focal (3) DateTime::Format::ISO8601.3pm.gz
NAME
DateTime::Format::ISO8601 - Parses ISO8601 formats
SYNOPSIS
use DateTime::Format::ISO8601;
my $dt = DateTime::Format::ISO8601->parse_datetime( $str );
my $dt = DateTime::Format::ISO8601->parse_time( $str );
or
my $iso8601 = DateTime::Format::ISO8601->new;
my $dt = $iso8601->parse_datetime( $str );
my $dt = $iso8601->parse_time( $str );
DESCRIPTION
Parses almost all ISO8601 date and time formats. ISO8601 time-intervals will be supported in a later
release.
USAGE
Import Parameters
This module accepts no arguments to it's "import" method.
Methods
Constructors
• new( ... )
Accepts an optional hash.
my $iso8601 = DateTime::Format::ISO8601->new(
base_datetime => $dt,
cut_off_year => 42,
legacy_year => 1,
);
• base_datetime
A "DateTime" object that will be used to fill in missing information from incomplete date/time
formats.
This key is optional.
• cut_off_year
A integer representing the cut-off point between interpreting 2-digits years as 19xx or 20xx.
2-digit years < legacy_year will be interpreted as 20xx
2-digit years >= legacy_year will be untreated as 19xx
This key defaults to the value of "DefaultCutOffYear".
• legacy_year
A boolean value controlling if a 2-digit year is interpreted as being in the current century
(unless a "base_datetime" is set) or if "cut_off_year" should be used to place the year in either
20xx or 19xx.
This key defaults to the value of "DefaultLegacyYear".
• clone
Returns a replica of the given object.
Object Methods
• base_datetime
Returns a "DateTime" object if a "base_datetime" has been set.
• set_base_datetime( object => $object )
Accepts a "DateTime" object that will be used to fill in missing information from incomplete
date/time formats.
• cut_off_year
Returns a integer representing the cut-off point between interpreting 2-digits years as 19xx or 20xx.
• set_cut_off_year( $int )
Accepts a integer representing the cut-off point between interpreting 2-digits years as 19xx or 20xx.
2-digit years < legacy_year will be interpreted as 20xx
2-digit years >= legacy_year will be interpreted as 19xx
• legacy_year
Returns a boolean value indicating the 2-digit year handling behavior.
• set_legacy_year( $bool )
Accepts a boolean value controlling if a 2-digit year is interpreted as being in the current century
(unless a "base_datetime" is set) or if "cut_off_year" should be used to place the year in either
20xx or 19xx.
Class Methods
• DefaultCutOffYear( $int )
Accepts a integer representing the cut-off point for 2-digit years when calling "parse_*" as class
methods and the default value for "cut_off_year" when creating objects. If called with no parameters
this method will return the default value for "cut_off_year".
• DefaultLegacyYear( $bool )
Accepts a boolean value controlling the legacy year behavior when calling "parse_*" as class methods
and the default value for "legacy_year" when creating objects. If called with no parameters this
method will return the default value for "legacy_year".
Parser(s)
These may be called as either class or object methods.
• parse_datetime
• parse_time
Please see the "FORMATS" section.
FORMATS
There are 6 string that can match against date only or time only formats. The "parse_datetime" method
will attempt to match these ambiguous strings against date only formats. If you want to match against
the time only formats see the "parse_time" method.
Conventions
• Expanded ISO8601
These formats are supported with exactly 6 digits for the year. Support for a variable number of
digits will be in a later release.
• Precision
If a format doesn't include a year all larger time unit up to and including the year are filled in
using the current date/time or [if set] the "base_datetime" object.
• Fractional time
There is no limit on the expressed precision.
Supported via parse_datetime
The supported formats are listed by the section of ISO 8601:2000(E) in which they appear.
5.2 Dates
5.2.1.1
YYYYMMDD
YYYY-MM-DD
5.2.1.2
YYYY-MM
YYYY
YY
5.2.1.3
YYMMDD
YY-MM-DD
-YYMM
-YY-MM
-YY
--MMDD
--MM-DD
--MM
---DD
5.2.1.4
+[YY]YYYYMMDD
+[YY]YYYY-MM-DD
+[YY]YYYY-MM
+[YY]YYYY
+[YY]YY
5.2.2.1
YYYYDDD
YYYY-DDD
5.2.2.2
YYDDD
YY-DDD
-DDD
5.2.2.3
+[YY]YYYYDDD
+[YY]YYYY-DDD
5.3.2.1
YYYYWwwD
YYYY-Www-D
5.2.3.2
YYYYWww
YYYY-Www
YYWwwD
YY-Www-D
YYWww
YY-Www
-YWwwD
-Y-Www-D
-YWww
-Y-Www
-WwwD
-Www-D
-Www
-W-D
5.2.3.4
+[YY]YYYYWwwD
+[YY]YYYY-Www-D
+[YY]YYYYWww
+[YY]YYYY-Www
5.3 Time of Day
5.3.1.1 - 5.3.1.3
optionally prefixed with 'T'
5.3.1.1
hh:mm:ss
5.3.1.2
hh:mm
5.3.1.3 - 5.3.1.4
fractional (decimal) separator maybe either ',' or '.'
5.3.1.3
hhmmss,ss
hh:mm:ss,ss
hhmm,mm
hh:mm,mm
hh,hh
5.3.1.4
-mm:ss
-mmss,s
-mm:ss,s
-mm,m
--ss,s
5.3.3 - 5.3.4.2
optionally prefixed with 'T'
5.3.3
hhmmssZ
hh:mm:ssZ
hhmmZ
hh:mmZ
hhZ
hhmmss.ssZ
hh:mm:ss.ssZ
5.3.4.2
hhmmss[+-]hhmm
hh:mm:ss[+-]hh:mm
hhmmss[+-]hh
hh:mm:ss[+-]hh
hhmmss.ss[+-]hhmm
hh:mm:ss.ss[+-]hh:mm
5.4 Combinations of date and time of day
5.4.1
YYYYMMDDThhmmss
YYYY-MM-DDThh:mm:ss
YYYYMMDDThhmmssZ
YYYY-MM-DDThh:mm:ssZ
YYYYMMDDThhmmss[+-]hhmm
YYYY-MM-DDThh:mm:ss[+-]hh:mm
YYYYMMDDThhmmss[+-]hh
YYYY-MM-DDThh:mm:ss[+-]hh
5.4.2
YYYYMMDDThhmmss.ss
YYYY-MM-DDThh:mm:ss.ss
YYYYMMDDThhmmss.ss[+-]hhmm
YYYY-MM-DDThh:mm:ss.ss[+-]hh:mm
Support for this section is not complete.
YYYYMMDDThhmm
YYYY-MM-DDThh:mm
YYYYDDDThhmmZ
YYYY-DDDThh:mmZ
YYYYWwwDThhmm[+-]hhmm
YYYY-Www-DThh:mm[+-]hh
5.5 Time-Intervals
Will be supported in a later release.
Supported via parse_time
5.3.1.1 - 5.3.1.3
optionally prefixed with 'T'
5.3.1.1
hhmmss
5.3.1.2
hhmm
hh
5.3.1.4
-mmss
-mm
--ss
STANDARDS DOCUMENT
Title
ISO8601:2000(E)
Data elements and interchange formats - information exchange -
Representation of dates and times
Second edition 2000-12-15
Reference Number
ISO/TC 154 N 362
CREDITS
Iain 'Spoon' Truskett (SPOON) who wrote DateTime::Format::Builder. That has grown into The Vacuum Energy
Powered "Swiss Army" Katana of date and time parsing. This module was inspired by and conceived in honor
of Iain's work.
Tom Phoenix (PHOENIX) and PDX.pm for helping me solve the ISO week conversion bug. Not by fixing the
code but motivation me to fix it so I could participate in a game of "Zendo".
Jonathan Leffler (JOHNL) for reporting a test bug.
Kelly McCauley for a patch to add 8 missing formats.
Alasdair Allan (AALLAN) for complaining about excessive test execution time.
Everyone at the DateTime "Asylum".
SUPPORT
Support for this module is provided via the <datetime@perl.org> email list. See <http://lists.perl.org/> for more details.
AUTHOR
Joshua Hoblitt <jhoblitt@cpan.org>
COPYRIGHT
Copyright (c) 2003-2005 Joshua Hoblitt. All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
The full text of the licenses can be found in the LICENSE file included with this module, or in
perlartistic and perlgpl as supplied with Perl 5.8.1 and later.
SEE ALSO
DateTime, DateTime::Format::Builder, <http://datetime.perl.org/>