Just a follow-up on the representation of Date Ranges in dublin core. I was
under the mistaken impression that you needed to use a DCMI Period encoding
to represent a date range, but apparently ISO 8601 time intervals are
perfectly valid. In order to clarify the situation, the DC Date Working
Group has recently recommended the following replacement for the comment
associated with the date element:
"Typically, Date will be associated with the creation or availability of the
resource. A date value may be a single date or a date range. Date values may
express temporal information at any level of granularity (including time).
Recommended best practice for encoding the date value is to supply an
unambiguous representation of the single date or date range using a
widely-recognized syntax (e.g., YYYY-MM-DD for a single date;
YYYY-MM-DD/YYYY-MM-DD for a date range; YYYY-MM-DDTHH:MM to specify a single
date and time down to the minute)."
Full details of the recommendation can be found here:
http://dublincore.org/usage/meetings/2005/09/madrid/files/2005-07-29.date-comment.txt
Personally I think that makes the idea of using dublin core for this
extension a whole lot more palatable.
