timeframe

A Ruby class for describing and interacting with timeframes.

We use timeframe for data science at Brighter Planet and in production at

• Brighter Planet's impact estimate web service
• Brighter Planet's reference data web service

Originally proposed to us by the awesome programmers at fingertips

As documented by wikipedia, time intervals are like:

1. Start and end, such as 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z
2. Start and duration, such as 2007-03-01T13:00:00Z/P1Y2M10DT2H30M
3. Duration and end, such as P1Y2M10DT2H30M/2008-05-11T15:30:00Z
4. Duration only, such as P1Y2M10DT2H30M, with additional context information [not supported]

or more simply

<start>/<end>
<start>/<duration>
<duration>/<end>
<duration> [not supported]

Currently the end result is precise to 1 day, so these are the same:

• 2007-03-01T00:00:00Z/2008-05-11T00:00:00Z
• 2007-03-01/2008-05-11

This may change in the future.

http://rdoc.info/projects/rossmeissl/timeframe

Thanks to @artemk for #5

Copyright (c) 2012 Andy Rossmeissl, Seamus Abshere