NAME DateTime::Format::PGN - a Perl module for parsing and formatting date fields in chess game databases in PGN format VERSION version 0.05 SYNOPSIS use DateTime::Format::PGN; my $f = DateTime::Format::PGN->new(); my $dt = $f->parse_datetime( '2004.04.23' ); # 2004.04.23 print $f->format_datetime( $dt ); # return a DateTime::Incomplete object: my $fi = DateTime::Format::PGN->new( { use_incomplete => 1} ); my $dti = $fi->parse_datetime( '2004.??.??' ); # 2004.??.?? print $fi->format_datetime( $dti ); METHODS new(%options) Options are Boolean use_incomplete (default 0) and Boolean fix_errors (default 0). my $f = DateTime::Format::PGN->new( { fix_errors => 1, use_incomplete => 1 } ); PGN allows for incomplete dates while DateTime does not. All missing date values in DateTime default to 1. So PGN ????.??.?? becomes 0001.01.01 with DateTime. If use_incomplete => 1, a DateTime::Incomplete object is used instead where missing values are undef. I observed a lot of mistaken date formats in PGN databases downloaded from the internet. If fix_errors => 1, an attempt is made to parse the date anyway. parse_datetime($string) Returns a DateTime object or a DateTime::Incomplete object if option use_incomplete => 1. Since the first recorded chess game was played 1485, years with a leading 0 are handled as errors. format_datetime($datetime) Given a DateTime object, this methods returns a PGN date string. If the date is incomplete, use a DateTime::Incomplete object (the use_incomplete option does not affect the formatting here). Source PGN spec by Steven J. Edwards. See also * Chess::PGN::Parse * DateTime::Incomplete * AUTHOR Ingram Braun COPYRIGHT AND LICENSE This software is copyright (c) 2016 by Ingram Braun. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.