On dealing with periods of time rather than dates as Linked Data, I'd recommend some work by Patrick Golden and Ryan Shaw. Their paper Period assertion as nanopublication will come out in the WWW2015 workshop SAVE-SD next month. 


On Mon, Apr 20, 2015 at 9:52 PM, Stuart Yeates <[log in to unmask]> wrote:

d) Dates / Years are 'special' due to the complexity of different granularities of specification (sometimes it's a year of birth, sometimes it's an exact date, sometimes it's a time and date, sometimes the value is not in the Gregirian calendar, ...), but broadly similar functionality is available. 

On Apr 20, 2015, at 2:54 PM, Kelley McGrath <[log in to unmask]> wrote:

How about if the endpoint is a literal, say Shakespeare has birth year 1564? This would not seem to work backwards so maybe we should be making years into URIs so we can find all the 16th century dramatists or plays written in Elizabethan England.