Ruby implementation of the Extended Date/Time Format Specification.
As of EDTF Specification DRAFT, August 4, 2001:
- Level 0: fully implemented
- Level 1: fully implemented
- Level 2: implemented features 202, 203, 204, 2041, 207, 208, and 209
The level 2 list extensions (203 and 204) currently return simple Ruby arrays; therefore, advanced behavior (such as 'earlier' or 'later') is parsed correctly but not yet exposed by the Ruby API.
The level 2 extensions 201 and 205 are currently not supported.
EDTF-Ruby has been confirmed to work on the following Ruby implementations: 1.9.2, 1.8.7, rbx, jruby.
EDTF Ruby is implemented as an extension to the regular Ruby date/time classes.
You can access parse EDTF strings either using Date.edtf or EDTF.parse; if
given a valid EDTF string the return value will either be an (extended) Date,
EDTF::Interval or Range (for masked precision strings) instance.
$ [sudo] gem install edtf
$ irb
> require 'edtf'
> d = Date.edtf('1984?')
> d.uncertain?
=> true
> d.certain!
> d.uncertain?
=> false
> d = Date.edtf('1999-03-uu')
> d.unspecified?
=> true
> d.unspecified? :year
=> false
> d.unspecified? :day
=> true
> Date.edtf('2003-24').winter?
=> true
> Date.edtf('196x')
=> #<Date: 1960-01-01>...#<Date: 1970-01-01>
> Date.edtf('y-17e7').year
=> -170000000
> d = Date.edtf('1984-06?/2004-08?')
> d.from.uncertain?
=> true
> d.each.to_a.length
=> 7367 # days between 1984-06 and 2004-08
> Date.edtf('2004-01-01/open').open?
=> true
For additional features take a look at the rdoc, source, and rspec examples.
$ git clone https://inukshuk@github.com/inukshuk/edtf-ruby.git
$ cd edtf-ruby
$ bundle install
$ bundle exec rake racc
$ bundle exec rspec spec
$ bundle exec cucumber
For extra credit, fork the project on github: pull requests welcome!
EDTF-Ruby was written by Sylvester Keil.
Published under the terms and conditions of the FreeBSD License; see LICENSE for details.