[rdfweb-dev] foaf:birthday?

[Morten Frederiksen]

On Monday 17 November 2003 12:25, Danny Ayers wrote:
> Having birthdays as foaf:birthDate (as suggested on the Wiki) might put a
> lot of people off - privacy etc, it might be interesting to provide an
> alternative that is the less intrusive recurring event - expressed as
> month-day:
> <birthday>07-03</birthday>
> There's obvious overlap with rdf-calendar which could be used in the
> schema, and this could provide data for simple calendarish apps that could
> later extend further into ical/rdf-calendar.
I'd like for foaf:birthday to have a range of cal:Vevent (from the RDF 
calendar schema [1]), theoretically this would allow everyone to supply as 
much or little information as is needed/wanted, and provide for richer 
integration. However, just like for the W3C date/time profile [2], it doesn't 
seem to be possible - a complete and valid date is needed, month+day is not 
allowed.

If foaf:birthday needs to be this vague (that is, not a complete date), the 
only way seems to be specifiying a literal as the range. Not that this 
wouldn't be useful, and with some appropriate rules [3] it should be possible 
to do some nice integration and inference, but I imagine rules on literals 
will be somewhat hard to make and process.

BTW, there's also some overlap with the BIO vocabulary [4].


[1] http://www.w3.org/2002/12/cal/ical
[2] http://www.w3.org/TR/NOTE-datetime
[3] http://rdfweb.org/topic/FoafRules
[4] http://internetalchemy.org/vocab/bio/0.1/


Regards,
Morten