 Args     : two-element list of webenv, query key

get_webenv

 Title    : get_webenv
 Usage    : my $webenv = $hist->get_webenv
 Function : returns web environment key needed to retrieve results from
            NCBI server
 Returns  : string (encoded key)
 Args     : none

get_query_key

 Title    : get_query_key
 Usage    : my $qk = $hist->get_query_key
 Function : returns query key (integer) for the history number for this session
 Returns  : integer
 Args     : none