Arthur Chapman wrote:
>
> Simon Cox wrote:
>
> >1. In Helsinki it was agreed that the syntax for DC.Date
> >should be revised to include the possiblity of
> >(i) various forms of time-spans, including disjoint spans, and
> >(ii) fuzzy times.
> >It was commented that this syntax (when complete) should also be
> >transfered to DC.Coverage - logically being used also for spatial
> >extent when a "bounding box" style of extent is being specified.
> >
>
> Re Time
>
> DC.Coverage.t
>
> time spans and disjoints can be handled the same as spatial
> discontinuities,
> etc.
>
> DC.Coverage.t.min
> DC.Coverage.t.max
>
> for start and end times etc.
>
> DC.Coverage.t1.min
> DC.Coverage.t1.max
> DC.Coverage.t2.min
> DC.Coverage.t2.max
My understanding was that a syntax for indicating spans
(disjoint or not) within a single (sub-)element is
intended, rather than using repeating (sub-)elements
min/max etc - ie the contents of a single DC.Date might
include several date/times linked with suitable operators
(eg "-" , "," , "..." etc) - this would be comparable with
the proposed DC.Coverage.Polygon which has multiple
vertices.
Please will someone correct me if I have misunderstood.
--
__________________________________________________
Dr Simon Cox - Australian Geodynamics Cooperative Research Centre
CSIRO Exploration & Mining, PO Box 437, Nedlands, WA 6009 Australia
T: +61 8 9389 8421 F: +61 8 9389 1906 [log in to unmask]
http://www.ned.dem.csiro.au/SimonCox
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