WebService::CIA::Source::DBM - An interface to a DBM copy of the CIA World Factbook

       Ian Malpass (ian-cpan@indecorous.com)

       Copyright 2003-2007, Ian Malpass

       This library is free software; you can redistribute it and/or modify it under  the  same  terms  as  Perl
       itself.

       The          CIA          World          Factbook's          copyright          information          page
       (<https://www.cia.gov/library/publications/the-world-factbook/docs/contributor_copyright.html>) states:

         The Factbook is in the public domain. Accordingly, it may be copied
         freely without permission of the Central Intelligence Agency (CIA).

       WebService::CIA::Source::DBM is an interface to a pre-compiled DBM copy of the CIA World Factbook.

       The module can also be used to make the DBM file, taking data from WebService::CIA::Parser (or
       WebService::CIA::Source::Web) and inserting it into a DBM.

       A script to do this - webservice-cia-makedbm.pl - should be included in this module's distribution.

       Apart from "new", these methods are normally accessed via a WebService::CIA object.

       "new(\%opts)"
           This  method  creates a new WebService::CIA::Source::DBM object. It takes a hashref of options. Valid
           keys are "DBM" and "Mode".

           DBM is mandatory and should be the location of the DBM file to be used.

           Mode is optional and can be either "read" or "readwrite". It defaults to "read".

       "value($country_code, $field)"
           Retrieve a value from the DBM.

           $country_code    should    be    the     FIPS     10-4     country     code     as     defined     in
           <https://www.cia.gov/library/publications/the-world-factbook/appendix/appendix-d.html>.

           $field  should  be  the  name  of  the  field  whose  value  you  want  to  retrieve,  as  defined in
           <https://www.cia.gov/library/publications/the-world-factbook/docs/notesanddefs.html>.
           (WebService::CIA::Parser also creates four extra fields: "URL", "URL - Print", "URL - Flag", and "URL
           - Map" which are the URLs of the country's Factbook page, the printable version of that page,  a  GIF
           map of the country, and a GIF flag of the country respectively.)

       "all($country_code)"
           Returns  a  hashref of field-value pairs for $country_code or an empty hashref if $country_code isn't
           in the DBM.

       "set($country_code, $data)"
           Insert or update data in the DBM.

           $country_code should be as described above.

           $data is a hashref of the data to store (as Field => Value).

           "set" overwrites any data already in the DBM under $country_code.

       "dbm()"
           Returns a reference to the DBM file in use.

       WebService::CIA::Source::DBM - An interface to a DBM copy of the CIA World Factbook

       WebService::CIA, WebService::CIA::Parser, WebService::CIA::Source::Web

perl v5.34.0                                       2022-06-28                  WebService::CIA::Source::DBM(3pm)

         use WebService::CIA::Source::DBM;
         my $source = WebService::CIA::Source::DBM->new({
                                                          DBM  => 'factbook.dbm',
                                                          Mode => 'read'
                                                        });