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.
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/>