[Esip-discovery] Proposal for seasonal / annually-repeating-dates
Lynnes, Christopher S. (GSFC-6102)
christopher.s.lynnes at nasa.gov
Fri Jul 26 17:26:55 EDT 2013
On Jul 26, 2013, at 4:51 PM, Ian Truslove <ian.truslove at nsidc.org> wrote:
> On 7/17/13 1:08 PM, "Lynnes, Christopher S. (GSFC-6102)"
> <christopher.s.lynnes at nasa.gov> wrote:
>> We find ourselves wanting to search a server for a set of repeating date
>> ranges, to support seasonal analysis. For example, we want all March
>> data over a 12 year period, say, or all data from Dec. 21 to March 20
>> over a 10 year period.
> This is of interest to us, and there's a similar issue for the search
> service's responses. We're wondering what a response for a record which
> covers multiple time ranges might look like. We came up with using the
> <time:start> and <time:stop> elements per
> sponse, and have these two dates be the earliest and latest dates covered.
> This ensures backwards compatibility.
Actually, I thought we backed away from using time:start and time:end in the response, going instead with the single element, expressed as an interval using the '/' operator, e.g. <dc:date>2002-08-30/2013-02-05</dc:date>
> In addition to that, we thought about adding custom namespaced elements to
> describe the actual ranges. For example (and assuming use of the ESIP URI
> as the namespace identifier), a dataset that covers one day per year over
> a three year period:
> <entry xmlns:esip="http://esipfed.org/ns/fedsearch/1.0/">
> <title>Some Dataset</title>
> <esip:dateRange start="2010-01-01T12:00:00.000Z"
> end="2010-01-02T11:59:59.999Z" />
> <esip:dateRange start="2011-01-01T12:00:00.000Z"
> end="2011-01-02T11:59:59.999Z" />
> <esip:dateRange start="2012-01-01T12:00:00.000Z"
> end="2012-01-02T11:59:59.999Z" />
What is the rationale for putting them in as attributes instead of element content, like the other info?
> <!-- etc -->
> Is anyone interested in these types multiple date range coverage? Is
> there a solution to this that we can steal and not have to create a custom
> Ian Truslove
> National Snow and Ice Data Center
> University of Colorado
> 449 UCB, Boulder, CO 80309
> Esip-discovery mailing list
> Esip-discovery at lists.esipfed.org
Dr. Christopher Lynnes, NASA/GSFC, ph: 301-614-5185
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