++ed by:

1 non-PAUSE user.

Christopher Fields


Bio::Tools::EUtilities::Info::FieldInfo - Class for storing einfo field data.


version 1.73


    #### should not create instance directly; Bio::Tools::EUtilities does this ####

    my $info = Bio::Tools::EUtilities->new(-eutil => 'einfo',
                                           -file => 'einfo.xml');
    # can also use '-response' (for HTTP::Response objects) or '-fh' (for filehandles)

    # print available databases (if data is present)
    print join(', ',$info->get_available_databases),"\n";

    # get database info
    my $db = $info->get_database; # in case you forgot...
    my $desc = $info->get_description;
    my $nm = $info->get_menu_name;
    my $ct = $info->get_record_count;
    my $dt = $info->get_last_update;
    # EUtilDataI interface methods
    my $eutil = $info->eutil;
    my $type = $info->type;

    # iterate through Field and Link objects
    while (my $field = $info->next_Field) {
        print "Field code: ",$field->get_field_code,"\n";
        print "Field name: ",$field->get_field_name,"\n";
        print "Field desc: ",$field->get_field_description,"\n";
        print "DB  : ",$field->get_database,"\n";
        print "Term ct   : ",$field->get_term_count,"\n";
        for my $att (qw(is_date is_singletoken is_hierarchy is_hidden is_numerical)) {
            print "\tField $att\n" if $field->$att;

    my @fields = $info->get_Fields; # grab them all (useful for grep)

    $info->rewind('fields'); # rewinds Field iterator


This class handles simple field data output (XML) from einfo.

For more information on einfo see:



 Title    : new
 Note     : *** should not be called by end-users ***
 Usage    : my $ct = Bio::Tools::EUtilities::Info::FieldInfo;
 Function : returns new FieldInfo instance
 Returns  : Bio::Tools::EUtilities::Info::FieldInfo instance
 Args     : none (all data added via _add_data, most methods are getters only)


 Title    : get_term_count
 Usage    : my $ct = $field->get_term_count;
 Function : returns number of terms for field
 Returns  : integer
 Args     : none


 Title    : get_field_name
 Usage    : my $nm = $field->get_field_name;
 Function : returns the full name of the field
 Returns  : string
 Args     : none


 Title    : get_full_name
 Note     : alias of get_field_name()


 Title    : get_field_code
 Usage    : $field->get_field_code()
 Function : returns field code (abbreviation) used for queries
 Returns  : string
 Args     : none


 Title    : get_field_description
 Usage    : $field->get_field_description
 Function : returns field description
 Returns  : string
 Args     : none
 Note     : alias of get_description()


 Title    : is_date
 Usage    : if ($field->is_date) {...}
 Function : returns true if field contains date information
 Returns  : Boolean
 Args     : none


 Title    : is_singletoken
 Usage    : if ($field->is_singletoken) {...}
 Function : returns true if field has single value in docsums
 Returns  : Boolean
 Args     : none


 Title    : is_hierarchy
 Usage    : if ($field->is_hierarchy) {...}
 Function : returns true if field contains hierarchal values
 Returns  : Boolean
 Args     : none


 Title    : is_hidden
 Usage    : if ($field->is_hidden) {...}
 Function : returns true if field is hidden in docsums
 Returns  : Boolean
 Args     : none


 Title    : is_numerical
 Usage    : if ($field->is_numerical) {...}
 Function : returns true if field contains a numerical value
 Returns  : Boolean
 Args     : none


 Title    : to_string
 Usage    : $foo->to_string()
 Function : converts current object to string
 Returns  : none
 Args     : (optional) simple data for text formatting
 Note     : Used generally for debugging and for various print methods


Mailing lists

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

  bioperl-l@bioperl.org                  - General discussion
  http://bioperl.org/wiki/Mailing_lists  - About the mailing lists


Please direct usage questions or support issues to the mailing list: bioperl-l@bioperl.org

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 of the bugs and their resolution. Bug reports can be submitted via the web:



Chris Fields <cjfields@bioperl.org>


This software is copyright (c) 2006-2013 by Chris Fields.

This software is available under the same terms as the perl 5 programming language system itself.